diff options
Diffstat (limited to 'sys/kern/sys_pipe.c')
| -rw-r--r-- | sys/kern/sys_pipe.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/sys/kern/sys_pipe.c b/sys/kern/sys_pipe.c index 0df5269cdca8..6cdd7b4400c4 100644 --- a/sys/kern/sys_pipe.c +++ b/sys/kern/sys_pipe.c @@ -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) { |