mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-09-27 12:57:53 +00:00
Code Issues Releases Wiki Activity

9p: document short read behaviour with O_NONBLOCK

Browse source 
Regular files opened with O_NONBLOCK allow read to return after a single
round-trip with the server instead of trying to fill buffer.
Add a few lines in 9p documentation to describe that.

Link: http://lkml.kernel.org/r/1586193572-1375-1-git-send-email-asmadeus@codewreck.org
Signed-off-by: Dominique Martinet <dominique.martinet@cea.fr>
This commit is contained in:
Dominique Martinet 2020-04-06 19:19:32 +02:00
parent 43657496e4
commit c6f141412d
1 changed files with 10 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

10
Documentation/filesystems/9p.txt
View file

@ -133,6 +133,16 @@ OPTIONS
cache tags for existing cache sessions can be listed at
/sys/fs/9p/caches. (applies only to cache=fscache)
BEHAVIOR
========
This section aims at describing 9p 'quirks' that can be different
from a local filesystem behaviors.
- Setting O_NONBLOCK on a file will make client reads return as early
as the server returns some data instead of trying to fill the read
buffer with the requested amount of bytes or end of file is reached.
RESOURCES
=========