Date: Sun, 08 Oct 2006 15:02:06 -0600 From: Scott Long <scottl@samsco.org> To: Bruce Evans <bde@zeta.org.au> Cc: freebsd-fs@freebsd.org, Kris Kennaway <kris@obsecurity.org> Subject: Re: 2 bonnies can stop disk activity permanently Message-ID: <4529674E.6000405@samsco.org> In-Reply-To: <20061009052237.X30864@delplex.bde.org> References: <20061008152213.59247.qmail@web30307.mail.mud.yahoo.com> <20061008165823.GA2061@xor.obsecurity.org> <45292EFA.4060903@samsco.org> <20061009052237.X30864@delplex.bde.org>
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Bruce Evans wrote: > On Sun, 8 Oct 2006, Scott Long wrote: > >> Kris Kennaway wrote: >> >>> You forgot to even mention what version you're running ;-) >>> >>> Also show your kernel config file. Configure DDB per the chapter on > > >> No need for all of that information, the bug in vfs_bio.c is quite >> obvious. =-( Fixing it will take some thought, though. > > > Is it really obvious? I think it is only obvious that many things are > not quite right. The quick fix of increasing BKVASIZE to the size of > the largest buffer used should still work to prevent bkva fragmentation. > > Bruce The use of needsbuffer global presents a very wide open race. Scott
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