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Bug 675310

Summary: BUG: soft lockup during NFS client I/O
Product: Red Hat Enterprise Linux 6 Reporter: Corey Marthaler <cmarthal>
Component: kernelAssignee: Jeff Layton <jlayton>
Status: CLOSED DUPLICATE QA Contact: Filesystem QE <fs-qe>
Severity: medium Docs Contact:
Priority: medium    
Version: 6.0CC: bfields, jlayton, kevin.constantine, kzhang, lhh, rwheeler, sprabhu, steved
Target Milestone: rc   
Target Release: ---   
Hardware: x86_64   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2011-05-02 18:46:15 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description Corey Marthaler 2011-02-04 21:01:26 UTC 
Description of problem:
I saw this on an NFS client running I/O while attempt to test HA NFS server relocation.

BUG: soft lockup - CPU#0 stuck for 61s! [xdoio:27174]
Modules linked in: nfs lockd fscache nfs_acl auth_rpcgss sunrpc ipv6 dm_mirror dm_region_hash dm_log virtio_balloon virtio_net i2c_piix4 i2c_core sg ext4 mbcache jbd2 sd_mod crc_t10dif virtio_pci virtio_ring virtio pata_acpi ata_generic ata_piix dm_mod [last unloaded: speedstep_lib]
CPU 0:
Modules linked in: nfs lockd fscache nfs_acl auth_rpcgss sunrpc ipv6 dm_mirror dm_region_hash dm_log virtio_balloon virtio_net i2c_piix4 i2c_core sg ext4 mbcache jbd2 sd_mod crc_t10dif virtio_pci virtio_ring virtio pata_acpi ata_generic ata_piix dm_mod [last unloaded: speedstep_lib]
Pid: 27174, comm: xdoio Not tainted 2.6.32-71.el6.x86_64 #1 KVM
RIP: 0010:[<ffffffff814caa87>]  [<ffffffff814caa87>] _spin_unlock_irqrestore+0x17/0x20
RSP: 0018:ffff88003b6759f8  EFLAGS: 00000202
RAX: 0000000000000202 RBX: ffff88003b6759f8 RCX: 0000000000000000
RDX: ffff880001cbdcc8 RSI: 0000000000000202 RDI: 0000000000000202
RBP: ffffffff81013c8e R08: ffff880001cbdcd0 R09: ffacfd1b30a08407
R10: ffff8800020a11c0 R11: 0000000000000001 R12: 0000000000000002
R13: ffff880038a7baa8 R14: ffff88003d016880 R15: ffff88003c1a7780
FS:  00007f2b379bf700(0000) GS:ffff880001e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: 0000003e7b21e9d0 CR3: 000000003ad17000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 [<ffffffff81091eae>] ? prepare_to_wait_exclusive+0x4e/0x80
 [<ffffffff814c9138>] ? __wait_on_bit_lock+0x48/0xc0
 [<ffffffff8113e6fc>] ? page_mkclean+0x1c/0x210
 [<ffffffffa02ba560>] ? nfs_wait_bit_killable+0x0/0x40 [nfs]
 [<ffffffff814c9228>] ? out_of_line_wait_on_bit_lock+0x78/0x90
 [<ffffffff81091ce0>] ? wake_bit_function+0x0/0x50
 [<ffffffffa02c7c9a>] ? nfs_commit_inode+0xaa/0x1c0 [nfs]
 [<ffffffffa02c7e29>] ? nfs_wb_page+0x79/0xd0 [nfs]
 [<ffffffffa02b68de>] ? nfs_launder_page+0x4e/0x80 [nfs]
 [<ffffffff811233c6>] ? invalidate_inode_pages2_range+0x2f6/0x380
 [<ffffffff81123467>] ? invalidate_inode_pages2+0x17/0x20
 [<ffffffffa02baa48>] ? nfs_revalidate_mapping+0x128/0x170 [nfs]
 [<ffffffffa02b7897>] ? nfs_file_read+0x77/0x130 [nfs]
 [<ffffffff8116c65a>] ? do_sync_read+0xfa/0x140
 [<ffffffff81091ca0>] ? autoremove_wake_function+0x0/0x40
 [<ffffffff8120bf4b>] ? selinux_file_permission+0xfb/0x150
 [<ffffffff811ff3b6>] ? security_file_permission+0x16/0x20
 [<ffffffff8116d085>] ? vfs_read+0xb5/0x1a0
 [<ffffffff810d40a2>] ? audit_syscall_entry+0x272/0x2a0
 [<ffffffff8116d1c1>] ? sys_read+0x51/0x90
 [<ffffffff81013172>] ? system_call_fastpath+0x16/0x1b



Version-Release number of selected component (if applicable):
[root@flea-10 ~]# uname -ar
Linux flea-10 2.6.32-71.el6.x86_64 #1 SMP Wed Sep 1 01:33:01 EDT 2010 x86_64 x86_64 x86_64 GNU/Linux
Comment 1 RHEL Program Management 2011-04-04 02:38:44 UTC 
Since RHEL 6.1 External Beta has begun, and this bug remains
unresolved, it has been rejected as it is not proposed as
exception or blocker.

Red Hat invites you to ask your support representative to
propose this request, if appropriate and relevant, in the
next release of Red Hat Enterprise Linux.
Comment 2 Jeff Layton 2011-05-02 18:46:15 UTC 
Almost certainly a duplicate of bug 672305. Please retest with a more recent kernel and reopen if this problem reappears.

*** This bug has been marked as a duplicate of bug 672305 ***