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| author | Jens Axboe <axboe@kernel.dk> | 2012-11-06 12:24:26 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-12-03 12:59:14 -0800 |
| commit | 2d7c6b713f9479a02e4a8e7159dc32ad160c8da7 (patch) | |
| tree | cf99261a0135d3f7e8b541e9fbc30cf2da8518d1 /kernel/futex.c | |
| parent | 38f6449bb781860f9a6b62102e5aea75fe4e7945 (diff) | |
| download | kernel_samsung_smdk4412-2d7c6b713f9479a02e4a8e7159dc32ad160c8da7.zip kernel_samsung_smdk4412-2d7c6b713f9479a02e4a8e7159dc32ad160c8da7.tar.gz kernel_samsung_smdk4412-2d7c6b713f9479a02e4a8e7159dc32ad160c8da7.tar.bz2 | |
dm: fix deadlock with request based dm and queue request_fn recursion
commit a8c32a5c98943d370ea606a2e7dc04717eb92206 upstream.
Request based dm attempts to re-run the request queue off the
request completion path. If used with a driver that potentially does
end_io from its request_fn, we could deadlock trying to recurse
back into request dispatch. Fix this by punting the request queue
run to kblockd.
Tested to fix a quickly reproducible deadlock in such a scenario.
Acked-by: Alasdair G Kergon <agk@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'kernel/futex.c')
0 files changed, 0 insertions, 0 deletions