Gentoo zram. 15 or newer maxs0=24 .

Gentoo zram. Nov 16, 2023 · separate /var + zram for /var/tmp View unanswered posts View posts from last 24 hours Gentoo Forums Forum Index Other Things Gentoo May 26, 2024 · I configured a zram device which worked fine. I fear the demon inside them. zram: Compressed RAM-based block devices ¶ Introduction ¶ The zram module creates RAM-based block devices named /dev/zram<id> (<id> = 0, 1, ). On the other hand, with monstrosities like qtwebengine, chromium, firefox etc. 75 max-zram-size=12288 This is after a fresh boot however once the zram was full, it was compressed down to 2. If you don't use gentoo [4], the following might still be useful as a reference to customise according to your distro. zram not swapped? [SOLVED] View unanswered posts View posts from last 24 hours Gentoo Forums Forum Index Kernel & Hardware May 23, 2023 · zRAM is a Linux kernel module that allows the creation of Swap devices on memory. Jun 17, 2025 · If there is some reason that compiling on a tmpfs is desirable, consider "Portage TMPDIR on zram " instead, where the choice of compression-algorithm is a tradeoff between preserving RAM space and performance. Thanks already to everybody willing to put Jun 26, 2025 · Zram — a Linux kernel feature and userspace tools for creating compressible RAM-based block devices. zram-init swap setup for /var/tmp/portage Gentoo Forums Forum Index Portage & Programming A couple of weeks ago, I started to switch to zram. But Mar 15, 2023 · With CONFIG_ZRAM_WRITEBACK, zram can write idle/incompressible page to backing storage rather than keeping it in memory. This comprehensive guide covers installation, configuration, optimization, and monitoring for optimal results. 15, zram supports multiple compression streams and the ability to change the compression algorithms used. 13 [Solved]. Mar 18, 2024 · Gentoo Forums Forum Index Kernel & Hardware Gentoo Forums Forum Index Kernel & Hardware All times are GMT Page 1 of 1 Jump to: You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum [Solved] zram-init-3. The contents of this document, unless otherwise expressly stated, are licensed under the CC-BY-SA-4. Have in mind zram consumes ~10% of the declared device size only to keep the data structures up, even when the device is empty. Scripts to support compressed swap devices or ramdisks with zRAM https://github. I'm quite lost in debugging that and would be very grateful for any help. Configuration of storage devices. zram (previously called compcache) can create RAM based block devices. zram doesn't work anymore View unanswered posts View posts from last 24 hours Gentoo Forums Forum Index Other Things Gentoo The instruction you can give to zram are "idle | huge", you issue the instruction into zram instrument (writeback) that is when zram will perform freeze the block device system and examine pages for marker of "idle" or "huge (as incompressible)" write pages match the instruction then unfree the block device. setup zram on Gentoo Linux with openRC. /var/tmp/portage in zram View unanswered posts View posts from last 24 hours Gentoo Forums Forum Index Portage & Programming View previous topic :: View next topic Author Message hedmoVeteran Joined: 29 Aug 2009 Posts: 1305 Location: sweden Posted: Tue Jan 21, 2020 7:23 pmPost subject: /var/tmp/portage in zram hi all at the moment i am running : Code: tmpfs /var/tmp/portage tmpfs size=10G,uid Aug 25, 2024 · This wiki page explains how to install a 64bit Gentoo system on the Raspberry Pi 4. Install zram-init and configure it accordingly for your particular needs. It is a module of the mainline Linux kernel since 3. Contribute to systemd/zram-generator development by creating an account on GitHub. After read the gentoo wiki for zram: https://wiki. At least arrange any mechanism using tmpfs to allow a portage. [zram]Failed to start zram View unanswered posts View posts from last 24 hours Gentoo Forums Forum Index Kernel & Hardware Oct 31, 2024 · It’s not so much a question of whether it’s in a VM or on the host, as it is a question of how much RAM there is. It uses a part of the available RAM as compressed swap space. [zram]Failed to start zram View unanswered posts View posts from last 24 hours Gentoo Forums Forum Index Kernel & Hardware Gentoo Forums Forum Index Other Things Gentoo Gentoo Forums Forum Index Other Things Gentoo All times are GMT Page 1 of 1 Jump to: