wake_up_interruptible() and _sync() calls are reversed in pipe_read().
The attached patches only calls _sync if a schedule() call follows.
-- Manfred
--- 2.5/fs/pipe.c Sat Oct 19 11:40:14 2002 +++ build-2.5/fs/pipe.c Sat Oct 19 19:44:04 2002 @@ -109,7 +109,7 @@ break; } 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); } pipe_wait(inode); @@ -117,7 +117,7 @@ up(PIPE_SEM(*inode)); /* Signal writers asynchronously that there is more room. */ if (do_wakeup) { - wake_up_interruptible_sync(PIPE_WAIT(*inode)); + wake_up_interruptible(PIPE_WAIT(*inode)); kill_fasync(PIPE_FASYNC_WRITERS(*inode), SIGIO, POLL_OUT); } if (ret > 0)
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