17.06.2013 22:20, Myklebust, Trond пишет:
On Tue, 2013-06-11 at 18:39 +0400, Stanislav Kinsbursky wrote:
Below are races, when RPC client can be created without PiepFS dentries
CPU#0 CPU#1
----------------------------- -----------------------------
rpc_new_client rpc_fill_super
rpc_setup_pipedir
mutex_lock(&sn->pipefs_sb_lock)
rpc_get_sb_net == NULL
(no per-net PipeFS superblock)
sn->pipefs_sb = sb;
notifier_call_chain(MOUNT)
(client is not in the list)
rpc_register_client
(client without pipes dentries)
To fix this patch:
1) makes PipeFS mount notification call with pipefs_sb_lock being held.
2) releases pipefs_sb_lock on new SUNRPC client creation only after
registration.
Signed-off-by: Stanislav Kinsbursky <skinsbur...@parallels.com>
Cc: sta...@vger.kernel.org
Hi Stanislav,
This isn't going to apply to the stable kernels without the cleanup
patch. Could you please reorganise this patch series so that the cleanup
comes last.
Thanks,
Trond
Hello, Trond.
Sure, will do.
--
Best regards,
Stanislav Kinsbursky
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