Re: [systemd-devel] systemd-way for initialization zram swap
On Tue, Nov 20, 2012 at 2:30 AM, Lennart Poettering lenn...@poettering.net 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
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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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
