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	Sun, 08 Oct 2006 13:33:49 PDT
Date: Sun, 8 Oct 2006 13:33:49 -0700 (PDT)
From: "R. B. Riddick" <arne_woerner@yahoo.com>
To: Bruce Evans <bde@zeta.org.au>, Scott Long <scottl@samsco.org>
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Cc: freebsd-fs@freebsd.org, Kris Kennaway <kris@obsecurity.org>
Subject: Re: 2 bonnies can stop disk activity permanently
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Bruce wrote:=0A>On Sun, 8 Oct 2006, Scott Long wrote:=0A>> Kris Kennaway wr=
ote:=0A>>> You forgot to even mention what version you're running ;-)=0A>>>=
 =0A>>> Also show your kernel config file.  Configure DDB per the chapter o=
n=0A>>>=0A>> No need for all of that information, the bug in vfs_bio.c is q=
uite obvious. =0A>> =3D-(  Fixing it will take some thought, though.=0A>=0A=
>Is it really obvious?  I think it is only obvious that many things are=0A>=
not quite right.  The quick fix of increasing BKVASIZE to the size of=0A>th=
e largest buffer used should still work to prevent bkva fragmentation.=0A>=
=0AOK: The FBSD version was varying: R6.1, R6.1-CURRENT, R7-CURRENT.=0A=0AB=
ut we just found out, that it happens when we use "newfs -b 65536", but not=
 with default "-b" value (whatever that might be)...=0A=0ASo if somebody wa=
nts to reproduce it, he/she should use >R6 and "newfs -b 65536"...=0AI thin=
k that were all steps to do...=0A=0ACan somebody reproduce it now?=0ADDB is=
 not my bag, so that I would be glad, if somebody with an appropriate setti=
ng could reproduce it...=0A=0A-Arne=0A=0A=0A=0A=0A=0A