From: "Jan Beulich" <JBeulich@novell.com>
To: George Dunlap <George.Dunlap@eu.citrix.com>
Cc: "xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>
Subject: regression from c/s 22071:c5aed2e049bc (ept: Put locks around ept_get_entry) ?
Date: Tue, 14 Dec 2010 08:39:06 +0000 [thread overview]
Message-ID: <4D073B3A0200007800027BDF@vpn.id2.novell.com> (raw)
George,
with ept_get_entry() calling ept_pod_check_and_populate(), which in
turn unconditionally calls p2m_lock(), we got a report of the BUG() in
p2m_lock() triggering (in a backport of the patch on top of 4.0.1 - the
logic seems unchanged in -unstable, and hence the issue ought to
similarly exist there). Wouldn't therefore ept_pod_check_and_populate(),
only ever called from ept_get_entry(), not need to do any locking on
its own at all?
Thanks, Jan
next reply other threads:[~2010-12-14 8:39 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-12-14 8:39 Jan Beulich [this message]
2010-12-14 10:47 ` regression from c/s 22071:c5aed2e049bc (ept: Put locks around ept_get_entry) ? George Dunlap
2010-12-14 10:48 ` George Dunlap
2010-12-14 12:37 ` Jan Beulich
2010-12-14 14:32 ` George Dunlap
2010-12-14 14:34 ` George Dunlap
2010-12-14 14:50 ` Jan Beulich
2010-12-16 15:51 ` Jan Beulich
2010-12-16 16:12 ` Keir Fraser
2010-12-16 16:22 ` Jan Beulich
2010-12-16 16:42 ` Keir Fraser
2010-12-16 16:50 ` Jan Beulich
2010-12-16 17:03 ` Keir Fraser
2010-12-16 20:34 ` Keir Fraser
2010-12-17 11:15 ` Tim Deegan
2010-12-20 16:24 ` George Dunlap
2010-12-17 14:03 ` Olaf Hering
2010-12-17 14:18 ` Keir Fraser
2010-12-16 16:59 ` Keir Fraser
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4D073B3A0200007800027BDF@vpn.id2.novell.com \
--to=jbeulich@novell.com \
--cc=George.Dunlap@eu.citrix.com \
--cc=xen-devel@lists.xensource.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).