atom feed60 messages in org.freebsd.freebsd-currentRe: zfs: Fatal trap 12: page fault wh...
FromSent OnAttachments
Juergen UngerJul 27, 2009 12:24 am 
O. HartmannJul 27, 2009 12:58 pm 
Juergen UngerJul 27, 2009 2:33 pm 
Andriy GaponJul 28, 2009 2:50 am 
Pawel Jakub DawidekJul 29, 2009 1:47 am 
Thomas BackmanJul 29, 2009 3:31 am 
Andriy GaponJul 29, 2009 4:21 am 
Andriy GaponJul 29, 2009 4:41 am 
Thomas BackmanJul 29, 2009 5:45 am 
Andriy GaponJul 29, 2009 6:03 am 
Thomas BackmanJul 29, 2009 6:23 am 
Andriy GaponJul 29, 2009 6:45 am 
Thomas BackmanJul 29, 2009 6:52 am 
Andriy GaponJul 29, 2009 6:55 am 
Thomas BackmanJul 29, 2009 7:10 am 
Andriy GaponJul 29, 2009 7:35 am 
Andriy GaponJul 29, 2009 9:01 am 
Thomas BackmanJul 29, 2009 9:10 am 
Thomas BackmanJul 29, 2009 10:13 am 
Andriy GaponJul 29, 2009 10:17 am 
Thomas BackmanJul 29, 2009 11:03 am 
Thomas BackmanJul 29, 2009 1:14 pm 
Pawel Jakub DawidekJul 29, 2009 2:17 pm 
Thomas BackmanJul 30, 2009 12:04 am 
Andriy GaponJul 30, 2009 5:11 am 
Thomas BackmanJul 30, 2009 5:51 am 
Andriy GaponJul 30, 2009 6:13 am 
Thomas BackmanJul 30, 2009 6:31 am 
Andriy GaponJul 30, 2009 6:34 am 
Andriy GaponJul 30, 2009 7:24 am 
Thomas BackmanJul 30, 2009 7:39 am 
Andriy GaponJul 30, 2009 7:45 am 
Andriy GaponJul 30, 2009 7:48 am 
Thomas BackmanJul 30, 2009 8:25 am 
Andriy GaponJul 30, 2009 8:39 am 
Thomas BackmanJul 30, 2009 9:41 am 
Thomas BackmanJul 30, 2009 11:29 am 
Andriy GaponJul 30, 2009 11:41 am 
Thomas BackmanJul 31, 2009 2:04 am 
James R. Van ArtsdalenJul 31, 2009 4:44 am 
Thomas BackmanJul 31, 2009 5:26 am 
Thomas BackmanJul 31, 2009 10:09 am 
Tim KientzleAug 1, 2009 10:11 am 
Juergen UngerAug 2, 2009 2:26 am 
Pawel Jakub DawidekAug 2, 2009 2:29 am 
Juergen UngerAug 3, 2009 1:32 pm 
Pawel Jakub DawidekAug 4, 2009 12:33 am 
Juergen UngerAug 4, 2009 12:53 am 
Pawel Jakub DawidekAug 4, 2009 2:49 am 
Juergen UngerAug 4, 2009 2:56 am 
Pawel Jakub DawidekAug 4, 2009 12:50 pm 
Thomas BackmanAug 4, 2009 1:10 pm 
Pawel Jakub DawidekAug 4, 2009 1:25 pm 
Pawel Jakub DawidekAug 4, 2009 11:49 pm 
Thomas BackmanAug 5, 2009 12:08 am 
Thomas BackmanAug 5, 2009 12:20 am 
Pawel Jakub DawidekAug 5, 2009 2:37 am 
Thomas BackmanAug 5, 2009 3:36 am 
Thomas BackmanAug 5, 2009 5:06 am 
Pawel Jakub DawidekAug 6, 2009 10:44 pm 
Subject:Re: zfs: Fatal trap 12: page fault while in kernel mode
From:Thomas Backman (sere@exscape.org)
Date:Jul 29, 2009 9:10:42 am
List:org.freebsd.freebsd-current

