oysteikt/mpd
0
0
Fork 0
Code Issues Pull Requests Releases Activity

input/uring: new input plugin using io_uring

Browse Source 
This is the final piece of the series to establish io_uring support on
Linux.

MPD doesn't need io_uring for its efficient bulk I/O support, but to
allow file I/O to be cancelled.  This is a big problem on CIFS/NFS
mounts where processes sleep uninterruptable if the file server
disappears, deadlocking MPD.

With io_uring, a flaky NFS connection allows MPD to continue to work
(even though there are still deadlocks inside MPD which need to be
addressed).

This plugin does not yet use cancellable `open()` using
`IORING_OP_OPENAT`.  This will be implemented later.

Lots of other optimization opportunities for io_uring are still
missing as well - for example the database update could benefit a lot,
but unfortunately, io_uring doesn't have `readdir()` support just yet.
This commit is contained in:
Max Kellermann
2020-05-05 15:32:41 +02:00
parent cdf8ac001c
commit dae8da7066
7 changed files with 265 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
NEWS
View File

@@ -11,6 +11,7 @@ ver 0.22 (not yet released)
* input
- curl: support "charset" parameter in URI fragment
- ffmpeg: allow partial reads
- io_uring: new plugin for local files on Linux (using liburing)
* archive
- iso9660: support seeking
* playlist