lkml.org 
[lkml]   [2014]   [Sep]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] perf, x86: Fall back to vmalloc for BTS buffer allocation
On Wed, Sep 10, 2014 at 04:40:12PM +0200, Andi Kleen wrote:
> > We did this once, and that blew up big time.
> >
> > Even now, vmalloc_fault() has a very explicit:
> >
> > WARN_ON_ONCE(in_nmi());
> >
> > So this isn't going to happen until you fix that.
>
> Good point.
>
> We just need to call vmalloc_sync_all at allocation time,
> no need to change vmalloc_fault.

Somehow that wasn't considered adequate, but lemme try and dig out that
thread. It should be somewhere...

https://lkml.org/lkml/2010/7/14/465




\
 
 \ /
  Last update: 2014-09-10 19:01    [W:0.059 / U:1.056 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site