svn commit: r287892 - head/sys/dev/usb/wlan
Hans Petter Selasky
hps at selasky.org
Thu Sep 17 07:30:14 UTC 2015
On 09/17/15 05:01, Adrian Chadd wrote:
> Author: adrian
> Date: Thu Sep 17 03:01:19 2015
> New Revision: 287892
> URL: https://svnweb.freebsd.org/changeset/base/287892
>
> Log:
> Use DELAY() rather than usb_pause_mtx() - the latter releases the lock
> before waiting, which prevents the lock from really acting like
> a hardware serialiser. Sigh.
>
> Modified:
> head/sys/dev/usb/wlan/if_rsu.c
>
This cause a lot more CPU to be burnt. Is there no other way to fix
this? Using an SX lock?
--HPS
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