Re: md /tmp and async mounts

On Tue, May 23, 2006 at 04:30:37PM +0300, Giorgos Keramidas wrote:
> On 2006-05-22 16:14, Brooks Davis <brooks_at_one-eyed-alien.net> wrote:
> >On Mon, May 22, 2006 at 05:12:24PM -0400, Kris Kennaway wrote:
> >> I noticed that with tmpmfs in rc.conf, the md is not being mounted
> >> with -o async; this is an enormous performance boost, so is there a
> >> reason it is not used, or just that it was overlooked?
> >
> > Just overlooked as far as I know.  We correctly switched to not mounting
> > with softupdates, but should probably switch to -o async.
> 
> Right.  The only reasons why the current tmpmfs_flags doesn't
> include the `-o async' option too are:
> 
>     a) It didn't back when it was all hardcoded in the script
> 
>     b) I didn't think about adding it by default when revision
>        1.230 of src/etc/defaults/rc.conf was committed by me
> 
> If it does improve things, we should probably make the change :)
> 

The sys/dev/md/md.c rev 1.115 commit log says async used to be the default, 
but was switched off because it was causing deadlocks. Did this get fixed
since ?

Cheers,

Olivier