You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum [zram]Failed to start zram View unanswered posts View posts from last 24 hours Gentoo Forums Forum Index Kernel & Hardware With CONFIG_ZRAM_WRITEBACK, zram can write idle/incompressible page to backing storage rather than keeping it in memory. Add new sections at the bottom of the page, under a heading (== ==). To use the feature, admin should set up backing device via: Nov 19, 2022 · zram not swapped? [SOLVED] View unanswered posts View posts from last 24 hours Gentoo Forums Forum Index Kernel & Hardware Sep 6, 2021 · Hi folks, I set up zram according to the wiki, using systemd and udev. /var/tmp/portage in zram View unanswered posts View posts from last 24 hours Gentoo Forums Forum Index Portage & Programming View previous topic :: View next topic Author Message hedmoVeteran Joined: 29 Aug 2009 Posts: 1334 Location: sweden Posted: Tue Jan 21, 2020 7:23 pmPost subject: /var/tmp/portage in zram hi all at the moment i am running : Code: tmpfs /var/tmp/portage tmpfs size=10G,uid Nov 16, 2023 · separate /var + zram for /var/tmp View unanswered posts View posts from last 24 hours Gentoo Forums Forum Index Other Things Gentoo Mar 15, 2024 · The instruction you can give to zram are "idle | huge", you issue the instruction into zram instrument (writeback) that is when zram will perform freeze the block device system and examine pages for marker of "idle" or "huge (as incompressible)" write pages match the instruction then unfree the block device. 0 startup errors View unanswered posts View posts from last 24 hours Gentoo Forums Forum Index Portage & Programming Putting portage workspace on tmpfs buys less than it might, as in most cases the files will remain cached and you only save the writes to disk. swap. This doesn’t let you just say “a 4 GB RAM system will act like it has 12 GB Gentoo Forums Forum Index Unsupported Software Gentoo Forums Forum Index Unsupported Software All times are GMT Page 1 of 1 Jump to: You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum View previous topic :: View next topic Author Message proteusx Guru Joined: 21 Jan 2008 Posts: 340 Init script for zRam. 13 [Solved] Does Gentoo support zswap (openrc) as seen on fedora 33? I cannot find any explicit guidance in the handbook. Jan 21, 2025 · The zram module creates RAM-based block devices named /dev/zram<id> (<id> = 0, 1, ). Jul 10, 2025 · root # mkswap /dev/sda2 root # swapon /dev/sda2 Note Alternatively, zram could be used on systems with a large amount of RAM but do note ZFS will cache data to RAM for speed. I have envisioned a lot of use-cases for optane filesystem cache (bcachefs and zfs could greatly benefit from it) swap on low memory systems zRAM backing device Which led me to here asking few questions regarding zRAM. Contribute to phunehehe/gentoo-zram development by creating an account on GitHub. /var/tmp/portage in zram View unanswered posts View posts from last 24 hours Gentoo Forums Forum Index Portage & Programming View previous topic :: View next topic Author Message hedmoVeteran Joined: 29 Aug 2009 Posts: 1337 Location: sweden Posted: Tue Jan 21, 2020 7:23 pmPost subject: /var/tmp/portage in zram hi all at the moment i am running : Code: tmpfs /var/tmp/portage tmpfs size=10G,uid separate /var + zram for /var/tmp View unanswered posts View posts from last 24 hours Gentoo Forums Forum Index Other Things Gentoo /var/tmp/portage in zram View unanswered posts View posts from last 24 hours Gentoo Forums Forum Index Portage & Programming View previous topic :: View next topic Author Message hedmoVeteran Joined: 29 Aug 2009 Posts: 1331 Location: sweden Posted: Tue Jan 21, 2020 7:23 pmPost subject: /var/tmp/portage in zram hi all at the moment i am running : Code: tmpfs /var/tmp/portage tmpfs size=10G,uid Sep 6, 2021 · Hi folks, I set up zram according to the wiki, using systemd and udev. Contribute to hertz-hwang/zram-on-Gentoo development by creating an account on GitHub. Sep 16, 2025 · The zram kernel module enables support for creating compressed block devices in RAM. Monitor of storage devices. Currently I dont use a Gentoo-machine with less, so tmpfs is my choice on the tablet and a separate spinning drive on my main rig. External resources Upstream kernel. org documentation on swap suspend References ↑ Swapfile — BTRFS documentation ↑ Systemd Documentation - systemd. Gentoo Forums Forum Index Other Things Gentoo Gentoo Forums Forum