md /tmp and async mounts

[Kris Kennaway]

On Thu, Jun 01, 2006 at 03:20:24AM +0300, Giorgos Keramidas wrote:

[diff snipped]

Thanks for the patch.

> This doesn't make 'async' the default for all mdmfs mounts.
> 
> Making async the default for mdmfs-based filesystems would
> require a fair bit of changes to mdmfs, which would have to grow
> mount-option parsing capabilities for the `optarg' of the -o
> option and make sure that async is always added, unless mdmfs is
> called explicitly with `noasync' in its -o option.
> 
> Having said this, if this is considered a change we should make,
> I can prepare a patch for mdmfs too.

I think it should be the default.  I think we should also avoid using
-M (malloc backing for md) in favour of swap backing because of the
panic problems - this is too easy to trigger by accident and it makes
FreeBSD look bad since it looks like a bug.

Kris
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