[lustre-devel] [PATCH 24/35] staging: lustre: osc: osc_extent should hold refcount to osc_object
James Simmons
jsimmons at infradead.org
Thu Nov 10 09:30:54 PST 2016
From: Jinshan Xiong <jinshan.xiong at intel.com>
To avoid a race that osc_extent and osc_object destroy happens on the
same time, which causes kernel crash.
Signed-off-by: Jinshan Xiong <jinshan.xiong at intel.com>
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-7164
Reviewed-on: http://review.whamcloud.com/16433
Reviewed-by: John L. Hammond <john.hammond at intel.com>
Reviewed-by: Patrick Farrell <paf at cray.com>
Reviewed-by: Oleg Drokin <oleg.drokin at intel.com>
Signed-off-by: James Simmons <jsimmons at infradead.org>
---
drivers/staging/lustre/lustre/osc/osc_cache.c | 2 ++
1 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/drivers/staging/lustre/lustre/osc/osc_cache.c b/drivers/staging/lustre/lustre/osc/osc_cache.c
index d17ec32..0ca01b1 100644
--- a/drivers/staging/lustre/lustre/osc/osc_cache.c
+++ b/drivers/staging/lustre/lustre/osc/osc_cache.c
@@ -360,6 +360,7 @@ static void osc_extent_state_set(struct osc_extent *ext, int state)
RB_CLEAR_NODE(&ext->oe_node);
ext->oe_obj = obj;
+ cl_object_get(osc2cl(obj));
atomic_set(&ext->oe_refc, 1);
atomic_set(&ext->oe_users, 0);
INIT_LIST_HEAD(&ext->oe_link);
@@ -398,6 +399,7 @@ static void osc_extent_put(const struct lu_env *env, struct osc_extent *ext)
LDLM_LOCK_PUT(ext->oe_dlmlock);
ext->oe_dlmlock = NULL;
}
+ cl_object_put(env, osc2cl(ext->oe_obj));
osc_extent_free(ext);
}
}
--
1.7.1
More information about the lustre-devel
mailing list