Index Other Things Gentoo All times are GMT Page 1 of 1 Jump to: You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum My /etc/conf. Gentoo Forums Forum Index Other Things Gentoo Gentoo Forums Forum Index Other Things Gentoo All times are GMT Page 1 of 1 Jump to: You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum zram-init /tmp issues => no ip View unanswered posts View posts from last 24 hours Gentoo Forums Forum Index Kernel & Hardware The instruction you can give to zram are "idle | huge", you issue the instruction into zram instrument (writeback) that is when zram will perform freeze the block device system and examine pages for marker of "idle" or "huge (as incompressible)" write pages match the instruction then unfree the block device. Partition of storage devices. com/vaeth/zram-init/ Overview Dependencies QA report Pull requests 0 Bugs 0 Security 0 Changelog zram (previously called compcache) is a Linux kernel feature and userspace tools for creating compressible RAM-based block devices. 0 startup errors View unanswered posts View posts from last 24 hours Gentoo Forums Forum Index Portage & Programming Optane, swap ,zRAM and backing device View unanswered posts View posts from last 24 hours Gentoo Forums Forum Index Kernel & Hardware Gentoo Forums Forum Index Kernel & Hardware Gentoo Forums Forum Index Kernel & Hardware All times are GMT Page 1 of 1 You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum Gentoo Forums Forum Index Kernel & Hardware Gentoo Forums Forum Index Kernel & Hardware All times are GMT Page 1 of 1 You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum zram modules fail to load on 5. I’m looking for disk backed zsawp not swap in zram. I have no backup device, which seems to cause problems for you. Sep 6, 2021 · Hi folks, I set up zram according to the wiki, using systemd and udev. Then you can try to play with a few features in /sys/block/zram* to setup the size and such. 15 or newer maxs0=24 I have an M93p that is limited to 16GB of RAM due to chipset limitations. Pages written to these disks are compressed and stored in memory itself. 15, zram supports multiple compression streams and the ability to change the compression algorithms without a system restart. Unlike zswap, zram does not require a normal swap partition/file to be present on your disk, as it will act as the actual swap partition. There's been quite a sale for optane based SSDs so I decided to bite the bullet. zram-init swap setup for /var/tmp/portage View unanswered posts View posts from last 24 hours Gentoo Forums Forum Index Portage & Programming Having Zram + backing device will give you 8Gb of swap space but I'm not aware if you can prioritize one of them, while zswap has that by design. Some of the use cases include /tmp storage, use as swap disks, various caches under The instruction you can give to zram are "idle | huge", you issue the instruction into zram instrument (writeback) that is when zram will perform freeze the block device system and examine pages for marker of "idle" or "huge (as incompressible)" write pages match the instruction then unfree the block device. The kernel can evict pages from zswap if memory is running low, because the pages also exist on a physical swap device, and recent versions of zswap can even auto-evict pages when they get swapped back in, meaning that Jan 21, 2020 · The memory is freed when the zram block device receives a trim command. The instruction you can give to zram are "idle | huge", you issue the instruction into zram instrument (writeback) that is when zram will perform freeze the block device system and examine pages for marker of "idle" or "huge (as incompressible)" write pages match the instruction then unfree the block device. Thanks already to everybody willing to put separate /var + zram for /var/tmp View unanswered posts View posts from last 24 hours Gentoo Forums Forum Index Other Things Gentoo separate /var + zram for /var/tmp View unanswered posts View posts from last 24 hours Gentoo Forums Forum Index Other Things Gentoo separate /var + zram for /var/tmp View unanswered posts View posts from last 24 hours Gentoo Forums Forum Index Other Things Gentoo /var/tmp/portage in zram View unanswered posts View posts from last 24 hours Gentoo Forums Forum Index Portage & Programming View previous topic :: View next topic Author Message hedmoVeteran Joined: 29 Aug 2009 Posts: 1334 Location: sweden