On Tue, Sep 25, 2012 at 02:39:31PM -0700, Andrew Morton wrote:
> On Tue, 25 Sep 2012 17:13:27 +0900
> Minchan Kim wrote:
>
> > I see. To me, your saying is better than current comment.
> > I hope comment could be more explicit.
> >
> > diff --git a/mm/compaction.c b/mm/compaction.c
> > index df0
On Tue, Sep 25, 2012 at 02:39:31PM -0700, Andrew Morton wrote:
> On Tue, 25 Sep 2012 17:13:27 +0900
> Minchan Kim wrote:
>
> > I see. To me, your saying is better than current comment.
> > I hope comment could be more explicit.
> >
> > diff --git a/mm/compaction.c b/mm/compaction.c
> > index df0
On Tue, 25 Sep 2012 17:13:27 +0900
Minchan Kim wrote:
> I see. To me, your saying is better than current comment.
> I hope comment could be more explicit.
>
> diff --git a/mm/compaction.c b/mm/compaction.c
> index df01b4e..f1d2cc7 100644
> --- a/mm/compaction.c
> +++ b/mm/compaction.c
> @@ -542,
On Tue, Sep 25, 2012 at 08:51:05AM +0100, Mel Gorman wrote:
> On Tue, Sep 25, 2012 at 04:05:17PM +0900, Minchan Kim wrote:
> > Hi Mel,
> >
> > I have a question below.
> >
> > On Fri, Sep 21, 2012 at 11:46:19AM +0100, Mel Gorman wrote:
> > > Compactions migrate scanner acquires the zone->lru_lock
On Tue, Sep 25, 2012 at 04:05:17PM +0900, Minchan Kim wrote:
> Hi Mel,
>
> I have a question below.
>
> On Fri, Sep 21, 2012 at 11:46:19AM +0100, Mel Gorman wrote:
> > Compactions migrate scanner acquires the zone->lru_lock when scanning a
> > range
> > of pages looking for LRU pages to acquire.
Hi Mel,
I have a question below.
On Fri, Sep 21, 2012 at 11:46:19AM +0100, Mel Gorman wrote:
> Compactions migrate scanner acquires the zone->lru_lock when scanning a range
> of pages looking for LRU pages to acquire. It does this even if there are
> no LRU pages in the range. If multiple process
On Fri, Sep 21, 2012 at 11:46:19AM +0100, Mel Gorman wrote:
> Compactions migrate scanner acquires the zone->lru_lock when scanning a range
> of pages looking for LRU pages to acquire. It does this even if there are
> no LRU pages in the range. If multiple processes are compacting then this
> can c
Compactions migrate scanner acquires the zone->lru_lock when scanning a range
of pages looking for LRU pages to acquire. It does this even if there are
no LRU pages in the range. If multiple processes are compacting then this
can cause severe locking contention. To make matters worse commit b2eef8c
