linux-ext4 - Re: [Bug #13666] WARNING: at mm/page_alloc.c:1743 __alloc_pages

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Message-Id: <200908022226.52228.rjw@sisk.pl>
Date:	Sun, 2 Aug 2009 22:26:51 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Christian Kujau <lists@...dbynature.de>
Cc:	David Rientjes <rientjes@...gle.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-ext4@...r.kernel.org
Subject: Re: [Bug #13666] WARNING: at mm/page_alloc.c:1743 __alloc_pages_nodemask

On Sunday 02 August 2009, Christian Kujau wrote:
> Hm,
> 
> looks like this *is* reproducible. After a reboot, mounting the very 
> same ext4 filesystem triggers this WARNING again:
> 
> [  165.000603] ------------[ cut here ]------------
> [  165.000726] WARNING: at mm/page_alloc.c:1749 __alloc_pages_nodemask+0x4c4/0x5a0()
> [  165.000853] Hardware name: Lenovo          
> [  165.000944] Modules linked in: fuse acpi_cpufreq nfsd lockd nfs_acl auth_rpcgss sunrpc lm75 hwmon b43 usb_storage usb_libusual mac80211 cfg80211 uhci_hcd ehci_hcd tg3 ssb usbcore libphy nls_base
> [  165.002297] Pid: 2789, comm: mount Not tainted 2.6.31-rc4 #1
> [  165.002397] Call Trace:
> [  165.002494]  [<c1036dda>] ? warn_slowpath_common+0x7a/0xc0
> [  165.002601]  [<c1076be4>] ? __alloc_pages_nodemask+0x4c4/0x5a0
> [  165.002708]  [<c1036e40>] ? warn_slowpath_null+0x20/0x40
> [  165.002812]  [<c1076be4>] ? __alloc_pages_nodemask+0x4c4/0x5a0
> [  165.002921]  [<c106dc72>] ? delayacct_end+0xa2/0xd0
> [  165.003027]  [<c1076d41>] ? __get_free_pages+0x21/0x60
> [  165.003132]  [<c11f02bd>] ? match_number+0x3d/0xc0
> [  165.003235]  [<c1129512>] ? parse_options+0xe2/0x5d0
> [  165.003340]  [<c135116b>] ? out_of_line_wait_on_bit+0xbb/0xf0
> [  165.003449]  [<c10c6ff8>] ? __wait_on_buffer+0x28/0x50
> [  165.003552]  [<c112b5b7>] ? ext4_fill_super+0x457/0x2670
> [  165.003657]  [<c11ee136>] ? vsnprintf+0x516/0x820
> [  165.003759]  [<c11e7f1d>] ? kobject_get+0x1d/0x40
> [  165.003865]  [<c10ef5c7>] ? disk_name+0xd7/0xe0
> [  165.003967]  [<c10a37ca>] ? get_sb_bdev+0x15a/0x1a0
> [  165.004107]  [<c112b160>] ? ext4_fill_super+0x0/0x2670
> [  165.004216]  [<c112822d>] ? ext4_get_sb+0x2d/0x50
> [  165.004315]  [<c112b160>] ? ext4_fill_super+0x0/0x2670
> [  165.004419]  [<c10a24f8>] ? vfs_kern_mount+0x58/0xd0
> [  165.004522]  [<c10a2606>] ? do_kern_mount+0x56/0x120
> [  165.004625]  [<c10bb2da>] ? do_mount+0x23a/0x750
> [  165.004727]  [<c10b91c1>] ? copy_mount_options+0x61/0x160
> [  165.004831]  [<c10bb88f>] ? sys_mount+0x9f/0x100
> [  165.004934]  [<c1003304>] ? syscall_call+0x7/0xb
> [  165.005044] ---[ end trace d2227ca6268a916a ]---
> [  165.287930] EXT4-fs (dm-7): barriers enabled
> 
> The whole dmesg and proc/meminfo is at:
> http://nerdbynature.de/bits/2.6.31-rc4/
> 
> Note: "dm-7" is a dm-crypt device, backed by an external disk which is 
> connected via USB. The filesystem itself seems fine however, nothing 
> unusual except this warning so far...

The patches supposed to fix this issue went in right before -rc5 AFAIC.

Can you try to reproduce with -rc5?

Rafael
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