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Bug 605264 - Kernel bug in cfq-iosched merge code
Summary: Kernel bug in cfq-iosched merge code
Keywords:
Status: CLOSED CURRENTRELEASE
Alias: None
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: kernel
Version: 6.0
Hardware: All
OS: Linux
low
medium
Target Milestone: rc
: ---
Assignee: Jeff Moyer
QA Contact: Zhouping Liu
URL: https://bugzilla.kernel.org/show_bug....
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2010-06-17 14:25 UTC by Jeff Moyer
Modified: 2014-01-13 00:00 UTC (History)
5 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2010-11-15 14:25:29 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)

Description Jeff Moyer 2010-06-17 14:25:08 UTC 
Description of problem:

A bug was reported against the upstream kernel that affects RHEL 6.

See the mail here:
http://lkml.org/lkml/2010/6/17/152
Comment 1 RHEL Program Management 2010-06-17 14:33:17 UTC 
This request was evaluated by Red Hat Product Management for inclusion in a Red
Hat Enterprise Linux major release.  Product Management has requested further
review of this request by Red Hat Engineering, for potential inclusion in a Red
Hat Enterprise Linux Major release.  This request is not yet committed for
inclusion.
Comment 2 Jeff Moyer 2010-06-17 15:28:00 UTC 
Reproduced on 2.6.32-36.el6.x86_64.debug:

general protection fault: 0000 [#1] SMP 
last sysfs file: /sys/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/size
CPU 1 
Modules linked in: autofs4(U) sunrpc(U) p4_clockmod(U) freq_table(U) speedstep_lib(U) ip6t_REJECT(U) nf_conntrack_ipv6(U) ip6table_filter(U) ip6_tables(U) ipv6(U) ext3(U) jbd(U) dm_mirror(U) dm_region_hash(U) dm_log(U) sr_mod(U) cdrom(U) serio_raw(U) tg3(U) ipmi_si(U) ipmi_msghandler(U) iTCO_wdt(U) iTCO_vendor_support(U) hpilo(U) shpchp(U) sg(U) i3200_edac(U) edac_core(U) ext4(U) mbcache(U) jbd2(U) dm_multipath(U) sd_mod(U) crc_t10dif(U) qla2xxx(U) scsi_transport_fc(U) pata_acpi(U) ata_generic(U) ata_piix(U) scsi_tgt(U) radeon(U) ttm(U) drm_kms_helper(U) drm(U) i2c_algo_bit(U) i2c_core(U) dm_mod(U) [last unloaded: freq_table]

