We have a script that forks a bunch of children (up to ten) and runs some transformations on images. Since upgrading from 2.6.22-r9 to 2.6.23-r8 we have noticed soft lockups, such as: BUG: soft lockup - CPU#1 stuck for 11s! [watchdirectory:21493] Pid: 21493, comm: watchdirectory EIP: 0060:[<c039f78b>] CPU: 1 EIP is at __write_lock_failed+0x7/0x1c EFLAGS: 00200287 Tainted: G D (2.6.23-gentoo-r8 #1) EAX: c0570410 EBX: f6c6f6c0 ECX: c057049c EDX: f6c6f6ec ESI: f74845c0 EDI: dc9e7eb2 EBP: f7b0d740 DS: 007b ES: 007b FS: 00d8 CR0: 8005003b CR2: b7d396cb CR3: 303fd000 CR4: 000006d0 DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000 DR6: ffff0ff0 DR7: 00000400 [<c039fa5e>] _write_lock+0xe/0x10 [<c01fc55d>] cifs_create+0x32d/0x680 [<c01fc230>] cifs_create+0x0/0x680 [<c0169ae3>] vfs_create+0x93/0xd0 [<c016c9e7>] open_namei+0x577/0x5d0 [<c016064e>] do_filp_open+0x2e/0x60 [<c016031f>] get_unused_fd_flags+0x4f/0xc0 [<c01606cc>] do_sys_open+0x4c/0xf0 [<c01607ac>] sys_open+0x1c/0x20 [<c0103b2e>] sysenter_past_esp+0x5f/0x85 ======================= Reproducible: Always
How easy is it to reproduce? Can you post the script? Can you reproduce it on 2.6.24? Can you reproduce it on a filesystem other than CIFS? Is this a local or network based CIFS mount?
One more thing, can you reproduce it on an untainted kernel?
It happened several times in one night, but has not happened since. I can't reproduce it at the moment, the script is not able to be posted, and the problem only occurs with CIFS. So we can close for the moment I think.. How is our kernel tainted? VMware perhaps?
Yes, vmware would taint your kernel. If this is not reproducible then I'll close this for now.
