From: Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>
To: Minchan Kim <minchan@kernel.org>
Cc: Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>,
Andrew Morton <akpm@linux-foundation.org>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
Vlastimil Babka <vbabka@suse.cz>,
dri-devel@lists.freedesktop.org, Hugh Dickins <hughd@google.com>,
John Einar Reitan <john.reitan@foss.arm.com>,
Jonathan Corbet <corbet@lwn.net>,
Joonsoo Kim <iamjoonsoo.kim@lge.com>,
Konstantin Khlebnikov <koct9i@gmail.com>,
Mel Gorman <mgorman@suse.de>,
Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>,
Rafael Aquini <aquini@redhat.com>, Rik van Riel <riel@redhat.com>,
Sergey Senozhatsky <sergey.senozhatsky@gmail.com>,
virtualization@lists.linux-foundation.org,
Gioh Kim <gi-oh.kim@profitbricks.com>,
Chan Gyun Jeong <chan.jeong@lge.com>,
Sangseok Lee <sangseok.lee@lge.com>,
Kyeongdon Kim <kyeongdon.kim@lge.com>,
Chulmin Kim <cmlaika.kim@samsung.com>
Subject: Re: [PATCH v7 00/12] Support non-lru page migration
Date: Thu, 16 Jun 2016 17:42:11 +0900 [thread overview]
Message-ID: <20160616084211.GA432@swordfish> (raw)
In-Reply-To: <20160616064753.GR17127@bbox>
On (06/16/16 15:47), Minchan Kim wrote:
> > [..]
> > > > this is what I'm getting with the [zsmalloc: keep first object offset in struct page]
> > > > applied: "count:0 mapcount:-127". which may be not related to zsmalloc at this point.
> > > >
> > > > kernel: BUG: Bad page state in process khugepaged pfn:101db8
> > > > kernel: page:ffffea0004076e00 count:0 mapcount:-127 mapping: (null) index:0x1
> > >
> > > Hm, it seems double free.
> > >
> > > It doen't happen if you disable zram? IOW, it seems to be related
> > > zsmalloc migration?
> >
> > need to test more, can't confidently answer now.
> >
> > > How easy can you reprodcue it? Could you bisect it?
> >
> > it takes some (um.. random) time to trigger the bug.
> > I'll try to come up with more details.
>
> Could you revert [1] and retest?
>
> [1] mm/compaction: split freepages without holding the zone lock
ok, so this is not related to zsmalloc. finally manged to reproduce
it. will fork a separate thread.
-ss
next prev parent reply other threads:[~2016-06-16 8:42 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-31 23:21 [PATCH v7 00/12] Support non-lru page migration Minchan Kim
2016-05-31 23:21 ` [PATCH v7 01/12] mm: use put_page to free page instead of putback_lru_page Minchan Kim
2016-05-31 23:21 ` [PATCH v7 02/12] mm: migrate: support non-lru movable page migration Minchan Kim
2016-05-31 23:21 ` [PATCH v7 03/12] mm: balloon: use general non-lru movable page feature Minchan Kim
2016-05-31 23:21 ` [PATCH v7 04/12] zsmalloc: keep max_object in size_class Minchan Kim
2016-05-31 23:21 ` [PATCH v7 05/12] zsmalloc: use bit_spin_lock Minchan Kim
2016-05-31 23:21 ` [PATCH v7 06/12] zsmalloc: use accessor Minchan Kim
2016-05-31 23:21 ` [PATCH v7 07/12] zsmalloc: factor page chain functionality out Minchan Kim
2016-05-31 23:21 ` [PATCH v7 08/12] zsmalloc: introduce zspage structure Minchan Kim
2016-05-31 23:21 ` [PATCH v7 09/12] zsmalloc: separate free_zspage from putback_zspage Minchan Kim
2016-05-31 23:21 ` [PATCH v7 10/12] zsmalloc: use freeobj for index Minchan Kim
2016-05-31 23:21 ` [PATCH v7 11/12] zsmalloc: page migration support Minchan Kim
2016-06-01 14:09 ` Vlastimil Babka
2016-06-02 0:25 ` Minchan Kim
2016-06-02 11:44 ` Vlastimil Babka
2016-06-01 21:39 ` Andrew Morton
2016-06-02 0:15 ` Minchan Kim
2016-05-31 23:21 ` [PATCH v7 12/12] zram: use __GFP_MOVABLE for memory allocation Minchan Kim
2016-06-01 21:41 ` [PATCH v7 00/12] Support non-lru page migration Andrew Morton
2016-06-01 22:40 ` Daniel Vetter
2016-06-02 0:36 ` Minchan Kim
2016-06-15 7:59 ` Sergey Senozhatsky
2016-06-15 23:12 ` Minchan Kim
2016-06-16 2:48 ` Sergey Senozhatsky
2016-06-16 2:58 ` Minchan Kim
2016-06-16 4:23 ` Sergey Senozhatsky
2016-06-16 4:47 ` Minchan Kim
2016-06-16 5:22 ` Sergey Senozhatsky
2016-06-16 6:47 ` Minchan Kim
2016-06-16 8:42 ` Sergey Senozhatsky [this message]
2016-06-16 10:09 ` Minchan Kim
2016-06-17 7:28 ` Joonsoo Kim
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=20160616084211.GA432@swordfish \
--to=sergey.senozhatsky.work@gmail.com \
--cc=akpm@linux-foundation.org \
--cc=aquini@redhat.com \
--cc=chan.jeong@lge.com \
--cc=cmlaika.kim@samsung.com \
--cc=corbet@lwn.net \
--cc=dri-devel@lists.freedesktop.org \
--cc=gi-oh.kim@profitbricks.com \
--cc=hughd@google.com \
--cc=iamjoonsoo.kim@lge.com \
--cc=john.reitan@foss.arm.com \
--cc=koct9i@gmail.com \
--cc=kyeongdon.kim@lge.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=mgorman@suse.de \
--cc=minchan@kernel.org \
--cc=n-horiguchi@ah.jp.nec.com \
--cc=riel@redhat.com \
--cc=sangseok.lee@lge.com \
--cc=sergey.senozhatsky@gmail.com \
--cc=vbabka@suse.cz \
--cc=virtualization@lists.linux-foundation.org \
/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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).