[PATCH] blk: unplug later
get_request_wait needn't unplug the device immediately. Signed-off-by: Nick Piggin <nickpiggin@yahoo.com.au> Cc: Jens Axboe <axboe@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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@ -1969,7 +1969,6 @@ static struct request *get_request_wait(request_queue_t *q, int rw)
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DEFINE_WAIT(wait);
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struct request *rq;
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generic_unplug_device(q);
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do {
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struct request_list *rl = &q->rq;
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@ -1981,6 +1980,7 @@ static struct request *get_request_wait(request_queue_t *q, int rw)
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if (!rq) {
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struct io_context *ioc;
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generic_unplug_device(q);
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io_schedule();
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/*
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