Messages in this thread | | | Date | Tue, 11 Mar 2014 00:51:09 -0400 | From | Dave Jones <> | Subject | Re: 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
| |