Date: Tue, 16 Oct 2001 20:32:12 +0200 From: Maxime Henrion <mux@qualys.com> To: Matthew Dillon <dillon@apollo.backplane.com> Cc: freebsd-hackers@freebsd.org Subject: Re: cvs commit: src/sys/vm vnode_pager.c Message-ID: <20011016203212.D447@nebula.cybercable.fr> In-Reply-To: <200110161824.f9GIOjT33989@apollo.backplane.com> References: <20011016172843.A469@nebula.cybercable.fr> <200110161618.f9GGIpM31430@apollo.backplane.com> <20011016190340.A465@nebula.cybercable.fr> <200110161712.f9GHCbg33501@apollo.backplane.com> <20011016194937.A447@nebula.cybercable.fr> <200110161757.f9GHv5633749@apollo.backplane.com> <20011016200300.B447@nebula.cybercable.fr> <200110161804.f9GI4wF33862@apollo.backplane.com> <20011016201014.C447@nebula.cybercable.fr> <200110161824.f9GIOjT33989@apollo.backplane.com>
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Matthew Dillon wrote: > Well, 11% over a period of a single second, once every 30 seconds > makes sense if there are a lot of vnodes cached. I think you are > seeing the same issue, just that on -stable there is much lower > overhead. > > Basically we have two routines that are causing problems: > > ffs_sync() > qsync() (quota sync) [explanation ripped] Perhaps my problem is because of something else ; I recompiled a kernel with a different syncdelay in vfs_subr.c, 42s (sorry ;) instead of 30s. I also bumped SYNCER_MAXDELAY accordingly. But, the problem was still happening every 30s. Maxime -- Don't be fooled by cheap finnish imitations ; BSD is the One True Code To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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