Re: [PATCH] bump up nr_to_write in xfs_vm_writepage

[Olaf Weber <olaf@xxxxxxx>]

Christoph Hellwig writes:
> On Tue, Jul 07, 2009 at 11:07:30AM +0200, Olaf Weber wrote:

>> If the nr_to_write calculation really yields a value that is too
>> small, shouldn't it be fixed elsewhere?

> In theory it should.  But given the amazing feedback of the VM people
> on this I'd rather make sure we do get the full HW bandwith on large
> arrays instead of sucking badly and not just wait forever.

So how do you feel about making the fudge factor tunable?  I don't
have a good sense myself of what the value should be, whether the
hard-coded 4 is good enough in general.

-- 
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