Hi Davidlohr,
We noticed LTP test failures
ltp.msgget02.1.TFAIL
ltp.semget02.2.TFAIL
ltp.semget02.3.TFAIL
and the first bad commit is
commit 5769cf6355d87f63906b3e51887eff7017c39217
Author: Davidlohr Bueso <davidl...@hp.com>
AuthorDate: Wed Jan 15 16:56:01 2014 +1100
Commit: Stephen Rothwell <s...@canb.auug.org.au>
CommitDate: Wed Jan 15 16:56:01 2014 +1100
ipc: share ids rwsem when possible in ipcget_public
... and rewrite the function. For scenarios where the key is found and
we end up just doing different routinary checks, we can downgrade the
ids->rwsem and share it among concurrent readers. These checks include
the following, which are all safe to share the lock:
ops->more_checks() >> sem_more_checks(), shm_more_checks()
ipc_check_perms() >> ipcperms(),ops->associate() >>
[lsm]_[ipctype]_associate()
Signed-off-by: Davidlohr Bueso <davidl...@hp.com>
Cc: Aswin Chandramouleeswaran <as...@hp.com>
Cc: Rik van Riel <r...@redhat.com>
Cc: Manfred Spraul <manf...@colorfullife.com>
Signed-off-by: Andrew Morton <a...@linux-foundation.org>
ipc/util.c | 60 +++++++++++++++++++++++++++++++++---------------------------
1 file changed, 33 insertions(+), 27 deletions(-)
Thanks,
Fengguang
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