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| /openbmc/linux/net/ceph/ |
| H A D | osd_client.c | ff513ace Mon Feb 03 05:56:33 CST 2014 Ilya Dryomov <ilya.dryomov@inktank.com> libceph: take map_sem for read in handle_reply()
Handling redirect replies requires both map_sem and request_mutex.
Taking map_sem unconditionally near the top of handle_reply() avoids
possible race conditions that arise from releasing request_mutex to be
able to acquire map_sem in redirect reply case. (Lock ordering is:
map_sem, request_mutex, crush_mutex.)
Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
Reviewed-by: Sage Weil <sage@inktank.com>
ff513ace Mon Feb 03 05:56:33 CST 2014 Ilya Dryomov <ilya.dryomov@inktank.com> libceph: take map_sem for read in handle_reply()
Handling redirect replies requires both map_sem and request_mutex.
Taking map_sem unconditionally near the top of handle_reply() avoids
possible race conditions that arise from releasing request_mutex to be
able to acquire map_sem in redirect reply case. (Lock ordering is:
map_sem, request_mutex, crush_mutex.)
Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
Reviewed-by: Sage Weil <sage@inktank.com>
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