On Wed, 03 Oct 2012 23:23:11 +0200, Nico Schottelius said: > does anyone of you have a clue so far what may be causing the huge > slab usage? > > I've just found an interesting detail: umounting and cryptsetup > luksClosing frees up the used memory (not sure which one was freeing > up) For what it's worth, I'm seeing a similar problem in linux-next on my laptop - trying to run a backup to an external hard drive that has a LUKS partition on it will OOM. (For some reason having the external LUKS partition is much more problematic than the LVM-on-LUKS on the internal drive) I've started bisecting, and gotten this far: % git bisect log git bisect start # bad: [1aa44772a621e8547dc4db41b47c747469fe0ea3] Add linux-next specific files for 20121001 git bisect bad 1aa44772a621e8547dc4db41b47c747469fe0ea3 # good: [fea7a08acb13524b47711625eebea40a0ede69a0] Linux 3.6-rc3 git bisect good fea7a08acb13524b47711625eebea40a0ede69a0 # good: [526c4d73327f56f83da8b8088fd0b3c7be38c7ae] Merge remote-tracking branch 'regulator/for-next' git bisect good 526c4d73327f56f83da8b8088fd0b3c7be38c7ae # good: [961d70d88557405c5b7302c7d87752566468f035] Merge remote-tracking branch 'tty/tty-next' git bisect good 961d70d88557405c5b7302c7d87752566468f035 (That's as far as I've gotten that I trust, the next bisect hits a different problem where connecting the hard drive and *starting* cryptLuks hangs the machine hard, so I'll have to finish bisecting that problem first, then return to bisecting this one) I admit not being sure why you see it on a 3.5 kernel, but I only see it on stuff that's after 3.6-rc3.
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