linux-kernel - Re: [BUG] infinite loop in find_get

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Date:	Thu, 15 Sep 2011 12:47:12 +0200
From:	Pawel Sikora <pluto@...k.net>
To:	Lin Ming <mlin@...pku.edu.cn>
Cc:	Andrew Morton <akpm@...gle.com>,
	Eric Dumazet <eric.dumazet@...il.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Toshiyuki Okajima <toshi.okajima@...fujitsu.com>,
	Dave Chinner <david@...morbit.com>,
	Hugh Dickins <hughd@...gle.com>,
	Justin Piszcz <jpiszcz@...idpixels.com>
Subject: Re: [BUG] infinite loop in find_get_pages()

On Wednesday 14 of September 2011 08:34:21 Lin Ming wrote:

> [3.0.2-stable] BUG: soft lockup - CPU#13 stuck for 22s! [kswapd2:1092]
> http://marc.info/?l=linux-kernel&m=131469584117857&w=2

Hi,

i'm not sure that this is fully related to this thread but i've found
new warnings about memory pages in dmesg today:

[650697.716481] ------------[ cut here ]------------
[650697.716498] WARNING: at mm/page-writeback.c:1176 __set_page_dirty_nobuffers+0x10a/0x140()
[650697.716501] Hardware name: H8DGU
[650697.716502] Modules linked in: nfs fscache binfmt_misc nfsd lockd nfs_acl auth_rpcgss sunrpc ipmi_si ipmi_devintf ipmi_msghandler sch_sfq iptable_nat nf_nat nf_conntrack_ipv4 
nf_conntrack nf_defrag_ipv4 iptable_filter xt_TCPMSS xt_tcpudp iptable_mangle ip_tables ip6table_filter ip6_tables x_tables ext4 jbd2 crc16 raid10 raid0 dm_mod uvesafb autofs4 
dummy aoe joydev usbhid hid ide_cd_mod cdrom ata_generic pata_acpi pata_atiixp sp5100_tco ohci_hcd ide_pci_generic ssb ehci_hcd pcmcia igb pcmcia_core psmouse mmc_core evdev 
i2c_piix4 atiixp ide_core k10temp usbcore amd64_edac_mod edac_core i2c_core dca hwmon edac_mce_amd ghes serio_raw button hed processor pcspkr sg sd_mod crc_t10dif raid1 md_mod ext3 
jbd mbcache ahci libahci libata scsi_mod [last unloaded: scsi_wait_scan]
[650697.716569] Pid: 16806, comm: m_xilinx Not tainted 3.0.4 #5
[650697.716572] Call Trace:
[650697.716582]  [<ffffffff810470da>] warn_slowpath_common+0x7a/0xb0
[650697.716586]  [<ffffffff81047125>] warn_slowpath_null+0x15/0x20
[650697.716590]  [<ffffffff810e71ba>] __set_page_dirty_nobuffers+0x10a/0x140
[650697.716596]  [<ffffffff81127eb8>] migrate_page_copy+0x1c8/0x1d0
[650697.716600]  [<ffffffff81127ef5>] migrate_page+0x35/0x50
[650697.716623]  [<ffffffffa04b6f19>] nfs_migrate_page+0x59/0xf0 [nfs]
[650697.716627]  [<ffffffff81127fb9>] move_to_new_page+0xa9/0x260
[650697.716630]  [<ffffffff811286bd>] migrate_pages+0x3fd/0x4c0
[650697.716635]  [<ffffffff8142988e>] ? apic_timer_interrupt+0xe/0x20
[650697.716641]  [<ffffffff8111cbf0>] ? ftrace_define_fields_mm_compaction_isolate_template+0x70/0x70
[650697.716645]  [<ffffffff8111d5da>] compact_zone+0x52a/0x8c0
[650697.716649]  [<ffffffff8111dade>] compact_zone_order+0x7e/0xb0
[650697.716653]  [<ffffffff8111dbcd>] try_to_compact_pages+0xbd/0xf0
[650697.716657]  [<ffffffff810e5148>] __alloc_pages_direct_compact+0xa8/0x180
[650697.716661]  [<ffffffff810e588d>] __alloc_pages_nodemask+0x66d/0x7f0
[650697.716667]  [<ffffffff8110a92d>] ? page_add_new_anon_rmap+0x9d/0xb0
[650697.716671]  [<ffffffff8111b865>] alloc_pages_vma+0x95/0x180
[650697.716676]  [<ffffffff8112c2f8>] do_huge_pmd_anonymous_page+0x138/0x310
[650697.716680]  [<ffffffff81102ace>] handle_mm_fault+0x21e/0x310
[650697.716685]  [<ffffffff81424bed>] do_page_fault+0x11d/0x4e0
[650697.716688]  [<ffffffff811077a7>] ? do_mmap_pgoff+0x357/0x370
[650697.716692]  [<ffffffff8110790d>] ? sys_mmap_pgoff+0x14d/0x220
[650697.716697]  [<ffffffff811371b8>] ? do_sys_open+0x168/0x1d0
[650697.716701]  [<ffffffff81421d5f>] page_fault+0x1f/0x30
[650697.716704] ---[ end trace 4255de435c6def21 ]---

BR,
Paweł.

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