Date:	Fri, 7 Jun 2013 10:31:54 +0800
From:	Fengguang Wu <fengguang.wu@...el.com>
To:	Lars Ellenberg <lars.ellenberg@...bit.com>
Cc:	Philipp Reisner <philipp.reisner@...bit.com>,
	drbd-user@...ts.linbit.com, linux-kernel@...r.kernel.org
Subject: [drbd?] Kernel panic - not syncing: Out of memory and no killable
 processes...

Greetings,

My "kvm -m 256" reliably goes Out Of Memory after this commit.  It may
not be the only one that eats up the memory, however I wonder how much
memory consumption this commit added? Thanks!

commit 23361cf32b58efdf09945a64e1d8d41fa6117157
Author: Lars Ellenberg <lars.ellenberg@...bit.com>
Date:   Thu Mar 31 16:36:43 2011 +0200

    drbd: get rid of bio_split, allow bios of "arbitrary" size
    
    Where "arbitrary" size is currently 1 MiB, which is the BIO_MAX_SIZE
    for architectures with 4k PAGE_CACHE_SIZE (most).
    
    Signed-off-by: Philipp Reisner <philipp.reisner@...bit.com>
    Signed-off-by: Lars Ellenberg <lars.ellenberg@...bit.com>

[    9.458297] osst :I: Tape driver with OnStream support version 0.99.4
[    9.458297] osst :I: $Id: osst.c,v 1.73 2005/01/01 21:13:34 wriede Exp $
[    9.497666] swapper invoked oom-killer: gfp_mask=0x2d2, order=0, oom_score_adj=0
[    9.508104] CPU: 0 PID: 1 Comm: swapper Not tainted 3.10.0-rc4-00279-g81d9042 #7
[    9.515344] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2007
[    9.520406]  ffff88000d8b0560 ffff88000d8abb98 ffffffff81c6877d ffff88000d8abc38
[    9.528736]  ffffffff81c493f8 0000000000000036 000000000000bd44 ffff88000d8abbc8
[    9.540233]  ffffffff810b95b3 ffff88000d8abbf8 ffffffff810b969d ffff880004e73da8
[    9.548608] Call Trace:
[    9.551717]  [<ffffffff81c6877d>] dump_stack+0x19/0x1b
[    9.556395]  [<ffffffff81c493f8>] dump_header.isra.12+0x6d/0x23a
[    9.561364]  [<ffffffff810b95b3>] ? put_lock_stats.isra.18+0xe/0x28
[    9.565767]  [<ffffffff810b969d>] ? lock_release_holdtime.part.19+0xd0/0xd8
[    9.570484]  [<ffffffff810fa72e>] out_of_memory+0x25f/0x2cd
[    9.577443]  [<ffffffff810fa5fa>] ? out_of_memory+0x12b/0x2cd
[    9.582370]  [<ffffffff81c75ee2>] ? _raw_spin_unlock+0x58/0x65
[    9.587474]  [<ffffffff810fe35f>] __alloc_pages_nodemask+0x6da/0x8b9
[    9.592914]  [<ffffffff81122229>] __vmalloc_node_range+0x119/0x1cd
[    9.598151]  [<ffffffff826f8c43>] ? scsi_debug_init+0x162/0x7f9
[    9.603408]  [<ffffffff81122312>] __vmalloc_node+0x35/0x37
[    9.608376]  [<ffffffff826f8c43>] ? scsi_debug_init+0x162/0x7f9
[    9.613614]  [<ffffffff81122360>] vmalloc+0x2a/0x2c
[    9.618125]  [<ffffffff826f8c43>] scsi_debug_init+0x162/0x7f9
[    9.627300]  [<ffffffff81791d62>] ? scsi_register_driver+0x16/0x18
[    9.632654]  [<ffffffff826f8ae1>] ? ses_init+0x3c/0x3c
[    9.637981]  [<ffffffff826acdec>] do_one_initcall+0xe9/0x1aa
[    9.647683]  [<ffffffff826acfa1>] kernel_init_freeable+0xf4/0x183
[    9.658099]  [<ffffffff826ac6ba>] ? do_early_param+0x8c/0x8c
[    9.663348]  [<ffffffff81c41ba3>] ? rest_init+0xc7/0xc7
[    9.671711]  [<ffffffff81c41bb1>] kernel_init+0xe/0xd1
[    9.678330]  [<ffffffff81c7741a>] ret_from_fork+0x7a/0xb0
[    9.684293]  [<ffffffff81c41ba3>] ? rest_init+0xc7/0xc7
[    9.689178] Mem-Info:
[    9.692235] DMA per-cpu:

