[LU-4555] Patched (LU-2779) 2.4.1 Lustre Clients still crashing with LBUG

• Type: Bug
• Resolution: Fixed
• Priority: Major
• Affects Version/s: Lustre 2.4.1
• Severity: 2
• Assignee: Zhenyu Xu
• Reporter: Oz Rentas (Inactive)

Description

Customer has applied patch from LU-2779 to 2.4.1 clients.

We've verified the patch has been applied:

diff -ru /usr/src/lustre-2.4.1/lustre/osc/osc_cache.c ./lustre/osc/osc_cache.c
— /usr/src/lustre-2.4.1/lustre/osc/osc_cache.c 2013-09-19 11:06:59.000000000 -0700
+++ ./lustre/osc/osc_cache.c 2013-12-18 06:52:09.000000000 -0800
@@ -896,7 +896,7 @@
"%s: wait ext to %d timedout, recovery in progress?\n",
osc_export(obj)>exp_obd>obd_name, state);

• lwi = LWI_INTR(LWI_ON_SIGNAL_NOOP, NULL);
  + lwi = LWI_INTR(NULL, NULL);
  rc = l_wait_event(ext->oe_waitq, extent_wait_cb(ext, state),
  &lwi);
  }

And, the client RPMs have been rebuilt and installed. However, the Lustre clients are still failing with the following error:

LustreError: 17450:0:(cl_lock.c:1964:discard_cb()) ASSERTION( (!(page->cp_type == CPT_CACHEABLE) || (!PageWriteback(cl_page_vmpage(env, page)))) ) failed:
LustreError: 17450:0:(cl_lock.c:1964:discard_cb()) LBUG Kernel panic - not syncing: LBUG
Pid: 17450, comm: tar Tainted: GF

The patched RPM is attached. Please advise.

Issue Links

• is related to: LU-4581 ASSERTION( (!(page->cp_type == CPT_CACHEABLE) || (!PageWriteback(cl_page_vmpage(env, page)))) ) failed: