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SubjectRe: [patch] HT scheduler, sched-2.5.59-D7
Ingo wrote:

>--- linux/fs/pipe.c.orig 2003-01-20 19:28:43.000000000 +0100
>+++ linux/fs/pipe.c 2003-01-20 22:58:35.000000000 +0100
>@@ -117,7 +117,7 @@
> up(PIPE_SEM(*inode));
> /* Signal writers asynchronously that there is more room. */
> if (do_wakeup) {
>- wake_up_interruptible(PIPE_WAIT(*inode));
>+ wake_up_interruptible_sync(PIPE_WAIT(*inode));
> kill_fasync(PIPE_FASYNC_WRITERS(*inode), SIGIO, POLL_OUT);
> }
> if (ret > 0)
>
What's the purpose of this change?
I thought that the _sync functions should be called if it's guaranteed
that schedule() will be called immediately, i.e. if the scheduler should
not rebalance.
You've added _sync() to the codepaths that lead to the end of the syscall.

--
Manfred

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