Re: [systemd-devel] systemd-way for initialization zram swap
On Tue, Nov 20, 2012 at 2:30 AM, Lennart Poettering wrote: > If this is upstream in the kernel I think the nicest way to handle this > would be to extend util-linux to learn a new "zram" option or so we can > just add to the fstab lines, which sets up everything as needed. This > would then be similar to /dev/loop may be handled through fstab. FYI, I "redirected" similar question to util-linux ML http://article.gmane.org/gmane.linux.utilities.util-linux-ng/6967 ___ systemd-devel mailing list systemd-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/systemd-devel
Re: [systemd-devel] systemd-way for initialization zram swap
On Mon, 19.11.12 22:47, Maksim 'max_posedon' Melnikau (maxpose...@gmail.com) wrote: > # cat /etc/fstab | grep swap > /dev/zram0swapswap > sw,pri=1 0 0 > /dev/zram1swapswap > sw,pri=1 0 0 > /dev/zram2swapswap > sw,pri=1 0 0 > /dev/zram3swapswap > sw,pri=1 0 0 If this is upstream in the kernel I think the nicest way to handle this would be to extend util-linux to learn a new "zram" option or so we can just add to the fstab lines, which sets up everything as needed. This would then be similar to /dev/loop may be handled through fstab. Karel, does that make sense to you? Lennart -- Lennart Poettering - Red Hat, Inc. ___ systemd-devel mailing list systemd-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/systemd-devel
Re: [systemd-devel] systemd-way for initialization zram swap
> 1. this service is kind of duplicating swap.target > 2. echo inside duplicates things, which tmpfiles.d could do Maybe. IMO semantically, you have new device, that should be configured before use. It can appears after loading module. As for man 7 bootup, there is no deps between early targets. So tmpfiles could start earlier then zram device appears, and so on. I think separate service for device configuration should be used anyway. > 3. service still based on some "internals" of swap.target - it doesn't > do swaoff before ExecStop I should add RefuseManualStart=/RefuseManualStop= to unit ___ systemd-devel mailing list systemd-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/systemd-devel
Re: [systemd-devel] systemd-way for initialization zram swap
On Mon, Nov 19, 2012 at 11:16 PM, Oleksii Shevchuk wrote: > That's enough for me: > # cat /etc/systemd/system/zram-swap\@.service >... This is exactly what I dislike a bit, 1. this service is kind of duplicating swap.target 2. echo inside duplicates things, which tmpfiles.d could do 3. service still based on some "internals" of swap.target - it doesn't do swaoff before ExecStop ( I think swap.target do it for you ) I may be like to see, integration via fstab - via comment=, and systemd special behavior on comment= oin swap targets ___ systemd-devel mailing list systemd-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/systemd-devel
Re: [systemd-devel] systemd-way for initialization zram swap
That's enough for me:
# cat /etc/udev/rules.d/01-zram.rules
KERNEL=="zram[0-9]", ENV{SYSTEMD_WANTS}="zram-swap@zram%n.service",
TAG+="systemd"
# cat /etc/systemd/system/zram-swap\@.service
[Unit]
Description=Setup swap on zram based device %i
BindsTo=dev-%i.swap
After=dev-%i.device
Requires=dev-%i.device
Before=dev-%i.swap
Wants=dev-%i.swap
[Service]
Type=oneshot
RemainAfterExit=yes
EnvironmentFile=-/etc/conf.d/%i-size
ExecStart=-/bin/sh -c 'echo $SIZE > /sys/class/block/%i/disksize'
ExecStart=-/sbin/mkswap /dev/%i
ExecStop=-/bin/sh -c 'echo 1 > /sys/class/block/%i/reset'
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