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Re: don't use wapbl (-o log) on / (/dev)
- Subject: Re: don't use wapbl (-o log) on / (/dev)
- From: David Laight <david%l8s.co.uk@localhost>
- Date: Thu, 7 May 2009 07:50:30 +0100
On Thu, May 07, 2009 at 01:31:26AM +0000, David Holland wrote:
> > cache needs to exist in the discs device driver, not in a FS.
> That's not really true; you want to drop/invalidate buffers for blocks
> that you free when you truncate a file, and that happens regardless of
> whether the cachce is virtually or physically indexed.
Actually it would be useful to tell the disk driver that a block isn't
needed any more. Devices with large erase blocks would benefit from
having more unallocated sectors.
David Laight: david%l8s.co.uk@localhost
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