Posted: Tue Jan 21, 2020 7:23 pmPost subject: /var/tmp/portage in zram hi all at the moment i am running : Code: tmpfs /var/tmp/portage tmpfs size=10G,uid separate /var + zram for /var/tmp View unanswered posts View posts from last 24 hours Gentoo Forums Forum Index Other Things Gentoo separate /var + zram for /var/tmp View unanswered posts View posts from last 24 hours Gentoo Forums Forum Index Other Things Gentoo /var/tmp/portage in zram View unanswered posts View posts from last 24 hours Gentoo Forums Forum Index Portage & Programming View previous topic :: View next topic Author Message hedmoVeteran Joined: 29 Aug 2009 Posts: 1305 Location: sweden Posted: Tue Jan 21, 2020 7:23 pmPost subject: /var/tmp/portage in zram hi all at the moment i am running : Code: tmpfs /var/tmp/portage tmpfs size=10G,uid /var/tmp/portage in zram View unanswered posts View posts from last 24 hours Gentoo Forums Forum Index Portage & Programming View previous topic :: View next topic Author Message hedmoVeteran Joined: 29 Aug 2009 Posts: 1321 Location: sweden Posted: Tue Jan 21, 2020 7:23 pmPost subject: /var/tmp/portage in zram hi all at the moment i am running : Code: tmpfs /var/tmp/portage tmpfs size=10G,uid separate /var + zram for /var/tmp View unanswered posts View posts from last 24 hours Gentoo Forums Forum Index Other Things Gentoo /var/tmp/portage in zram View unanswered posts View posts from last 24 hours Gentoo Forums Forum Index Portage & Programming View previous topic :: View next topic Author Message hedmoVeteran Joined: 29 Aug 2009 Posts: 1299 Location: sweden Posted: Tue Jan 21, 2020 7:23 pmPost subject: /var/tmp/portage in zram hi all at the moment i am running : Code: tmpfs /var/tmp/portage tmpfs size=10G,uid /var/tmp/portage in zram View unanswered posts View posts from last 24 hours Gentoo Forums Forum Index Portage & Programming View previous topic :: View next topic Author Message hedmoVeteran Joined: 29 Aug 2009 Posts: 1286 Location: sweden Posted: Tue Jan 21, 2020 7:23 pmPost subject: /var/tmp/portage in zram hi all at the moment i am running : Code: tmpfs /var/tmp/portage tmpfs size=10G,uid zram modules fail to load on 5. Thanks already to everybody willing to put Dec 18, 2023 · udisks is a D-Bus daemon offering storage related services. Jul 16, 2025 · Zram — a Linux kernel feature and userspace tools for creating compressible RAM-based block devices. 14. zram-init swap setup for /var/tmp/portage View unanswered posts View posts from last 24 hours Gentoo Forums Forum Index Portage & Programming /var/tmp/portage in zram View unanswered posts View posts from last 24 hours Gentoo Forums Forum Index Portage & Programming View previous topic :: View next topic Author Message hedmoVeteran Joined: 29 Aug 2009 Posts: 1268 Location: sweden Posted: Tue Jan 21, 2020 7:23 pmPost subject: /var/tmp/portage in zram hi all at the moment i am running : Code: tmpfs /var/tmp/portage tmpfs size=10G,uid The instruction you can give to zram are "idle | huge", you issue the instruction into zram instrument (writeback) that is when zram will perform freeze the block device system and examine pages for marker of "idle" or "huge (as incompressible)" write pages match the instruction then unfree the block device. 0 startup errors View unanswered posts View posts from last 24 hours Gentoo Forums Forum Index Portage & Programming Optane, swap ,zRAM and backing device View unanswered posts View posts from last 24 hours Gentoo Forums Forum Index Kernel & Hardware With CONFIG_ZRAM_WRITEBACK, zram can write idle/incompressible page to backing storage rather than keeping it in memory. Or, perhaps, to resurrect eudevd, on the same terms. 13 where starting fails with systemd not being able to load the zram module. I'm guessing there won't be many volunteers, until a time comes when the systemd version of udevd becomes impossible to use without the rest of systemd. Talk:Zram Note This is a Talk page - please see the documentation about using talk pages. According to zram - Gentoo wiki, zram offers about a 3:1 compression ratio. To use the feature, admin should set up backing device via: The instruction you can give to zram are "idle | huge", you issue the instruction into zram instrument (writeback) that is when zram will perform freeze the block device system and examine pages for marker of "idle" or "huge (as incompressible)" write pages match the instruction then unfree the block device. And