From 219eeac841fb8fd70b73bec9c986c2d0044faf92 Mon Sep 17 00:00:00 2001 From: Alexander Boyko Date: Wed, 4 May 2016 10:28:53 -0400 Subject: [PATCH] staging: lustre: osc: Allow lock to be canceled at ENQ time A cl_lock can be canceled when it's in CLS_ENQUEUED state. We can't unuse this kind of lock in lov_lock_unuse() because it will bring this lock into CLS_NEW state and then confuse osc_lock_upcall(). Add a regression test case by Alexander Boyko. Signed-off-by: Jinshan Xiong Signed-off-by: Alexander Boyko Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-3889 Reviewed-on: http://review.whamcloud.com/8405 Reviewed-by: Bobi Jam Reviewed-by: Oleg Drokin Signed-off-by: James Simmons Signed-off-by: Greg Kroah-Hartman --- drivers/staging/lustre/lustre/include/obd_support.h | 1 + drivers/staging/lustre/lustre/osc/osc_request.c | 3 +++ 2 files changed, 4 insertions(+) diff --git a/drivers/staging/lustre/lustre/include/obd_support.h b/drivers/staging/lustre/lustre/include/obd_support.h index 1358af1..60034d3 100644 --- a/drivers/staging/lustre/lustre/include/obd_support.h +++ b/drivers/staging/lustre/lustre/include/obd_support.h @@ -321,6 +321,7 @@ extern char obd_jobid_var[]; #define OBD_FAIL_LDLM_AGL_DELAY 0x31a #define OBD_FAIL_LDLM_AGL_NOLOCK 0x31b #define OBD_FAIL_LDLM_OST_LVB 0x31c +#define OBD_FAIL_LDLM_ENQUEUE_HANG 0x31d /* LOCKLESS IO */ #define OBD_FAIL_LDLM_SET_CONTENTION 0x385 diff --git a/drivers/staging/lustre/lustre/osc/osc_request.c b/drivers/staging/lustre/lustre/osc/osc_request.c index df06f4f..47417f8 100644 --- a/drivers/staging/lustre/lustre/osc/osc_request.c +++ b/drivers/staging/lustre/lustre/osc/osc_request.c @@ -2201,6 +2201,9 @@ static int osc_enqueue_interpret(const struct lu_env *env, */ ldlm_lock_addref(lockh, mode); + /* Let cl_lock_state_wait fail with -ERESTARTSYS to unuse sublocks. */ + OBD_FAIL_TIMEOUT(OBD_FAIL_LDLM_ENQUEUE_HANG, 2); + /* Let CP AST to grant the lock first. */ OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_CP_ENQ_RACE, 1); -- 2.7.4