[patch] giant-less quotas for UFS

[Nicolas KOWALSKI]

Kostik Belousov <kostikbel at gmail.com> writes:

> On Mon, Apr 10, 2006 at 04:16:27PM +0200, Nicolas KOWALSKI wrote:
>> Hello,
>> 
>> Kostik Belousov <kostikbel at gmail.com> writes:
>> 
>> > I already mailed about my development of the patch that
>> > allows for UFS with quotas to operate without Giant. Sorry if the
>> > repeat would be annoying.
>> 
>> Does this patch improve the performance of a file server, using
>> multiple disks, controlled by quotas, exported by NFS/Samba ?
>> 
>> If so, I would be really interested: our file server (4.11, but
>> perhaps 6.x soon), has some major slowdowns when one or multiple
>> user/s exceed her/his quota ; this impact every user, even those
>> working on another disk.
> I don't think that patch shall have effect on this situation (quota
> exceeded).

:-( , but Thanks for your response.

> Probably, you have some other issues, esp. for 4.x, where
> only one process can progress in kernel mode anyway.
> Just guessing: do you have slow (serial) console ?

No serial console here, the server is connected to a standard vga/ps2
KVM switch.

> Yes, I expect patch to improve overall system performance for 6.x/7 when
> quotas are compiled in the kernel compared with the same kernel
> config without patch. This was the reason for developing the change.
> I do not have a numerical measurement of improvement, though.
> I will be very glad for testing/stress testing/performance measurement
> for the patch.
>
> BUT, PLEASE BEWARE. Don't apply the patch for non-test machines.

Ok, I will install a test machine and try to stress it.

Best regards,
-- 
Nicolas