Messages in this thread | | | Date | Mon, 24 Jun 2013 12:49:18 -0400 | From | Dave Jones <> | Subject | Re: frequent softlockups with 3.10rc6. |
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On Mon, Jun 24, 2013 at 06:37:08PM +0200, Oleg Nesterov wrote: > On 06/24, Dave Jones wrote: > > > > On Mon, Jun 24, 2013 at 10:52:29AM -0400, Steven Rostedt wrote: > > > > > > > check_list_nodes corruption. next->prev should be prev (ffff88023b8a1a08), but was 00ffff88023b8a1a. (next=ffff880243288001). > > > > > > > > Can't find "check_list_nodes" in lib/list_debug.c or elsewhere... > > > > > > > > > [<ffffffff816e467d>] dump_stack+0x19/0x1b > > > > > [<ffffffff8104a0c1>] warn_slowpath_common+0x61/0x80 > > > > > [<ffffffff8104a12c>] warn_slowpath_fmt+0x4c/0x50 > > > > > [<ffffffff81112c61>] rb_head_page_deactivate.isra.39+0x61/0x80 > > > > > > > > How? rb_list_head_clear() just modifies list->next directly. > > > > > > > > > hopefully despite that it'll actually function as intended. > > > > > > > > Yes ;) > > > > > > I'm curious to what happened. > > > > Ah, this is the first victim of my new 'check sanity of nodes during list walks' patch. > > It's doing the same prev->next next->prev checking as list_add and friends. > > I'm looking at getting it into shape for a 3.12 merge after some other preparatory patches > > go into 3.11 > > So you used the patched kernel when you hit the lockups ? > > What else was changed?
I hit the lockups on the vanilla tree too.
Dave
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