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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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