|author||Jilles Tjoelker <jilles@FreeBSD.org>||2011-12-14 22:26:39 +0000|
|committer||Jilles Tjoelker <jilles@FreeBSD.org>||2011-12-14 22:26:39 +0000|
Fix select/poll/kqueue for write on reverse direction before first write.
The reverse direction of a pipe is lazily allocated on the first write in that direction (because pipes are usually used in one direction only). A special case is needed to ensure the pipe appears writable before the first write because there are 0 bytes of pending data in 0 bytes of buffer space at that point, leaving 0 bytes of data that can be written with the normal code. Note that the first write returns [ENOMEM] if kern.ipc.maxpipekva is exceeded and does not block or return [EAGAIN], so selecting true for write is correct even in that case. PR: kern/93685 Submitted by: gianni MFC after: 2 weeks
Notes: svn path=/head/; revision=228510
Diffstat (limited to 'ObsoleteFiles.inc')
0 files changed, 0 insertions, 0 deletions