lkml.org 
[lkml]   [2008]   [Mar]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: 2.6.25-rc: complete lockup on boot/start of X (bisected)
From
Date
On Sun, 2008-03-23 at 19:46 +0100, Marcin Slusarz wrote:

> 4 different lockups:
> http://alan.umcs.lublin.pl/~mslusarz/kernel/2008.03.23-lockup/

Brilliant, these are extremely helpful.

What seems to happen is a classic xtime deadlock, doing a xtime
seq_readlock while holding a seq_writelock.

Only need to figure out _why_ that is happening....

> Are there any downsides of using nmi_watchdog=2 all the time?

Some machines are said to not boot due to NMIs, hence the default is
off, but afaik, _if_ it works there are no downsides aside from the
slight NMI handling overhead.

> ps: Documentation/nmi_watchdog.txt says: "Currently, local APIC mode
> (nmi_watchdog=2) does not work on x86-64.". It's not true, so maybe someone
> should update this file?

Care to send a patch to the x86 maintainers? :-)



\
 
 \ /
  Last update: 2008-03-23 20:09    [W:0.048 / U:2.284 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site