diff options
Diffstat (limited to 'fs/pipe.c')
| -rw-r--r-- | fs/pipe.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/fs/pipe.c b/fs/pipe.c index aba2455caabe..9cd5cbef9552 100644 --- a/fs/pipe.c +++ b/fs/pipe.c @@ -324,16 +324,18 @@ pipe_read(struct kiocb *iocb, struct iov_iter *to) } if (!buf->len) { + bool wake; pipe_buf_release(pipe, buf); spin_lock_irq(&pipe->wait.lock); tail++; pipe->tail = tail; do_wakeup = 1; - if (head - (tail - 1) == pipe->max_usage) + wake = head - (tail - 1) == pipe->max_usage / 2; + if (wake) wake_up_interruptible_sync_poll_locked( &pipe->wait, EPOLLOUT | EPOLLWRNORM); spin_unlock_irq(&pipe->wait.lock); - if (head - (tail - 1) == pipe->max_usage) + if (wake) kill_fasync(&pipe->fasync_writers, SIGIO, POLL_OUT); } total_len -= chars; |