lkml.org 
[lkml]   [2013]   [Jun]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] mm: fix up a spurious page fault whenever it happens
On 19.06.2013 07:20, Linus Torvalds wrote:

>> No crash in 2 days running with preempt none...
>
> Is this UP?

Yes it is.

> There's the fast_tlb race that Peter fixed in commit 29eb77825cc7
> ("arch, mm: Remove tlb_fast_mode()"). I'm not seeing how it would
> cause infinite TLB faults, but it definitely causes potentially
> incoherent TLB contents. And afaik it only happens with
> CONFIG_PREEMPT, and on UP systems. Which sounds like it might match
> your setup...

Oh, thank you for the pointer, this indeed looks interesting.

Unfortunately the patch massively does not apply to 3.4 which
I am using and I know too little what all is involved here
to backport it. I will test it when (if) it gets to the 3.4(-rt)
(or when I find some spare time to play with the newer kernel
on that system).

Thanks
--
Stano



\
 
 \ /
  Last update: 2013-06-19 10:01    [W:0.102 / U:0.208 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site