Date: Sun, 19 Dec 1999 11:32:38 -0800 (PST) From: Matthew Dillon <dillon@apollo.backplane.com> To: Vallo Kallaste <vallo@matti.ee> Cc: freebsd-current@FreeBSD.ORG Subject: Re: Weird story with dump | restore Message-ID: <199912191932.LAA06700@apollo.backplane.com> References: <199912171648.IAA29595@gndrsh.dnsmgr.net> <199912171732.JAA63489@apollo.backplane.com> <19991219111237.A37996@myhakas.matti.ee>
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:On Fri, Dec 17, 1999 at 09:32:04AM -0800, Matthew Dillon <dillon@apollo.backplane.com> wrote:
:
:> sysctl -a | fgrep dirty
:> sysctl -w vfs.lodirtybuffers=X
:> sysctl -w vfs.hidirtybuffers=Y
:
:Matt, I've tried your patch to sys/kern/vfs_bio.c, made no difference.
:Lowering the vfs.hidirtybuffers from 221 to 110 helps as before. The
:vfs.lodirtybuffers sysctl is gone for some reason.
Oh my. Maybe we have two problems here. Alfred had similar problems
and the patch fixed it right up.
Try running a 'top -S -s1' while you are running your test, with
my patch but without doing the sysctl's, and tell me what the various
programs block on when the problem occurs (buf_daemon and whatever
program is causing the hicup).
-Matt
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