[LU-6666] osc_brw_prep_request()) ASSERTION( page_count == 1 || (ergo(i == 0, poff + pg->count == PAGE_CACHE_SIZE)

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.8.0
• Affects Version/s: Lustre 2.8.0
• Severity: 3
• Assignee: Jinshan Xiong (Inactive)
• Reporter: Di Wang

Description

I met this during racer. This looks like LU-6227, but not in directIO patch.

 
VFS: Error -28 occurred while creating quota.
VFS: Error -28 occurred while creating quota.
VFS: Error -28 occurred while creating quota.
VFS: Error -28 occurred while creating quota.
VFS: Error -28 occurred while creating quota.
VFS: Error -28 occurred while creating quota.
VFS: Error -28 occurred while creating quota.
VFS: Error -28 occurred while creating quota.
VFS: Error -28 occurred while creating quota.
VFS: Error -28 occurred while creating quota.
VFS: Error -28 occurred while creating quota.
LustreError: 19811:0:(osc_request.c:1101:osc_brw_prep_request()) ASSERTION( page_count == 1 || (ergo(i == 0, poff + pg->count == PAGE_CACHE_SIZE) && ergo(i > 0 && i < page_count - 1, poff == 0 && pg->count == PAGE_CACHE_SIZE) && ergo(i == page_count - 1, poff == 0)) ) failed: i: 6/27 pg: ffff8801efd6d640 off: 24576, count: 3272
LustreError: 19811:0:(osc_request.c:1101:osc_brw_prep_request()) LBUG
Pid: 19811, comm: ptlrpcd_4

Call Trace:
 [<ffffffffa116b875>] libcfs_debug_dumpstack+0x55/0x80 [libcfs]
 [<ffffffffa116be77>] lbug_with_loc+0x47/0xb0 [libcfs]
 [<ffffffffa08a4b55>] osc_brw_prep_request+0xc35/0x10a0 [osc]
 [<ffffffffa08b4471>] ? osc_req_attr_set+0x1b1/0x740 [osc]
 [<ffffffffa08a5859>] osc_build_rpc+0x899/0x15c0 [osc]
 [<ffffffffa08c0eda>] osc_io_unplug0+0x115a/0x1b40 [osc]
 [<ffffffffa08b9a83>] ? osc_ap_completion+0x213/0x600 [osc]
 [<ffffffffa156d8bb>] ? lu_object_put+0x12b/0x310 [obdclass]
 [<ffffffffa08c3e61>] osc_io_unplug+0x11/0x20 [osc]
 [<ffffffffa08a746f>] brw_interpret+0x9bf/0x1fa0 [osc]
 [<ffffffffa060eadc>] ? ptlrpc_free_committed+0x56c/0x770 [ptlrpc]
 [<ffffffffa061bdb2>] ? ptlrpc_unregister_bulk+0xa2/0xac0 [ptlrpc]
 [<ffffffffa0610772>] ? after_reply+0xcb2/0xeb0 [ptlrpc]
 [<ffffffffa0614ab1>] ptlrpc_check_set+0x331/0x1c70 [ptlrpc]
 [<ffffffff81087fdb>] ? try_to_del_timer_sync+0x7b/0xe0
 [<ffffffffa0642393>] ptlrpcd_check+0x533/0x550 [ptlrpc]
 [<ffffffffa06429cb>] ptlrpcd+0x35b/0x430 [ptlrpc]
 [<ffffffff81064b90>] ? default_wake_function+0x0/0x20
 [<ffffffffa0642670>] ? ptlrpcd+0x0/0x430 [ptlrpc]
 [<ffffffff8109e66e>] kthread+0x9e/0xc0
 [<ffffffff8100c20a>] child_rip+0xa/0x20
 [<ffffffff8109e5d0>] ? kthread+0x0/0xc0
 [<ffffffff8100c200>] ? child_rip+0x0/0x20

Issue Links

• is related to: LU-6776 osc_request.c:1670:osc_build_rpc()) ASSERTION( oap->oap_page_off + oap->oap_brw_page.count == ((1UL) << 12) ) failed
• is related to: LU-6227 Master testing: (osc_request.c:1219:osc_brw_prep_request()) ASSERTION( i == 0 || pg->off > pg_prev->off)