git bisect start v3.8 v3.7 --
git bisect good dadfab4873256d2145640c0ce468fcbfb48977fe  #    10  2013-06-06 20:03:02  Merge tag 'firewire-updates' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394
git bisect  bad 992956189de58cae9f2be40585bc25105cd7c5ad  #     0  2013-06-06 20:12:04  efi: Fix the build with user namespaces enabled.
git bisect good 2b8318881ddbcb67c5e8d2178b42284749442222  #    10  2013-06-06 20:18:06  Merge tag 'fbdev-for-3.8' of git://gitorious.org/linux-omap-dss2/linux
git bisect good 3c2e81ef344a90bb0a39d84af6878b4aeff568a2  #    10  2013-06-06 20:28:58  Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux
git bisect  bad 009ba89db5ae836949009f97a00abb96feba69f4  #     0  2013-06-06 20:32:47  drbd: fix schedule in atomic
git bisect good 85f75dd7630436b0aa46a6393099c0f23121f5f0  #    10  2013-06-06 20:38:02  drbd: introduce in-kernel "down" command
git bisect good 49ba9b1bb3295fa690ae8f5091b093e61acf3ada  #    10  2013-06-06 20:43:45  drbd: Remove useless error messages
git bisect  bad 0db55363cb1e6cfe2bedecb7e47c05f8992c612e  #     0  2013-06-06 20:47:27  drbd: Rename drbd_alloc_ee() to drbd_alloc_peer_req()
git bisect  bad 8e0af25fa85c9efe393128b0a0dd874981edb22f  #     0  2013-06-06 20:51:41  drbd: Moved susp, susp_nod and susp_fen to the connection object
git bisect good 2bf896213d4faa7289316663f5e8e0bc35d80abf  #    10  2013-06-06 21:10:13  drbd: drbd_connect(): Initialize struct drbd_socket before sending anything
git bisect good 181286ad22bf9bfb85de625e8501285de5261b35  #    10  2013-06-06 21:33:27  drbd: preparation commit, pass drbd_interval to drbd_al_begin/complete_io
git bisect  bad e15766e9c94f7fa3396eff4ffbbf30dea8c0e22a  #     0  2013-06-06 21:47:39  drbd: improvements to activate/deactivate multiple activity log extents
git bisect  bad 23361cf32b58efdf09945a64e1d8d41fa6117157  #     0  2013-06-06 22:09:21  drbd: get rid of bio_split, allow bios of "arbitrary" size
git bisect good 7726547e67a1fda0d12e1de5ec917a2e5d4b8186  #    10  2013-06-06 22:20:16  drbd: prepare to activate two activity log extents at once
git bisect good 7726547e67a1fda0d12e1de5ec917a2e5d4b8186  #    30  2013-06-06 22:24:49  drbd: prepare to activate two activity log extents at once
git bisect  bad 81d904298000f4c82977575165b72af3d68e49b3  #     0  2013-06-06 22:25:03  Merge remote-tracking branch 'drm-intel/drm-intel-nightly' into devel-xian-x86_64-201306061718
git bisect  bad 4e1e7059d375482daeeda395bba2939679b1ee14  #     0  2013-06-06 22:30:29  Add linux-next specific files for 20130606

Thanks,
Fengguang

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