(switched to email. Please respond via emailed reply-to-all, not via the bugzilla web interface). On Tue, 29 Apr 2014 20:13:44 +0000 bugzilla-daemon@xxxxxxxxxxxxxxxxxxx wrote: > https://bugzilla.kernel.org/show_bug.cgi?id=75101 > > Bug ID: 75101 > Summary: [bisected] s2disk / hibernate blocks on "Saving 506031 > image data pages () ..." > Product: Memory Management > Version: 2.5 > Kernel Version: v3.14 > Hardware: All > OS: Linux > Tree: Mainline > Status: NEW > Severity: normal > Priority: P1 > Component: Other > Assignee: akpm@xxxxxxxxxxxxxxxxxxxx > Reporter: oliverml1@xxxxxxxxxxx > Regression: No > > Created attachment 134271 > --> https://bugzilla.kernel.org/attachment.cgi?id=134271&action=edit > Full console trace with various SysRq outputs > > Since v3.14 under normal desktop usage my s2disk/hibernate often blocks on the > saving of the image data ("Saving 506031 image data pages () ..."). A means to reproduce as well as a bisection result. Nice! Thanks. Johannes, could you please take a look? > With following test I can reproduce the problem reliably: > --- > 0) Boot > > 1) Fill ram with 2GiB (+50% in my case) > > mount -t tmpfs tmpfs /media/test/ > dd if=/dev/zero of=/media/test/test0.bin bs=1k count=$[1024*1024] > dd if=/dev/zero of=/media/test/test1.bin bs=1k count=$[1024*1024] > > 2) Do s2disk > > s2disk > > --- > s2disk: Unable to switch virtual terminals, using the current console. > s2disk: Snapshotting system > s2disk: System snapshot ready. Preparing to write > s2disk: Image size: 2024124 kilobytes > s2disk: Free swap: 3791208 kilobytes > s2disk: Saving 506031 image data pages (press backspace to abort) ... 0% > > #Problem>: ... there is stays and blocks. SysRq still responds, so that I could > trigger various debug outputs. > --- > > I've bisected this to following commit: > --- > commit a1c3bfb2f67ef766de03f1f56bdfff9c8595ab14 (HEAD, refs/bisect/bad) > Author: Johannes Weiner <hannes@xxxxxxxxxxx> > Date: Wed Jan 29 14:05:41 2014 -0800 > > mm/page-writeback.c: do not count anon pages as dirtyable memory > > [...] > --- > > Reverting a1c3bfb2 fixes s2disk for me again - so basically I'm ok ;). But > maybe there is still another better solution. > > Attached is a full console trace with various SysRq outputs, possibly useful > for analyzing. > > BR, Oliver > -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>