On 09/21/2007 09:33 PM, [EMAIL PROTECTED] wrote: > On Fri, 21 Sep 2007 19:30:04 +0200, Jiri Slaby said: >> On 09/21/2007 07:16 PM, [EMAIL PROTECTED] wrote: > >>> Hmm.. maybe I'm chasing a different bug manifested by the same patch. For >>> me, >>> it's been a solid lockup at X startup since -rc3-mm1, and this patch doesn't >>> change matters. >> This patch probably changes behaviour how the pages are queued on the list >> somehow. Maybe it's insane to suggest everybody with similar problem to try >> LIST_DEBUG, but just give it a try after having one of the patches applied >> ;). >> (Or have you tried yet?) > > OK, had a chance to test it, with Dave Airlie's AGP patch, and here's what it > hit: > > [ 198.925000] list_del corruption. next->prev should be ffff81000118f178, > but was ffffffff8067e050 > [ 198.925000] ------------[ cut here ]------------ > [ 198.925000] kernel BUG at lib/list_debug.c:72! > [ 198.925000] invalid opcode: 0000 [1] PREEMPT SMP > [ 198.925000] last sysfs file: > /devices/pci0000:00/0000:00:01.0/0000:01:00.0/i2c-adapter/i2c-1/i2c-1/dev > [ 198.925000] CPU 1 > [ 198.925000] Modules linked in: > > (Yes, I wish I got a backtrace, but that's as long as it lived. Apparently, > the netconsole stuff actually writing this stuff out was over on CPU0 which > then > proceeded to croak). > > Some odd SMP-related race? (x86_64 kernel on a Core2 Duo T7200, if it matters)
It is rather the other user who adds the page to some other list while being at deferred_pages list. Could you try my debug patch (http://lkml.org/lkml/2007/9/19/141)? -- Jiri Slaby ([EMAIL PROTECTED]) Faculty of Informatics, Masaryk University - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
