lkml.org 
[lkml]   [2014]   [Mar]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: bad rss-counter message in 3.14rc5
On Mon, Mar 10, 2014 at 09:46:12PM -0700, Andrew Morton wrote:
> On Mon, 10 Mar 2014 20:13:40 -0700 Andrew Morton <akpm@linux-foundation.org> wrote:
>
> > > Anyone ? I'm hitting this trace on an almost daily basis, which is a pain
> > > while trying to reproduce a different bug..
> >
> > Damn, I thought we'd fixed that but it seems not. Cc's added.
> >
> > Guys, what stops the migration target page from coming unlocked in
> > parallel with zap_pte_range()'s call to migration_entry_to_page()?
>
> page_table_lock, sort-of. At least, transitions of is_migration_entry()
> and page_locked() happen under ptl.
>
> I don't see any holes in regular migration. Do you know if this is
> reproducible with CONFIG_NUMA_BALANCING=n or CONFIG_NUMA=n?

CONFIG_NUMA_BALANCING was n already btw, so I'll do a NUMA=n run.

Dave



\
 
 \ /
  Last update: 2014-03-11 06:22    [W:0.129 / U:0.120 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site