Date: Thu, 24 Jan 2008 16:57:42 +0100 From: Gary Jennejohn <gary.jennejohn@freenet.de> To: Attila Nagy <bra@fsn.hu> Cc: freebsd-fs@freebsd.org, Ruslan Ermilov <ru@FreeBSD.org> Subject: Re: cvs commit: src/share/man/man4 sched_4bsd.4 sched_ule.4 Message-ID: <20080124165742.14696477@peedub.jennejohn.org> In-Reply-To: <4798A77E.1030308@fsn.hu> References: <200801241348.m0ODmKZu057100@repoman.freebsd.org> <4798A77E.1030308@fsn.hu>
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On Thu, 24 Jan 2008 15:58:06 +0100 Attila Nagy <bra@fsn.hu> wrote: > On 01/24/08 14:48, Ruslan Ermilov wrote: > > ru 2008-01-24 13:48:20 UTC > > > > FreeBSD src repository > > > > Modified files: > > share/man/man4 sched_4bsd.4 sched_ule.4 > > Log: > > - sched_4bsd is no longer a default system scheduler on some > > architectures, so call it "traditional" instead. > > > > - sched_ule is no longer buggy or experimental (according to > > rev. 1.7 of sched_ule(4)), so don't call it experimental > > (reported by a user on stable@). > > > I've tried ULE+ZFS on two machines recently (on 7-STABLE). One desktop > and one server. Both of them froze (for example on the server an already > running top kept running, but if I exited from that, I couldn't do > anything anymore. On the desktop, the window manager stops (no mouse, no > keyboard), but the clock applet remained active). > I thought it's ZFS, because all of these popped out while there were > increased disk activity, but on monday I've switched both of them to > SCHED_4BSD and since that no freeze happened. > > Anyone out there with ULE+ZFS (I ran them on i386 with 1 GB of RAM, SMP > systems)? > I'm running ULE+ZFS on a system with AMD64 X2 (AM2) and 3GB of memory with kmem_size cranked up to 1GB (64-bit installation). I rarely see hangs when accessing a ZFS file system. As an example I was watching a movie in a ZFS pool yesterday with vlc when it just stopped. top showed that vlc was waiting on umtxn for a mutex and it never left that state. I could kill it, however. After that I was able to watch a movie from the same ZFS pool without a problem. Since I had X running I couldn't easily get into ddb. I've also seen other apparently ZFS-related hangs in the past, but I can't remember the details any more. I do remember that one hang was so bad that I had to reset the box to recover. --- Gary Jennejohn
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