what are the best configurations for performance? Apr 26, 2025 · Discover how to enhance the performance of low-memory Linux systems with Zram. d/zram-init The instruction you can give to zram are "idle | huge", you issue the instruction into zram instrument (writeback) that is when zram will perform freeze the block device system and examine pages for marker of "idle" or "huge (as incompressible)" write pages match the instruction then unfree the block device. The Gentoo Name and Logo Usage Guidelines apply. But since a while, it doesn't anymore. May 26, 2024 · Gentoo Forums Forum Index Other Things Gentoo View previous topic :: View next topic Author Message AnardApprentice Joined: 01 Oct 2020 Posts: 255 Posted: Sun May 26, 2024 11:18 amPost subject: zram doesn't work anymore The instruction you can give to zram are "idle | huge", you issue the instruction into zram instrument (writeback) that is when zram will perform freeze the block device system and examine pages for marker of "idle" or "huge (as incompressible)" write pages match the instruction then unfree the block device. It has been included as a module of the mainline Linux kernel since version 3. . Provided services include: Enumeration of storage devices, much like udev but with more details. If you need any settings/configurations/logs from me please let me know and I will of course provide it. 5GB used of RAM before the HDD swap started taking over. 0 license. The gentoo wiki is kinda unclear to me, I compiled zram-init But i don't understand how should i configure it?? What should i do exactly. env override for these biggies. Don't know why neither when it stopped to work Here is my config : Code: $ cat /etc/conf. zram works like tmpfs, but it compresses data. These block devices can then be used for swap or general purpose RAM disks. Jan 20, 2025 · Zswap is particularly interesting for Gentoo, because it can help make the most of limited RAM resources when emerging (compiling) large packages. Worked fine until kernel 5. To use the feature, admin should set up backing device via: Optane, swap ,zRAM and backing device View unanswered posts View posts from last 24 hours Gentoo Forums Forum Index Kernel & Hardware Mar 14, 2023 · The instruction you can give to zram are "idle | huge", you issue the instruction into zram instrument (writeback) that is when zram will perform freeze the block device system and examine pages for marker of "idle" or "huge (as incompressible)" write pages match the instruction then unfree the block device. /var/tmp/portage in zram View unanswered posts View posts from last 24 hours Gentoo Forums Forum Index Portage & Programming View previous topic :: View next topic Author Message hedmoVeteran Joined: 29 Aug 2009 Posts: 1268 Location: sweden Posted: Tue Jan 21, 2020 7:23 pmPost subject: /var/tmp/portage in zram hi all at the moment i am running : Code: tmpfs /var/tmp/portage tmpfs size=10G,uid [zram]Failed to start zram View unanswered posts View posts from last 24 hours Gentoo Forums Forum Index Kernel & Hardware Optane, swap ,zRAM and backing device View unanswered posts View posts from last 24 hours Gentoo Forums Forum Index Kernel & Hardware Optane, swap ,zRAM and backing device View unanswered posts View posts from last 24 hours Gentoo Forums Forum Index Kernel & Hardware With CONFIG_ZRAM_WRITEBACK, zram can write idle/incompressible page to backing storage rather than keeping it in memory. If I have zRAM device of size 4Gb and 4Gb size backing device, do the size add up or not? So separate /var + zram for /var/tmp View unanswered posts View posts from last 24 hours Gentoo Forums Forum Index Other Things Gentoo Gentoo Forums Forum Index Other Things Gentoo Gentoo Forums Forum Index Other Things Gentoo All times are GMT Page 1 of 1 Jump to: You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum Jul 15, 2021 · systemd-tmpfiles replaces deprecated opentmpfiles Title: systemd-tmpfiles replaces deprecated opentmpfiles Author: Georgy Yakovlev <gyakovlev@gentoo. com/systemd/zram-generator Gentoo Forums Forum Index Other Things Gentoo Gentoo Forums Forum Index Other Things Gentoo All times are GMT Page 1 of 1 Jump to: You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum A wrapper script for the zram linux kernel module with zsh and openrc support - vaeth/zram-init Nov 19, 2022 · zram not swapped? [SOLVED] View unanswered posts View posts from last 24 hours