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authorJens Axboe <jens.axboe@oracle.com>2008-05-29 09:35:22 +0200
committerJens Axboe <jens.axboe@oracle.com>2008-07-03 13:21:12 +0200
commit863fddcb4b0caee4c2d5bd6e3b28779920516db3 (patch)
tree9170df5fb0e26d77d45017069b7756f7c80afde5 /Documentation
parent9a11b4ed0e7c44bca7c939aa544c3c47aae40c12 (diff)
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as-iosched: properly protect ioc_gone and ioc count
If we have multiple tasks freeing io contexts when as-iosched is being unloaded, we could complete() ioc_gone twice. Fix that by protecting ioc_gone complete() and clearing with a spinlock for just that purpose. Doesn't matter from a performance perspective, since it'll only enter that path when ioc_gone != NULL (when as-iosched is being rmmod'ed). Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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