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Disable direct writes for non-blocking output.

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This commit is contained in:
John Dyson 1996-06-17 05:15:01 +00:00
parent ef743ce6ed
commit 23fd45be00
1 changed files with 5 additions and 2 deletions
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7
sys/kern/sys_pipe.c
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@ -16,7 +16,7 @@
* 4. Modifications may be freely made to this file if the above conditions
* are met.
*
* $Id: sys_pipe.c,v 1.15 1996/03/25 01:48:28 dyson Exp $
* $Id: sys_pipe.c,v 1.16 1996/06/12 05:07:32 gpalmer Exp $
*/
#ifndef OLD_PIPE
@ -733,8 +733,11 @@ pipewrite(wpipe, uio, nbio)
/*
* If the transfer is large, we can gain performance if
* we do process-to-process copies directly.
* If the write is non-blocking, we don't use the
* direct write mechanism.
*/
if ((amountpipekva < LIMITPIPEKVA) &&
if ((wpipe->pipe_state & PIPE_NBIO) == 0 &&
(amountpipekva < LIMITPIPEKVA) &&
(uio->uio_iov->iov_len >= PIPE_MINDIRECT)) {
error = pipe_direct_write( wpipe, uio);
if (error) {