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From: Ian Jackson <Ian.Jackson@eu.citrix.com>
To: "Andrew Cooper" <andrew.cooper3@citrix.com>,
	"Roger Pau Monné" <roger.pau@citrix.com>,
	"Ian Campbell" <ian.campbell@citrix.com>,
	"Ross Lagerwall" <ross.lagerwall@citrix.com>,
	xen-devel@lists.xen.org, "Wei Liu" <wei.liu2@citrix.com>
Subject: [PATCH v2 0/2]: libxl: datacopier POLLHUP fixes
Date: Tue, 7 Apr 2015 14:05:17 +0100	[thread overview]
Message-ID: <21795.54797.502271.384422@mariner.uk.xensource.com> (raw)

7e9ec50b0535 "tools/libxl: Adjust datacopiers POLLHUP handling when
the fd is also readable" has been reverted by the application of what
was 1/3 of v1 of this mini-series.

(Sorry about the odd reference in the commit message to `later in this
mail', which was a reference to `Avoid [theoretical] eof/POLLHUP race'
and ought to have just read `later'.)

These are the remaining two patches:

[PATCH 1/2] libxl: datacopier: Avoid eof/POLLHUP race

This was 3/3 and was described as "theoretical" but with a test patch
Roger has been able to reproduce it and verify that this patch fixes
the problem.  This bug is still (I think) quite unlikely, but
this patch is a IMO candidate for backport.

[PATCH 2/2] libxl: Cope with pipes which signal POLLHUP|POLLIN on

An earlier (wrong, I now think) approach to this was 2/3 of the
previous series.  I have removed Ian Campbell's ack.  It would be good
to know whether this revised version actually fixes the bug that
7e9ec50b0535 was aimed at.

Thanks,
Ian.

             reply	other threads:[~2015-04-07 13:05 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-04-07 13:05 Ian Jackson [this message]
2015-04-07 13:05 ` [PATCH 1/2] libxl: datacopier: Avoid eof/POLLHUP race Ian Jackson
2015-04-07 13:05   ` [PATCH 2/2] libxl: Cope with pipes which signal POLLHUP|POLLIN on read eof Ian Jackson
2015-04-08 11:05     ` Wei Liu
2015-04-15 13:31       ` Ian Campbell

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