[DragonFlyBSD - Submit #2804] Blocking IO in sound subsystem.

bugtracker-admin at leaf.dragonflybsd.org bugtracker-admin at leaf.dragonflybsd.org
Wed Mar 18 12:35:21 PDT 2015

Issue #2804 has been updated by dillon.

I really don't want to change the fcntl path via fionbio_master.patch.  That's a non-starter.

The patch in sound.patch is also a problem if there are multiple applications which have open()d the sound device in different ways because it appears to be modifying a shared structure.

The sound driver really has to handle the blocking or non-blocking I/O on a read-by-read and write-by-write basis, using the flags passed to read and write.


Submit #2804: Blocking IO in sound subsystem. 

* Author: yellowrabbit2010
* Status: New
* Priority: Normal
* Assignee: 
* Category: Driver
* Target version: 

Reapply old patch to the new sound system

>commit 3e2b80a43e8d3778b07c4680c8a2719cd4c7f621
>Author: Hasso Tepper <hasso at dragonflybsd.org>
>Date:   Mon Oct 8 17:55:00 2007 +0000
>    Dragonfly always passes a flag for every IO operation depending whether
>    the mode of the operation or of the fd is set to NBIO, but it doesn't
>    pass down fcntl() changes to the drivers. So, if you open /dev/dsp with
>    NONBLOCK and later fcntl it to blocking, the sound driver won't be aware
>    of this fact.

>    Fix: don't maintain this setting in the sound driver.

>    Requested and tested by corecode at .

sound.patch (645 Bytes)
FIONBIO_test.tar.bz2 (6.7 KB)
fionbio_master.patch (4.54 KB)

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