From: Mel Gorman <mgorman@suse.de>
To: Andrea Arcangeli <aarcange@redhat.com>
Cc: Minchan Kim <minchan.kim@gmail.com>,
akpm@linux-foundation.org, Ury Stankevich <urykhy@gmail.com>,
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
stable@kernel.org
Subject: Re: [PATCH] mm: compaction: Abort compaction if too many pages are isolated and caller is asynchronous
Date: Wed, 1 Jun 2011 18:58:09 +0100 [thread overview]
Message-ID: <20110601175809.GB7306@suse.de> (raw)
In-Reply-To: <20110601005747.GC7019@csn.ul.ie>
On Wed, Jun 01, 2011 at 01:57:47AM +0100, Mel Gorman wrote:
> On Tue, May 31, 2011 at 04:14:02PM +0200, Andrea Arcangeli wrote:
> > On Tue, May 31, 2011 at 10:33:40PM +0900, Minchan Kim wrote:
> > > I checked them before sending patch but I got failed to find strange things. :(
> >
> > My review also doesn't show other bugs in migrate_pages callers like
> > that one.
> >
> > > Now I am checking the page's SwapBacked flag can be changed
> > > between before and after of migrate_pages so accounting of NR_ISOLATED_XX can
> > > make mistake. I am approaching the failure, too. Hmm.
> >
> > When I checked that, I noticed the ClearPageSwapBacked in swapcache if
> > radix insertion fails, but that happens before adding the page in the
> > LRU so it shouldn't have a chance to be isolated.
> >
>
> After hammering three machines for several hours, I managed to trigger
> this once on x86 !CONFIG_SMP CONFIG_PREEMPT HIGHMEM4G (so no PAE)
> and caught the following trace.
>
Umm, HIGHMEM4G implies a two-level pagetable layout so where are
things like _PAGE_BIT_SPLITTING being set when THP is enabled?
--
Mel Gorman
SUSE Labs
WARNING: multiple messages have this Message-ID (diff)
From: Mel Gorman <mgorman@suse.de>
To: Andrea Arcangeli <aarcange@redhat.com>
Cc: Minchan Kim <minchan.kim@gmail.com>,
akpm@linux-foundation.org, Ury Stankevich <urykhy@gmail.com>,
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
stable@kernel.org
Subject: Re: [PATCH] mm: compaction: Abort compaction if too many pages are isolated and caller is asynchronous
Date: Wed, 1 Jun 2011 18:58:09 +0100 [thread overview]
Message-ID: <20110601175809.GB7306@suse.de> (raw)
In-Reply-To: <20110601005747.GC7019@csn.ul.ie>
On Wed, Jun 01, 2011 at 01:57:47AM +0100, Mel Gorman wrote:
> On Tue, May 31, 2011 at 04:14:02PM +0200, Andrea Arcangeli wrote:
> > On Tue, May 31, 2011 at 10:33:40PM +0900, Minchan Kim wrote:
> > > I checked them before sending patch but I got failed to find strange things. :(
> >
> > My review also doesn't show other bugs in migrate_pages callers like
> > that one.
> >
> > > Now I am checking the page's SwapBacked flag can be changed
> > > between before and after of migrate_pages so accounting of NR_ISOLATED_XX can
> > > make mistake. I am approaching the failure, too. Hmm.
> >
> > When I checked that, I noticed the ClearPageSwapBacked in swapcache if
> > radix insertion fails, but that happens before adding the page in the
> > LRU so it shouldn't have a chance to be isolated.
> >
>
> After hammering three machines for several hours, I managed to trigger
> this once on x86 !CONFIG_SMP CONFIG_PREEMPT HIGHMEM4G (so no PAE)
> and caught the following trace.
>
Umm, HIGHMEM4G implies a two-level pagetable layout so where are
things like _PAGE_BIT_SPLITTING being set when THP is enabled?
--
Mel Gorman
SUSE Labs
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next prev parent reply other threads:[~2011-06-01 17:58 UTC|newest]
Thread overview: 126+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-30 13:13 [PATCH] mm: compaction: Abort compaction if too many pages are isolated and caller is asynchronous Mel Gorman
2011-05-30 13:13 ` Mel Gorman
2011-05-30 14:31 ` Andrea Arcangeli
2011-05-30 14:31 ` Andrea Arcangeli
2011-05-30 15:37 ` Mel Gorman
2011-05-30 15:37 ` Mel Gorman
2011-05-30 16:55 ` Mel Gorman
2011-05-30 16:55 ` Mel Gorman
2011-05-30 17:53 ` Andrea Arcangeli
2011-05-30 17:53 ` Andrea Arcangeli
2011-05-31 12:16 ` Minchan Kim
2011-05-31 12:16 ` Minchan Kim
