Date: Sun, 31 Jul 2011 22:28:29 +0300 From: Andriy Gapon <avg@FreeBSD.org> To: Rick Macklem <rmacklem@uoguelph.ca> Cc: FreeBSD-Current <freebsd-current@FreeBSD.org> Subject: Re: Heavy I/O blocks FreeBSD box for several seconds Message-ID: <4E35ACDD.90303@FreeBSD.org> In-Reply-To: <1368975528.1226755.1312139001048.JavaMail.root@erie.cs.uoguelph.ca> References: <1368975528.1226755.1312139001048.JavaMail.root@erie.cs.uoguelph.ca>
next in thread | previous in thread | raw e-mail | index | archive | help
on 31/07/2011 22:03 Rick Macklem said the following: > Ok, so if the scheduler spin lock is being held too long, what could > cause this, if it isn't a scheduler bug? > > I can't think of how NFS would affect this beyond causing a heavy I/O > load, but if there is some way it does, I suppose I need to know what > that is? I think I've already referred to the thread on stable@. This is currently being investigated. P.S. Just a pure illustration you can grep for thread_lock to see where else outside schedulers the sched locks are taken. -- Andriy Gapon
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?4E35ACDD.90303>