On Jul 29, 2009, at 18:02, Andriy Gapon wrote:

on 29/07/2009 17:36 Andriy Gapon said the following:

on 29/07/2009 17:10 Thomas Backman said the following: [snip]

(kgdb) fr 11 [snip] (kgdb) p *sx $8 = {lock_object = {lo_name = 0xffffffff80b5634c "zp->z_lock", lo_flags = 40894464 [0x2700000, btw], lo_data = 0, lo_witness = 0x0}, sx_lock = 6}

... as you might notice, I'm mostly clueless as to what I'm doing here. :o Hope that helps (a bit), though.

Yes, it does and a lot. sx_lock = 6 means that this sx lock is destroyed: #define SX_LOCK_DESTROYED \ (SX_LOCK_SHARED_WAITERS | SX_LOCK_EXCLUSIVE_WAITERS)

And lo_name tells that this is zp->z_lock. This lock is destroyed in zfs_znode_cache_destructor. Not enough knowledge for me to proceed further.

So I guess that this is a case when zfs_znode_delete() was called on znode that was still referenced from some vnode. When the vnode gets reclaimed we get this problem. Could you please examine vp in frame 15 or 16?

-- Andriy Gapon

Sure. Lots of info in that one:

(kgdb) fr 15 #15 0xffffffff803c839e in vgonel (vp=0xffffff0009252588) at vnode_if.h: 830 830 in vnode_if.h (kgdb) p *vp $3 = {v_type = VDIR, v_tag = 0xffffffff80b56347 "zfs", v_op = 0xffffffff80b5af00, v_data = 0xffffff00090d5000, v_mount = 0xffffff0002cd7bc0, v_nmntvnodes = {tqe_next = 0xffffff00090f5000, tqe_prev = 0xffffff0009252960}, v_un = {vu_mount = 0x0, vu_socket = 0x0, vu_cdev = 0x0, vu_fifoinfo = 0x0, vu_yield = 0}, v_hashlist = { le_next = 0x0, le_prev = 0x0}, v_hash = 0, v_cache_src = {lh_first = 0x0}, v_cache_dst = {tqh_first = 0x0, tqh_last = 0xffffff00092525e8}, v_cache_dd = 0x0, v_cstart = 0, v_lasta = 0, v_lastw = 0, v_clen = 0, v_lock = { lock_object = {lo_name = 0xffffffff80b56347 "zfs", lo_flags = 91947008, lo_data = 0, lo_witness = 0x0}, lk_lock = 18446742974952890368, lk_timo = 51, lk_pri = 80}, v_interlock = {lock_object = { lo_name = 0xffffffff806126d9 "vnode interlock", lo_flags = 16973824, lo_data = 0, lo_witness = 0x0}, mtx_lock = 4}, v_vnlock = 0xffffff0009252620, v_holdcnt = 1, v_usecount = 0, v_iflag = 128, v_vflag = 0, v_writecount = 0, v_freelist = {tqe_next = 0xffffff00090c3760, tqe_prev = 0xffffff002c0bfc18}, v_bufobj = { bo_mtx = {lock_object = {lo_name = 0xffffffff806126e9 "bufobj interlock", lo_flags = 16973824, lo_data = 0, lo_witness = 0x0}, mtx_lock = 4}, bo_clean = {bv_hd = {tqh_first = 0x0, tqh_last = 0xffffff00092526c0}, bv_root = 0x0, bv_cnt = 0}, bo_dirty = {bv_hd = {tqh_first = 0x0, tqh_last = 0xffffff00092526e0}, bv_root = 0x0, bv_cnt = 0}, bo_numoutput = 0, bo_flag = 0, bo_ops = 0xffffffff8079afa0, bo_bsize = 131072, bo_object = 0x0, bo_synclist = {le_next = 0x0, le_prev = 0x0}, bo_private = 0xffffff0009252588, __bo_vnode = 0xffffff0009252588}, v_pollinfo = 0x0, v_label = 0x0, v_lockf = 0x0}

Regards, Thomas

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