Modules linked in: autofs4(U) sunrpc(U) p4_clockmod(U) freq_table(U) speedstep_lib(U) ip6t_REJECT(U) nf_conntrack_ipv6(U) ip6table_filter(U) ip6_tables(U) ipv6(U) ext3(U) jbd(U) dm_mirror(U) dm_region_hash(U) dm_log(U) sr_mod(U) cdrom(U) serio_raw(U) tg3(U) ipmi_si(U) ipmi_msghandler(U) iTCO_wdt(U) iTCO_vendor_support(U) hpilo(U) shpchp(U) sg(U) i3200_edac(U) edac_core(U) ext4(U) mbcache(U) jbd2(U) dm_multipath(U) sd_mod(U) crc_t10dif(U) qla2xxx(U) scsi_transport_fc(U) pata_acpi(U) ata_generic(U) ata_piix(U) scsi_tgt(U) radeon(U) ttm(U) drm_kms_helper(U) drm(U) i2c_algo_bit(U) i2c_core(U) dm_mod(U) [last unloaded: freq_table]
Pid: 0, comm: swapper Not tainted 2.6.32-36.el6.x86_64.debug #1 ProLiant DL320 G5p
RIP: 0010:[<ffffffff8126ed28>]  [<ffffffff8126ed28>] cfq_dispatch_requests+0x4f8/0xa40
RSP: 0018:ffff88002c203be0  EFLAGS: 00010096
RAX: 6b6b6b6b6b6b6b6b RBX: ffff88011c7c90b8 RCX: 0000000000000200
RDX: 6b6b6b6b6b6b6b6b RSI: ffff88011c6761c0 RDI: 000000000002a228
RBP: ffff88002c203c40 R08: 000000000002a460 R09: ffff88011c7c90e8
R10: 0000000000000001 R11: 0000000000000006 R12: ffff88011c6761c0
R13: ffff88011c676d70 R14: ffff88011bd0d000 R15: ffff88011ee3f1d8
FS:  0000000000000000(0000) GS:ffff88002c200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0018 ES: 0018 CR0: 000000008005003b
CR2: 00007f72747f2ff8 CR3: 0000000001001000 CR4: 00000000000006e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process swapper (pid: 0, threadinfo ffff88012282a000, task ffff88012282c240)
Stack:
 ffff88002c203c50 0000000000000046 0000000000000000 0000000000000282
<0> ffff880000000001 0000000000000000 0000000000000000 ffff88011c6d2000
<0> ffff88011c370f20 ffff88002c203c58 ffff88011bd0d000 ffff88011ee3f1d8
Call Trace:
 <IRQ> 
 [<ffffffff8125ac02>] blk_peek_request+0x132/0x1f0
 [<ffffffff81507f3e>] ? _spin_lock_irq+0x6e/0x80
 [<ffffffff813719ab>] scsi_request_fn+0x6b/0x5d0
 [<ffffffff8125b678>] __blk_run_queue+0x78/0x150
 [<ffffffff8125b830>] blk_run_queue+0x30/0x50
 [<ffffffff81370f4a>] scsi_run_queue+0xda/0x3c0
 [<ffffffff8136ab80>] ? __scsi_put_command+0x60/0xa0
 [<ffffffff813721b2>] scsi_next_command+0x42/0x60
 [<ffffffff81372f7e>] scsi_io_completion+0x35e/0x550
 [<ffffffff81369f22>] scsi_finish_command+0xc2/0x130
 [<ffffffff813732dd>] scsi_softirq_done+0x14d/0x170
 [<ffffffff8126059d>] blk_done_softirq+0x8d/0xa0
 [<ffffffff81076525>] __do_softirq+0xd5/0x220
 [<ffffffff810a953d>] ? trace_hardirqs_off+0xd/0x10
 [<ffffffff8101438c>] call_softirq+0x1c/0x30
 [<ffffffff8101606d>] do_softirq+0xad/0xe0
 [<ffffffff81076115>] irq_exit+0x95/0xa0
 [<ffffffff8102efd5>] smp_call_function_single_interrupt+0x35/0x40
 [<ffffffff81013ef3>] call_function_single_interrupt+0x13/0x20
 <EOI> 
 [<ffffffff8101be99>] ? mwait_idle+0x79/0xe0
 [<ffffffff8101be90>] ? mwait_idle+0x70/0xe0
 [<ffffffff81011e9b>] cpu_idle+0xbb/0x110
 [<ffffffff814fda11>] start_secondary+0x20b/0x24e
Code: 89 e6 48 89 df e8 19 d4 ff ff 48 85 c0 49 89 c5 0f 84 d1 02 00 00 49 83 bc 24 e0 00 00 00 00 75 b6 eb 08 49 39 d4 74 af 48 89 d0 <48> 8b 90 e0 00 00 00 48 85 d2 75 ec 41 8b 14 24 41 2b 54 24 6c 
RIP  [<ffffffff8126ed28>] cfq_dispatch_requests+0x4f8/0xa40
 RSP <ffff88002c203be0>
---[ end trace 0bc608aafcdc23db ]---
Comment 4 Aristeu Rozanski 2010-07-01 16:24:08 UTC 
Patch(es) available on kernel-2.6.32-42.el6
Comment 15 releng-rhel@redhat.com 2010-11-15 14:25:29 UTC 
Red Hat Enterprise Linux 6.0 is now available and should resolve
the problem described in this bug report. This report is therefore being closed
with a resolution of CURRENTRELEASE. You may reopen this bug report if the
solution does not work for you.
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