On Thu, Apr 27, 2006 at 08:26:06PM +0200, [EMAIL PROTECTED] wrote: > Kris Kennaway a ?crit : > >On Thu, Apr 27, 2006 at 05:08:11PM +0300, Dmitry Pryanishnikov wrote: > > > > > >>options QUOTA > > > >This definitely effects performance on 6.x since it makes your > >filesystem giant-locked, which may also interfere with your network > >processing. > > Why would QUOTA affect performance more on 6.x than 4.x ? I would like > to understand because i think a system cannot be secure without QUOTA
It makes filesystem writes acquire Giant, which blocks other kernel code that needs to also acquire Giant. When the need to acquire Giant was removed from the mainstream UFS code in 6.0 it was an enormous performance improvement. Kris
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