Gentoo Forums Forum Index Kernel & Hardware Optane, swap ,zRAM and backing device View unanswered posts View posts from last 24 hours Gentoo Forums Forum Index Kernel & Hardware Nov 4, 2021 · Switching to zram swap : enable disk swap as well View unanswered posts View posts from last 24 hours Gentoo Forums Forum Index Other Things Gentoo Aug 7, 2025 · Warning /var/tmp will typically also be used by Portage (under the /var/tmp/portage directory). Gentoo-wannabes Arch Linux users can refer to their own wiki as well on how to enable it. Tip On modern (fast) systems, zram is an alternative to tmpfs. Zswap — a lightweight compressed cache for swap pages. Unlike ZRAM, zswap needs an actual block device backing it, but it handles memory usage much, much better than ZRAM does. But the catch is that it does not just create them there; it also compresses them so that the system can store more data in memory, which allows accessing this data much faster than a traditional swap on SSD or … Continue reading "Enable Zram on Linux For Better System Performance" Regarding swap-on-zram as a ‘faster-than-disk swap’, outside of some really unusual circumstances zswap is pretty much always a better choice if you have conventional swap space. org> Posted: 2021-07-15 Revision: 1 News-Item-Format: 2. To use the feature, admin should set up backing device via: /var/tmp/portage in zram View unanswered posts View posts from last 24 hours Gentoo Forums Forum Index Portage & Programming Gentoo Forums Forum Index Installing Gentoo Gentoo Forums Forum Index Installing Gentoo All times are GMT Page 1 of 1 Jump to: You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum /var/tmp/portage in zram View unanswered posts View posts from last 24 hours Gentoo Forums Forum Index Portage & Programming View previous topic :: View next topic Author Message hedmoVeteran Joined: 29 Aug 2009 Posts: 1307 Location: sweden Posted: Tue Jan 21, 2020 7:23 pmPost subject: /var/tmp/portage in zram hi all at the moment i am running : Code: tmpfs /var/tmp/portage tmpfs size=10G,uid /var/tmp/portage in zram View unanswered posts View posts from last 24 hours Gentoo Forums Forum Index Portage & Programming View previous topic :: View next topic Author Message hedmoVeteran Joined: 29 Aug 2009 Posts: 1305 Location: sweden Posted: Tue Jan 21, 2020 7:23 pmPost subject: /var/tmp/portage in zram hi all at the moment i am running : Code: tmpfs /var/tmp/portage tmpfs size=10G,uid /var/tmp/portage in zram View unanswered posts View posts from last 24 hours Gentoo Forums Forum Index Portage & Programming View previous topic :: View next topic Author Message hedmoVeteran Joined: 29 Aug 2009 Posts: 1305 Location: sweden Posted: Tue Jan 21, 2020 7:23 pmPost subject: /var/tmp/portage in zram hi all at the moment i am running : Code: tmpfs /var/tmp/portage tmpfs size=10G,uid separate /var + zram for /var/tmp View unanswered posts View posts from last 24 hours Gentoo Forums Forum Index Other Things Gentoo The instruction you can give to zram are "idle | huge", you issue the instruction into zram instrument (writeback) that is when zram will perform freeze the block device system and examine pages for marker of "idle" or "huge (as incompressible)" write pages match the instruction then unfree the block device. zram has the advantages of being totally ephemeral and very fast, but it can only increase available RAM so much. Mounting of filesystems. , you need every bit of ram for compiling/linking. _________________ Greybeard Gentoo Forums Forum Index Kernel & Hardware Gentoo Forums Forum Index Kernel & Hardware All times are GMT Page 1 of 1 You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum With CONFIG_ZRAM_WRITEBACK, zram can write idle/incompressible page to backing storage rather than keeping it in memory. gentoo. The zram module creates RAM-based block devices named /dev/zram<id> (<id> = 0, 1, ). Is this only achievable with systemd? Gentoo Forums Forum Index Kernel & Hardware Gentoo Forums Forum Index Kernel & Hardware All times are GMT Page 1 of 1 You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum Is it good idea to use ZRAM on a old laptop? View unanswered posts View posts from last 24 hours [Solved] zram-init-3. If its size is too small, it will lead to build errors. To use the feature, admin should set up backing device via: separate /var + zram for /var/tmp View unanswered posts View posts from last 24 hours