kern/133604: [gvinum] [panic] writing to gjournal on a gvinum
Pawel Jakub Dawidek
pjd at FreeBSD.org
Tue Apr 21 09:48:25 UTC 2009
On Sun, Apr 19, 2009 at 10:10:06AM +0000, Ulf Lilleengen wrote:
> The following reply was made to PR kern/133604; it has been noted by GNATS.
> From: Ulf Lilleengen <lulf at FreeBSD.org>
> To: bug-followup at FreeBSD.org
> Subject: Re: kern/133604: [gvinum] [panic] writing to gjournal on a gvinum
> Date: Sun, 19 Apr 2009 13:02:54 +0200
> On Tue, Apr 14, 2009 at 09:00:07AM +0000, Ulf Lilleengen wrote:
> > The following reply was made to PR kern/133604; it has been noted by GNATS.
> > From: Ulf Lilleengen <ulf.lilleengen at gmail.com>
> > To: bug-followup at FreeBSD.org, pmc at citylink.dinoex.sub.org
> > Cc:
> > Subject: Re: kern/133604: [gvinum] [panic] writing to gjournal on a gvinum
> > volume
> > Date: Tue, 14 Apr 2009 10:21:54 +0200
> > --000e0cd25b640a4f6004677f8657
> > Content-Type: text/plain; charset=UTF-8
> > Content-Transfer-Encoding: 7bit
> > On Sun, Apr 12, 2009 at 12:10 AM, <linimon at freebsd.org> wrote:
> > > Old Synopsis: [panic] writing to gjournal on a gvinum volume
> > > New Synopsis: [gvinum] [panic] writing to gjournal on a gvinum volume
> > >
> > > Responsible-Changed-From-To: freebsd-bugs->freebsd-geom
> > > Responsible-Changed-By: linimon
> > > Responsible-Changed-When: Sat Apr 11 22:10:10 UTC 2009
> > > Responsible-Changed-Why:
> > > Over to maintainer(s).
> > >
> > > http://www.freebsd.org/cgi/query-pr.cgi?pr=133604
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> > Are you able to try gvinum from HEAD to see if it works there? I'll take a
> > look into gvinum on 7.2-PRE as well, but just in case you would like to try
> > it.
> Ok, I tracked down the issue. The problem is in both HEAD and 7.x, so I will
> fix it in HEAD first. The problem is the bio_cflags part of the bio that
> gjournal sends down to gvinum. When gjournal does a read, it sets GJ_BIO_READ
> in bio_cflags. When the request arrives to gvinum it check cflags for
> GV_BIO_DONE to check if the request is a done request, in which case it will
> be treated like a bio of gvinum. The crash comes from GJ_BIO_READ having the
> same value as GV_BIO_DONE. I'll generate a fix that makes gvinum not depend
> on the bio_cflags value of external BIOs.
The bio_cflags field is for consumer use only (in this case gjournal. As
provide you should use bio_pflags.
Pawel Jakub Dawidek http://www.wheel.pl
pjd at FreeBSD.org http://www.FreeBSD.org
FreeBSD committer Am I Evil? Yes, I Am!
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