2011-05-31 12:24 ` Andrea Arcangeli
2011-05-31 12:24 ` Andrea Arcangeli
2011-05-31 13:33 ` Minchan Kim
2011-05-31 13:33 ` Minchan Kim
2011-05-31 14:14 ` Andrea Arcangeli
2011-05-31 14:14 ` Andrea Arcangeli
2011-05-31 14:37 ` Minchan Kim
2011-05-31 14:37 ` Minchan Kim
2011-05-31 14:38 ` Minchan Kim
2011-05-31 14:38 ` Minchan Kim
2011-06-02 18:23 ` Andrea Arcangeli
2011-06-02 18:23 ` Andrea Arcangeli
2011-06-02 20:21 ` Minchan Kim
2011-06-02 20:21 ` Minchan Kim
2011-06-02 20:59 ` Minchan Kim
2011-06-02 20:59 ` Minchan Kim
2011-06-02 22:03 ` Andrea Arcangeli
2011-06-02 22:03 ` Andrea Arcangeli
2011-06-02 21:40 ` Andrea Arcangeli
2011-06-02 21:40 ` Andrea Arcangeli
2011-06-02 22:23 ` Minchan Kim
2011-06-02 22:23 ` Minchan Kim
2011-06-02 22:32 ` Andrea Arcangeli
2011-06-02 22:32 ` Andrea Arcangeli
2011-06-02 23:01 ` Minchan Kim
2011-06-02 23:01 ` Minchan Kim
2011-06-03 17:37 ` Andrea Arcangeli
2011-06-03 17:37 ` Andrea Arcangeli
2011-06-03 18:07 ` Andrea Arcangeli
2011-06-03 18:07 ` Andrea Arcangeli
2011-06-04 7:59 ` Minchan Kim
2011-06-04 7:59 ` Minchan Kim
2011-06-06 10:32 ` Mel Gorman
2011-06-06 10:32 ` Mel Gorman
2011-06-06 12:49 ` Andrea Arcangeli
2011-06-06 12:49 ` Andrea Arcangeli
2011-06-06 14:47 ` Mel Gorman
2011-06-06 14:47 ` Mel Gorman
2011-06-06 14:07 ` Minchan Kim
2011-06-06 14:07 ` Minchan Kim
2011-06-06 10:15 ` Mel Gorman
2011-06-06 10:15 ` Mel Gorman
2011-06-06 10:26 ` Mel Gorman
2011-06-06 10:26 ` Mel Gorman
2011-06-06 14:01 ` Minchan Kim
2011-06-06 14:01 ` Minchan Kim
2011-06-06 14:26 ` Minchan Kim
2011-06-06 14:26 ` Minchan Kim
2011-06-02 23:02 ` Minchan Kim
2011-06-02 23:02 ` Minchan Kim
2011-06-01 0:57 ` Mel Gorman
2011-06-01 0:57 ` Mel Gorman
2011-06-01 9:24 ` Mel Gorman
2011-06-01 9:24 ` Mel Gorman
2011-06-01 17:58 ` Mel Gorman [this message]
2011-06-01 17:58 ` Mel Gorman
2011-06-01 19:15 ` Andrea Arcangeli
2011-06-01 19:15 ` Andrea Arcangeli
2011-06-01 21:40 ` Mel Gorman
2011-06-01 21:40 ` Mel Gorman
2011-06-01 23:30 ` Andrea Arcangeli
2011-06-01 23:30 ` Andrea Arcangeli
2011-06-02 1:03 ` Mel Gorman
2011-06-02 1:03 ` Mel Gorman
2011-06-02 8:34 ` Minchan Kim
2011-06-02 8:34 ` Minchan Kim
2011-06-02 13:29 ` Andrea Arcangeli
2011-06-02 13:29 ` Andrea Arcangeli
2011-06-02 14:50 ` Mel Gorman
2011-06-02 14:50 ` Mel Gorman
2011-06-02 15:37 ` Andrea Arcangeli
2011-06-02 15:37 ` Andrea Arcangeli
2011-06-03 2:09 ` Mel Gorman
2011-06-03 2:09 ` Mel Gorman
2011-06-03 14:49 ` Mel Gorman
2011-06-03 14:49 ` Mel Gorman
2011-06-03 15:45 ` Andrea Arcangeli
2011-06-03 15:45 ` Andrea Arcangeli
2011-06-04 7:25 ` Minchan Kim
2011-06-04 7:25 ` Minchan Kim
2011-06-06 10:39 ` Mel Gorman
2011-06-06 10:39 ` Mel Gorman
2011-06-06 12:38 ` Andrea Arcangeli
2011-06-06 12:38 ` Andrea Arcangeli
2011-06-06 14:55 ` Mel Gorman
2011-06-06 14:55 ` Mel Gorman
2011-06-06 14:19 ` Minchan Kim
2011-06-06 14:19 ` Minchan Kim
2011-06-06 22:32 ` Andrew Morton
2011-06-06 22:32 ` Andrew Morton
2011-06-04 6:58 ` Minchan Kim
2011-06-04 6:58 ` Minchan Kim
2011-06-06 10:43 ` Mel Gorman
2011-06-06 10:43 ` Mel Gorman
2011-06-06 12:40 ` Andrea Arcangeli
2011-06-06 12:40 ` Andrea Arcangeli
2011-06-06 13:27 ` Minchan Kim
2011-06-06 13:27 ` Minchan Kim
2011-06-06 13:23 ` Minchan Kim
2011-06-06 13:23 ` Minchan Kim
2011-05-31 14:34 ` Mel Gorman
2011-05-31 14:34 ` Mel Gorman
2011-05-30 14:45 ` [stable] " Greg KH
2011-05-30 14:45 ` Greg KH
2011-05-30 16:14 ` Minchan Kim
2011-05-30 16:14 ` Minchan Kim
2011-05-31 8:32 ` Mel Gorman
2011-05-31 8:32 ` Mel Gorman
2011-05-31 4:48 ` KAMEZAWA Hiroyuki
2011-05-31 4:48 ` KAMEZAWA Hiroyuki
2011-05-31 5:38 ` Minchan Kim
2011-05-31 5:38 ` Minchan Kim
2011-05-31 7:14 ` KOSAKI Motohiro
2011-05-31 7:14 ` KOSAKI Motohiro
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20110601175809.GB7306@suse.de \
--to=mgorman@suse.de \
--cc=aarcange@redhat.com \
--cc=akpm@linux-foundation.org \
--cc=kosaki.motohiro@jp.fujitsu.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=minchan.kim@gmail.com \
--cc=stable@kernel.org \
--cc=urykhy@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.