Gentoo Forums Forum Index Other Things Gentoo Sep 18, 2024 · I suppose the only way to win is for somebody to step up and create a new udevd, completely compatible with the existing version, but unrelated to systemd, and maintain it indefinitely. I tried to make a reiserfs or reiser4 based system on a device only to fail. These disks allow very fast I/O and compression provides good amounts of memory savings. [Solved] zram-init-3. Gentoo Packages DatabaseSystemd unit generator for zram swap devices https://github. Starting with kernel version 3. org> Author: Sam James <sam@gentoo. I don't fear the people. It achieves a compression ratio of 1:2, sometimes better. If you are putting an ext4 fs on a zram device mount it with the "discard" mount option. Zram, on another hand, is a dynamically-allocated and compressible ram disk that can be used to store anything, although the most common use case is to use it as your swap partition. Jan 20, 2025 · Gentoo Forums :: View topic - Questions about ZRAM, ZSwap Gentoo Forums Forum Index Kernel & Hardware Feb 24, 2023 · Gentoo does not use systemd by default, which is why further adjustment is necessary to enable zRAM. Mar 14, 2023 · With CONFIG_ZRAM_WRITEBACK, zram can write idle/incompressible page to backing storage rather than keeping it in memory. 0 Display-If-Installed: sys-apps/opentmpfiles Display-If-Installed: sys-apps/systemd-tmpfiles A tmpfiles [0] implementation provides a generic mechanism to View previous topic View next topic Author Message hypeboyz n00b Joined: 26 Feb 2012 Posts: 24 Mar 11, 2025 · See also Portage TMPDIR on tmpfs — It is unlikely that tmpfs will provide any performance gain for modern systems Zram — a Linux kernel feature and userspace tools for creating compressible RAM-based block devices. Also is not clear what is line 72 in your config. Look at the 3rd column of /sys/block/zram*/mm_stat to see how much actual ram is used by the zram device. Refer to Portage TMPDIR on tmpfs for appropriately sizing /var/tmp. This packages requires at least 14 GB in /var/tmp/portage. I really don't want to spend 14 GB of my 16 GB RAM for a tmpfs! That's too much! So I switched to ZRAM - and now only 5-7 GB of my RAM are Jul 25, 2011 · Note that if your remove the module some `/dev/block/253:*' will remain in the directory--253 is the major number of /dev/zram* devices, you'll have to rm them manually. org/wiki/Zram check all kernel configs, it works for /tmp and /var/tmp/portage directories as expected, but no longer for swap. d/zram-init for swap: Code: type0=swap flag0= # The default "16383" is fine for us size0=16384 mlim0= # no hard memory limit back0= # no backup device icmp0= # no incompressible page writing to backup device idle0= # no idle page writing to backup device wlim0= # no writeback_limit for idle page writing for backup device notr0= # keep the default on linux-3. The triggering factor was dev-lang/rust. Gentoo Forums Forum Index Other Things Gentoo Gentoo Forums Forum Index Other Things Gentoo All times are GMT Page 1 of 1 Jump to: You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum Systemd unit generator for zram devices. I used zram on machines with less than 8GB of RAM. I currently use a 12GB zram using zstd compression configured as follows; [zram0] zram-fraction=0. Add newer comments below older ones, sign comments using four tildes (~~~~), and indent successive comments with colons (:). To use the feature, admin should set up backing device via: Mar 9, 2024 · Gentoo Forums Forum Index Other Things Gentoo Gentoo Forums Forum Index Other Things Gentoo All times are GMT Page 1 of 1 Jump to: You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum Gentoo Forums Forum Index Other Things Gentoo Gentoo Forums Forum Index Other Things Gentoo All times are GMT Page 1 of 1 Jump to: You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum The instruction you can give to zram are "idle | huge", you issue the instruction into zram instrument (writeback) that is when zram will perform freeze the block device system and examine pages for marker of "idle" or "huge (as incompressible)" write pages match the instruction then unfree the block device. To use the feature, admin should set up backing device via: With CONFIG_ZRAM_WRITEBACK, zram can write idle/incompressible page to backing storage rather than keeping it in memory. rdakvwy ydzeht xnunnx llqqt lpdbwjn jmw objnf xbgttk rdqrt xmrcygj