Re: [BUG] lockup with the latest kernel
From: Steven Rostedt
Date: Tue Sep 08 2009 - 22:29:20 EST
On Fri, 2009年08月28日 at 14:33 -0400, Steven Rostedt wrote:
>
On 2009年8月28日, Steven Rostedt wrote:
>
> On 2009年8月27日, Linus Torvalds wrote:
>
> > > ...
>
> > > >> [13288.222084] EIP: 0060:[<c0110821>] EFLAGS: 00000002 CPU: 0
>
> > > >> [13288.222084] EIP is at default_send_IPI_mask_logical+0x53/0x92
>
> >
>
> > Is this one perhaps fixed by b04e6373d694 ("x86: don't call
>
> > '->send_IPI_mask()' with an empty mask")
>
> >
>
> > It sounds a _lot_ like that bug. Older dual-cpu x86 box, and APIC getting
>
> > confused by the occasional empty CPU mask, and then subsequent IPI's will
>
> > hang.
>
>
>
> I'll update my box to that kernel and see what happens and let you know.
>
>
I checked out the commit at b04e6373d694, compiled and booted that kernel.
>
So far, so good. It survived logging into a gnome session (sometimes locks
>
up there), and a full kernel compile (usually locks up there too). But
>
there's been rare times that it would take days before hitting the bug.
>
>
I'll keep it in this kernel for a while and if it lasts the week, I'll
>
consider it fixed. This box acts as my email, dhcp and web server, as well
>
as one of the boxes in my distcc farm, thus it gets a bit of use. It will
>
not be idle during this time period.
Just an update.
The box currently has an uptime of 11 days. I have not hit the bug at
all, and it has survived numerous compiles (both locally and as a distcc
server). It has been serving up my email and web pages without a hitch.
I'd say that commit fixed the bug. (knock on wood).
-- Steve
(or it could have been the penguins:
http://rostedt.homelinux.com/gallery2/main.php?g2_itemId=7860 )
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