Messages in this thread | | | From | "Rafael J. Wysocki" <> | Subject | Re: [Suspend-devel] [BUG] 3.7-rc regression bisected: s2disk fails to resume image: Processes could not be frozen, cannot continue resuming | Date | Thu, 05 Sep 2013 14:23:25 +0200 |
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On Thursday, September 05, 2013 02:08:11 PM Pavel Machek wrote: > Hi! > > Rafael, Al: apparently we have a regression caused by > ba4df2808a86f8b103c4db0b8807649383e9bd13 .
I noticed that, but I'm not sure how to deal with it.
Also, s2disk still works on my test machines, so that seems to be specific to this particular configuration.
> > > after a kernel update from 3.5.7 to the latest stable I found that > > > user-space resume (from suspend-1.0 aka uswsusp) no longer works. > > > Kernel-space suspend and resume work fine (e.g. echo disk > > > > /sys/power/state), problem is with user-space support. (I need > > > user-space version because it supports image encryption.) > > > > > > After resume (essentially linuxrc) application loads image it fails > > > to apply it: > > > > > > ======================================================== > > > Processes could not be frozen, cannot continue resuming. > > > Error 11: Resource temporarily unavailable > > > > > > You can now boot the system and lose the saved state > > > or reboot and try again. > > > > > > [Notice that if you decide to reboot, you MUST NOT mount > > > any filesystems before a successful resume. > > > Resuming after some filesystems have been mounted > > > will badly damage these filesystems.] > > > > > > Do you want to continue booting (Y/n)? > > > ======================================================== > > > > > > Error code wasn't originally showed, I added it to suspend tool to > > > aid debugging. Essentially freeze ioctl on /dev/snapshot fails with > > > this error. > > > > > > I bisected a commit which introduces this bug: > > > > > > ======================================================== > > > commit ba4df2808a86f8b103c4db0b8807649383e9bd13 > > > Author: Al Viro <viro@zeniv.linux.org.uk> > > > Date: Tue Oct 2 15:29:10 2012 -0400 > > > > > > don't bother with kernel_thread/kernel_execve for launching > > > linuxrc > > > exec_usermodehelper_fns() will do just fine... > > > > > > Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> > > > ======================================================== > > > > > > In fact this commit induced/triggered at least two bugs: the first one > > > I'm facing now and the second one was fixed in commit > > > f0de17c0babe7f29381892def6b37e9181a53410: > > > make sure that /linuxrc has std{in,out,err}. > > > > > > As a temporarily workaround for this issue I reverted all changes for > > > init/do_mounts_initrd.c up to the latest working commit > > > cb450766bcafc7bd7d40e9a5a0050745e8c68b3e considering the kernel API > > > changes (kernel_execve -> sys_execve). See linuxrc-workaround.patch. > > > I understand this isn't a proper solution, I just want to show what > > > code works for me. > > > > > > I also found an interesting LKML discussion about s2disk and freezer > > > issue: http://www.spinics.net/lists/linux-nfs/msg38160.html > > > Maybe it is related to this bug, but patch proposed there doesn't in > > > my case. > > > > > > Kernel config which fails with > > > ba4df2808a86f8b103c4db0b8807649383e9bd13 and works with > > > f0de17c0babe7f29381892def6b37e9181a53410 is also attached. > > > > > > As this issue maybe hardware related, the system is 32-bit EEE PC > > > 1000H with Atom N270, 2GB RAM, 750 GB SATA drive. > > > > > > Additional (but probably useless) information on this bug may be found > > > here: https://forums.gentoo.org/viewtopic-p-7371120.html > > > > This bug is still here with 3.11-rc7 and 3.10.9. > > I opened a kernel bug 60802 for this issue: > > https://bugzilla.kernel.org/show_bug.cgi?id=60802 > > > > Any ideas? > > > > Best regards, > > Andrew Savchenko > > > > > ------------------------------------------------------------------------------ > > Introducing Performance Central, a new site from SourceForge and > > AppDynamics. Performance Central is your source for news, insights, > > analysis and resources for efficient Application Performance Management. > > Visit us today! > > http://pubads.g.doubleclick.net/gampad/clk?id=48897511&iu=/4140/ostg.clktrk > > > _______________________________________________ > > Suspend-devel mailing list > > Suspend-devel@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/suspend-devel > > > -- I speak only for myself. Rafael J. Wysocki, Intel Open Source Technology Center.
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