Re: [Xen-devel] preparing for 4.2.2 and 4.1.5 / libxl blktap2 patches

[Pasi Kärkkäinen <pasik@xxxxxx>]

On Wed, Mar 27, 2013 at 07:51:05AM -0500, Dr. Greg Wettstein wrote:
> > 
> > So these patches still need to be applied to Xen 4.2 branch:
> > 
> > "[PATCH] libxl: don't launch more than one tapdisk process for each disk"
> > http://xenbits.xen.org/gitweb/?p=3Dxen.git;a=3Dcommit;h=3Dec398660e89ca18bb=
> > 8d061d5047d682bd383778a
> > 
> > Xen 4.2 backport of the above patch is here:
> > http://lists.xen.org/archives/html/xen-devel/2013-03/msg00778.html
> > 
> > And now there's other tapdisk patch in xen-unstable aswell:
> > 
> > "tools: Retry blktap2 tapdisk message on interrupt":
> > http://xenbits.xen.org/gitweb/?p=3Dxen.git;a=3Dcommit;h=3D6cffb2b469a55032a=
> > 2900ccb8776c0082f346758
> > 
> > Both are needed in Xen 4.2 branch, please backport/apply before next Xen 4.=
> > 2.2-rc !
> > 
> > I'm asking because we've seen these problems with the CentOS 6 Xen 4.2 rpms,
> > and it'd be good to get them fixed in upstream Xen 4.2 aswell.
> 
> Ian raised a good point with respect to the read/write system calls in
> the blktap2 control plane needing to handle EINTR as well.  We've
> never seen this issue in the field but it should be handled.
> 
> I will see if I can get a patch spun today on top of my last patch to
> add that if no one beats me to it.
> 

Ok, thanks! So that patch is now in master/xen-unstable aswell.

IanJ: These three patches from master need to be applied to Xen 4.2 branch. 
Let's do it now before Xen 4.2.2-rc2.


"libxl: don't launch more than one tapdisk process for each disk":
http://xenbits.xen.org/gitweb/?p=xen.git;a=commit;h=ec398660e89ca18bb8d061d5047d682bd383778a
(Xen 4.2 backport: 
http://lists.xen.org/archives/html/xen-devel/2013-03/msg00778.html)

"tools: Retry blktap2 tapdisk message on interrupt":
http://xenbits.xen.org/gitweb/?p=xen.git;a=commit;h=6cffb2b469a55032a2900ccb8776c0082f346758

"tools/blktap2: Handle read/write interrupts in blktap2 control plane.":
http://xenbits.xen.org/gitweb/?p=xen.git;a=commit;h=a5c800142cfc82159fcb85b47116cf296caebcc5


Thanks! 


-- Pasi


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