From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
To: Markus Armbruster <armbru@redhat.com>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>,
xen-devel@lists.xensource.com, JBeulich@novell.com,
Ian.Campbell@eu.citrix.com, Olivier NOEL <ONOEL@tetra-info.com>,
keir.fraser@eu.citrix.com
Subject: Re: Re: mm.c:777:d2 Non-privileged (2) attempt to map I/O space 000f995a + (XEN) mm.c:845:d20 Error getting mfn jd (pfn 84fd) from L1 entry 800000000246d467 for l1e_owner=20, pg_owner=32753
Date: Tue, 1 Dec 2009 11:14:40 -0500 [thread overview]
Message-ID: <20091201161440.GA13941@phenom.dumpdata.com> (raw)
In-Reply-To: <m3skbvkptu.fsf@crossbow.pond.sub.org>
> I recommend against 3).
>
> 2.6.18's xenfb doesn't rely on deferred I/O, because that didn't exist
> then. It rolls its own code to do pretty much the same. The code is
> hairy (it took us a few iterations to get it working reliably), and
> there's still a race left in it[*]. It makes much more sense to solve
> such a hairy problem in just one place (fb_defio.c), and make that
> sufficiently capable for all uses. Moreover, I'd wager that in-tree
> fb_defio.c has been reviewed much more thoroughly than the out-of-tree
> 2.6.18 xenfb.c.
Wow. Thanks for saving me from going into that rat-hole! Will definitly
look at the 1a) solution.
prev parent reply other threads:[~2009-12-01 16:14 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-08-03 9:44 kernel BUG at arch/x86/xen/multicalls.c:103! Olivier NOEL
2009-08-04 23:55 ` Jeremy Fitzhardinge
2009-08-05 7:10 ` Olivier NOEL
2009-08-06 6:50 ` Olivier NOEL
2009-08-06 19:35 ` Jeremy Fitzhardinge
2009-11-09 23:50 ` mm.c:777:d2 Non-privileged (2) attempt to map I/O space 000f995a Konrad Rzeszutek Wilk
2009-11-10 0:20 ` Jeremy Fitzhardinge
2009-12-01 3:11 ` mm.c:777:d2 Non-privileged (2) attempt to map I/O space 000f995a + (XEN) mm.c:845:d20 Error getting mfn jd (pfn 84fd) from L1 entry 800000000246d467 for l1e_owner=20, pg_owner=32753 Konrad Rzeszutek Wilk
2009-12-01 6:40 ` Jeremy Fitzhardinge
2009-12-01 21:57 ` Konrad Rzeszutek Wilk
2009-12-01 22:44 ` Jeremy Fitzhardinge
2009-12-01 23:05 ` Konrad Rzeszutek Wilk
2009-12-01 9:26 ` Markus Armbruster
2009-12-01 16:14 ` Konrad Rzeszutek Wilk [this message]
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