[LU-3843] osc_completion()) ASSERTION( (!!(page->cp_state == CPS_PAGEOUT) == !!(cmd == 0x02))

• Type: Bug
• Resolution: Cannot Reproduce
• Priority: Major
• Fix Version/s: Lustre 2.6.0
• Environment: Sequoia login node. PPC64. 48 core Power 7. Lustre version [2.4.0-RC2_11chaos|https://github.com/chaos/lustre/tree/2.4.0-RC2_11chaos]
• Severity: 3
• Assignee: Niu Yawei (Inactive)
• Reporter: Christopher Morrone

Description

Using Lustre version 2.4.0-RC2_11chaos, we hit the following assertion on a login node (lustre client):

osc_cache.c:1267:osc_completion()) ASSERTION( (!!(page->cp_state == CPS_PAGEOUT) == !!(cmd == 0x02) ) failed:

The backtrace looks roughly like this:

osc_ap_compltion
osc_extent_finish
brw_interpret
ptlrpc_check_set
ptlrpcd_check
ptlrpcd

There was not much going on in the client's log. About one minute earlier an OSC lost connection to one of the OSTs and then reconnected. But that is a fairly common occurance. It is not immediately obvious to me that there is a connection to this assertion.

This client is a Power7 login node with 48 cores and 64GB of RAM.