Hello Joseph and Junxiao, Did you encounter this issue in the past? I doubt this is possible a race condition bug (rather than data inconsistency).
Thanks Gang >>> > Hello Guys, > > I got a bug, which reported a kernel BUG in function ocfs2_truncate_file, > Base on my initial analysis, this bug looks like a race condition problem. > Unfortunately, there was no kernel crash dump caught, just got some kernel > log as below, > > kernel BUG at /usr/src/packages/BUILD/ocfs2-1.6/default/ocfs2/file.c:466! > Oct 21 13:02:19 uii316 [ 1766.831230] Supported: Yes > Oct 21 13:02:19 uii316 [ 1766.831234] > Oct 21 13:02:19 uii316 [ 1766.831238] Pid: 7134, comm: saposcol Not tainted > 3.0.101-0.47.67-default #1 > Oct 21 13:02:19 uii316 HP ProLiant BL460c G1 > Oct 21 13:02:19 uii316 > Oct 21 13:02:19 uii316 [ 1766.831247] RIP: 0010:[<ffffffffa0744b95>] > Oct 21 13:02:19 uii316 [<ffffffffa0744b95>] ocfs2_truncate_file+0xa5/0x490 > [ocfs2] > Oct 21 13:02:19 uii316 [ 1766.831312] RSP: 0018:ffff880f39d79b68 EFLAGS: > 00010296 > Oct 21 13:02:19 uii316 [ 1766.831321] RAX: 000000000000008f RBX: > ffff880f39c5e240 RCX: 00000000000039fd > Oct 21 13:02:19 uii316 [ 1766.831326] RDX: 0000000000000000 RSI: > 0000000000000007 RDI: 0000000000000246 > Oct 21 13:02:19 uii316 [ 1766.831331] RBP: 1000000000000000 R08: > ffffffff81da0ac0 R09: 0000000000000000 > Oct 21 13:02:19 uii316 [ 1766.831336] R10: 0000000000000003 R11: > 00000000ffffffff R12: ffff880f3949bc78 > Oct 21 13:02:19 uii316 [ 1766.831342] R13: ffff880f39c5e888 R14: > ffff880f3d481000 R15: 00000000000e43bc > Oct 21 13:02:19 uii316 [ 1766.831347] FS: 00007f11cda9d720(0000) > GS:ffff880fefd40000(0000) knlGS:0000000000000000 > Oct 21 13:02:19 uii316 [ 1766.831353] CS: 0010 DS: 0000 ES: 0000 CR0: > 0000000080050033 > Oct 21 13:02:19 uii316 [ 1766.831358] CR2: 00007f11cdad4000 CR3: > 0000000f39d35000 CR4: 00000000000007e0 > Oct 21 13:02:19 uii316 [ 1766.831363] DR0: 0000000000000000 DR1: > 0000000000000000 DR2: 0000000000000000 > Oct 21 13:02:19 uii316 [ 1766.831368] DR3: 0000000000000000 DR6: > 00000000ffff0ff0 DR7: 0000000000000400 > Oct 21 13:02:19 uii316 [ 1766.831374] Process saposcol (pid: 7134, > threadinfo ffff880f39d78000, task ffff880f39c5e240) > Oct 21 13:02:19 uii316 [ 1766.831379] Stack: > Oct 21 13:02:19 uii316 [ 1766.831383] 000000000002433c > Oct 21 13:02:19 uii316 00000000000e43bc > Oct 21 13:02:19 uii316 00000000000eab40 > Oct 21 13:02:19 uii316 ffff880f00000001 > Oct 21 13:02:19 uii316 > Oct 21 13:02:19 uii316 [ 1766.831397] ffff880f394956e0 > Oct 21 13:02:19 uii316 ffff880f8e0d1000 > Oct 21 13:02:19 uii316 ffff880f3949b800 > Oct 21 13:02:19 uii316 0000000000000000 > Oct 21 13:02:19 uii316 > Oct 21 13:02:19 uii316 [ 1766.831410] ffff880f39454980 > Oct 21 13:02:19 uii316 0000000000000001 > Oct 21 13:02:19 uii316 000000000002433c > Oct 21 13:02:19 uii316 0000000000000008 > Oct 21 13:02:19 uii316 > Oct 21 13:02:19 uii316 [ 1766.831423] Call Trace: > Oct 21 13:02:19 uii316 [ 1766.831492] [<ffffffffa074742e>] > ocfs2_setattr+0x26e/0xa90 [ocfs2] > Oct 21 13:02:19 uii316 [ 1766.831522] [<ffffffff81178faf>] > notify_change+0x19f/0x2f0 > Oct 21 13:02:19 uii316 [ 1766.831534] [<ffffffff8115d517>] > do_truncate+0x57/0x80 > Oct 21 13:02:19 uii316 [ 1766.831544] [<ffffffff8116c053>] > do_last+0x603/0x800 > Oct 21 13:02:19 uii316 [ 1766.831551] [<ffffffff8116ceb9>] > path_openat+0xd9/0x420 > Oct 21 13:02:19 uii316 [ 1766.831558] [<ffffffff8116d33c>] > do_filp_open+0x4c/0xc0 > Oct 21 13:02:19 uii316 [ 1766.831566] [<ffffffff8115de5f>] > do_sys_open+0x17f/0x250 > Oct 21 13:02:19 uii316 [ 1766.831575] [<ffffffff8146e1f2>] > system_call_fastpath+0x16/0x1b > Oct 21 13:02:19 uii316 [ 1766.831588] [<00007f11ccb07080>] 0x7f11ccb0707f > Oct 21 13:02:19 uii316 [ 1766.831592] Code: > > The source code in question is as below, > 444 static int ocfs2_truncate_file(struct inode *inode, > 445 struct buffer_head *di_bh, > 446 u64 new_i_size) > 447 { > 448 int status = 0; > 449 struct ocfs2_dinode *fe = NULL; > 450 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); > 451 > 452 /* We trust di_bh because it comes from ocfs2_inode_lock(), > which > 453 * already validated it */ > 454 fe = (struct ocfs2_dinode *) di_bh->b_data; > 455 > 456 trace_ocfs2_truncate_file((unsigned long > long)OCFS2_I(inode)->ip_blkno, > 457 (unsigned long > long)le64_to_cpu(fe->i_size), > 458 (unsigned long long)new_i_size); > 459 > 460 mlog_bug_on_msg(le64_to_cpu(fe->i_size) != i_size_read(inode), > > <<= here > 461 "Inode %llu, inode i_size = %lld != di " > 462 "i_size = %llu, i_flags = 0x%x\n", > 463 (unsigned long long)OCFS2_I(inode)->ip_blkno, > 464 i_size_read(inode), > 465 (unsigned long long)le64_to_cpu(fe->i_size), > 466 le32_to_cpu(fe->i_flags)); > 467 > > If your encountered the similar issue in the past, please let me know, to > see if there is any patch/discussion for this bug. > > Thanks a lot. > Gang > > > > > _______________________________________________ > Ocfs2-devel mailing list > Ocfs2-devel@oss.oracle.com > https://oss.oracle.com/mailman/listinfo/ocfs2-devel _______________________________________________ Ocfs2-devel mailing list Ocfs2-devel@oss.oracle.com https://oss.oracle.com/mailman/listinfo/ocfs2-devel