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authorJeff Moyer <jmoyer@redhat.com>2007-10-16 23:27:20 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-10-17 08:42:53 -0700
commit41d10da3717409de33d5441f2f6d8f072ab3fbb6 (patch)
tree4822afef881132248a7c91ba6eb33065f3209f2b
parentc17ac85504efec5f3a9b0c5b05bffd6f30e5b655 (diff)
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aio: account I/O wait time properly
Some months back I proposed changing the schedule() call in read_events to an io_schedule(): http://osdir.com/ml/linux.kernel.aio.general/2006-10/msg00024.html This was rejected as there are AIO operations that do not initiate disk I/O. I've had another look at the problem, and the only AIO operation that will not initiate disk I/O is IOCB_CMD_NOOP. However, this command isn't even wired up! Given that it doesn't work, and hasn't for *years*, I'm going to suggest again that we do proper I/O accounting when using AIO. Signed-off-by: Jeff Moyer <jmoyer@redhat.com> Acked-by: Zach Brown <zach.brown@oracle.com> Cc: Benjamin LaHaise <bcrl@kvack.org> Cc: Suparna Bhattacharya <suparna@in.ibm.com> Cc: Badari Pulavarty <pbadari@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--fs/aio.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/fs/aio.c b/fs/aio.c
index ea2e198..d02f43b 100644
--- a/fs/aio.c
+++ b/fs/aio.c
@@ -303,7 +303,7 @@ static void wait_for_all_aios(struct kioctx *ctx)
set_task_state(tsk, TASK_UNINTERRUPTIBLE);
while (ctx->reqs_active) {
spin_unlock_irq(&ctx->ctx_lock);
- schedule();
+ io_schedule();
set_task_state(tsk, TASK_UNINTERRUPTIBLE);
spin_lock_irq(&ctx->ctx_lock);
}
@@ -323,7 +323,7 @@ ssize_t fastcall wait_on_sync_kiocb(struct kiocb *iocb)
set_current_state(TASK_UNINTERRUPTIBLE);
if (!iocb->ki_users)
break;
- schedule();
+ io_schedule();
}
__set_current_state(TASK_RUNNING);
return iocb->ki_user_data;
@@ -1170,7 +1170,7 @@ retry:
ret = 0;
if (to.timed_out) /* Only check after read evt */
break;
- schedule();
+ io_schedule();
if (signal_pending(tsk)) {
ret = -EINTR;
break;