Crash in wb_clear_pending() (was: Linux 2.6.35-rc4)
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From: Christoph Hellwig on 5 Jul 2010 12:50 We had a thread about it a few days ago. The following commit from Jens' 2.6.36 tree needs to go into 2.6.35 to sort the issues with the fragile wakeup mechanism which only got worse by the patches out: http://git.kernel.dk/?p=linux-2.6-block.git;a=commitdiff;h=79338d2a78ab78efdc1698f1309766a039addf9d -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
From: Ingo Molnar on 5 Jul 2010 13:20 * Ingo Molnar <mingo(a)elte.hu> wrote: > * Christoph Hellwig <hch(a)infradead.org> wrote: > > > We had a thread about it a few days ago. The following commit from > > Jens' 2.6.36 tree needs to go into 2.6.35 to sort the issues with the > > fragile wakeup mechanism which only got worse by the patches out: > > > > http://git.kernel.dk/?p=linux-2.6-block.git;a=commitdiff;h=79338d2a78ab78efdc1698f1309766a039addf9d > > I've attached it below - in case someone wants to apply it before it hits > upstream. > > Scary big patch btw. - is there no smaller fix? Nor does it apply to v2.6.35-rc4: Applying: writeback: simplify the write back thread queue error: patch failed: fs/fs-writeback.c:703 error: fs/fs-writeback.c: patch does not apply Patch failed at 0001 writeback: simplify the write back thread queue I guess it has other dependencies as well. If you want me to test the fix then please send a version that applies. Thanks, Ingo -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
From: Christoph Hellwig on 5 Jul 2010 14:30
On Mon, Jul 05, 2010 at 07:14:20PM +0200, Ingo Molnar wrote: > Nor does it apply to v2.6.35-rc4: It's indeed missing the two previous patches to the writeback code that I thought Jens sent to Linus aswell [1]. The race was initially found using a distro kernel with the patches backported, and in the meantime we've done a lot of testing with this patch (and the two previous that also were backported). I'd prefer to get this full stack that's been in -next for a while and got large machine testing, but if Jens prefers it I can aim for a smaller variant. Jens, what version do you prefer? [1] thee patches are: "writeback: remove writeback_inodes_wbc" a73dd720f081cd160e3843d531eff2195036e442 "writeback: split writeback_inodes_wb" 9f98c0faa41ae334d894762f556195c8a7fb352f -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ |