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 14:22:09 +0900 [thread overview]
Message-ID: <20160616052209.GB516@swordfish> (raw)
In-Reply-To: <20160616044710.GP17127@bbox>
On (06/16/16 13:47), 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.
-ss
> > kernel: flags: 0x8000000000000000()
> > kernel: page dumped because: nonzero mapcount
> > kernel: Modules linked in: lzo zram zsmalloc mousedev coretemp hwmon crc32c_intel snd_hda_codec_realtek i2c_i801 snd_hda_codec_generic r8169 mii snd_hda_intel snd_hda_codec snd_hda_core acpi_cpufreq snd_pcm snd_timer snd soundcore lpc_ich processor mfd_core sch_fq_codel sd_mod hid_generic usb
> > kernel: CPU: 3 PID: 38 Comm: khugepaged Not tainted 4.7.0-rc3-next-20160615-dbg-00005-gfd11984-dirty #491
> > kernel: 0000000000000000 ffff8801124c73f8 ffffffff814d69b0 ffffea0004076e00
> > kernel: ffffffff81e658a0 ffff8801124c7420 ffffffff811e9b63 0000000000000000
> > kernel: ffffea0004076e00 ffffffff81e658a0 ffff8801124c7440 ffffffff811e9ca9
> > kernel: Call Trace:
> > kernel: [<ffffffff814d69b0>] dump_stack+0x68/0x92
> > kernel: [<ffffffff811e9b63>] bad_page+0x158/0x1a2
> > kernel: [<ffffffff811e9ca9>] free_pages_check_bad+0xfc/0x101
> > kernel: [<ffffffff811ee516>] free_hot_cold_page+0x135/0x5de
> > kernel: [<ffffffff811eea26>] __free_pages+0x67/0x72
> > kernel: [<ffffffff81227c63>] release_freepages+0x13a/0x191
> > kernel: [<ffffffff8122b3c2>] compact_zone+0x845/0x1155
> > kernel: [<ffffffff8122ab7d>] ? compaction_suitable+0x76/0x76
> > kernel: [<ffffffff8122bdb2>] compact_zone_order+0xe0/0x167
> > kernel: [<ffffffff8122bcd2>] ? compact_zone+0x1155/0x1155
> > kernel: [<ffffffff8122ce88>] try_to_compact_pages+0x2f1/0x648
> > kernel: [<ffffffff8122ce88>] ? try_to_compact_pages+0x2f1/0x648
> > kernel: [<ffffffff8122cb97>] ? compaction_zonelist_suitable+0x3a6/0x3a6
> > kernel: [<ffffffff811ef1ea>] ? get_page_from_freelist+0x2c0/0x133c
> > kernel: [<ffffffff811f0350>] __alloc_pages_direct_compact+0xea/0x30d
> > kernel: [<ffffffff811f0266>] ? get_page_from_freelist+0x133c/0x133c
> > kernel: [<ffffffff811ee3b2>] ? drain_all_pages+0x1d6/0x205
> > kernel: [<ffffffff811f21a8>] __alloc_pages_nodemask+0x143d/0x16b6
> > kernel: [<ffffffff8111f405>] ? debug_show_all_locks+0x226/0x226
> > kernel: [<ffffffff811f0d6b>] ? warn_alloc_failed+0x24c/0x24c
> > kernel: [<ffffffff81110ffc>] ? finish_wait+0x1a4/0x1b0
> > kernel: [<ffffffff81122faf>] ? lock_acquire+0xec/0x147
> > kernel: [<ffffffff81d32ed0>] ? _raw_spin_unlock_irqrestore+0x3b/0x5c
> > kernel: [<ffffffff81d32edc>] ? _raw_spin_unlock_irqrestore+0x47/0x5c
> > kernel: [<ffffffff81110ffc>] ? finish_wait+0x1a4/0x1b0
> > kernel: [<ffffffff8128f73a>] khugepaged+0x1d4/0x484f
> > kernel: [<ffffffff8128f566>] ? hugepage_vma_revalidate+0xef/0xef
> > kernel: [<ffffffff810d5bcc>] ? finish_task_switch+0x3de/0x484
> > kernel: [<ffffffff81d32f18>] ? _raw_spin_unlock_irq+0x27/0x45
> > kernel: [<ffffffff8111d13f>] ? trace_hardirqs_on_caller+0x3d2/0x492
> > kernel: [<ffffffff81111487>] ? prepare_to_wait_event+0x3f7/0x3f7
> > kernel: [<ffffffff81d28bf5>] ? __schedule+0xa4d/0xd16
> > kernel: [<ffffffff810cd0de>] kthread+0x252/0x261
> > kernel: [<ffffffff8128f566>] ? hugepage_vma_revalidate+0xef/0xef
> > kernel: [<ffffffff810cce8c>] ? kthread_create_on_node+0x377/0x377
> > kernel: [<ffffffff81d3387f>] ret_from_fork+0x1f/0x40
> > kernel: [<ffffffff810cce8c>] ? kthread_create_on_node+0x377/0x377
> > -- Reboot --
next prev parent reply other threads:[~2016-06-16 5:22 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 [this message]
2016-06-16 6:47 ` Minchan Kim
2016-06-16 8:42 ` Sergey Senozhatsky
2016-06-16 10:09 ` Minchan Kim
2016-06-17 7:28 ` Joonsoo Kim
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