Date: Mon, 10 Apr 2006 17:36:54 +0200 From: Nicolas KOWALSKI <Nicolas.Kowalski@imag.fr> To: freebsd-fs@FreeBSD.org Subject: Re: [patch] giant-less quotas for UFS Message-ID: <vqou091v3vt.fsf@corbeau.imag.fr> In-Reply-To: <20060410144904.GC1408@deviant.kiev.zoral.com.ua> References: <20060329152608.GB1375@deviant.kiev.zoral.com.ua> <vqoy7ydv7lw.fsf@corbeau.imag.fr> <20060410144904.GC1408@deviant.kiev.zoral.com.ua>
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Kostik Belousov <kostikbel@gmail.com> writes: > On Mon, Apr 10, 2006 at 04:16:27PM +0200, Nicolas KOWALSKI wrote: >> Hello, >> >> Kostik Belousov <kostikbel@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
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