Stefano Stabellini
2012-Feb-17 11:41 UTC
xen-netfront: txqueues in a frozen state, no packets in the softqueue
Forwarding this email to xen-devel with a proper subject. ---------- Forwarded message ---------- Stefano, after a few days running traffic, we are seeing that one of the linux netdevice txqueues has gone into a frozen state and any packet that you give from there onwards is always queued to a softqueue and is never put into the xen-netfront txqueue... it also looks like xen-netfront is not registering a timeout callback and this may lead to a crash if the callback ever gets invoked. do you happen to know if this has been seen before and if there was a fix for it? we are currently running with linux-3.0.9. Thank you! -Alessandro-
Andrew Cooper
2012-Feb-17 11:44 UTC
Re: xen-netfront: txqueues in a frozen state, no packets in the softqueue
XenServer had an issue which looked a little like this. The fix was http://xenbits.xensource.com/hg/xen-unstable.hg/rev/02b92d035f64 , but if you are using PV guests then this is certainly not the same issue. ~Andrew On 17/02/12 11:41, Stefano Stabellini wrote:> Forwarding this email to xen-devel with a proper subject. > > > ---------- Forwarded message ---------- > Stefano, > > after a few days running traffic, we are seeing that one of the > linux netdevice txqueues has gone into a frozen state and any packet > that you give from there onwards is always queued to a softqueue and > is never put into the xen-netfront txqueue... > > it also looks like xen-netfront is not registering a timeout callback > and this may lead to a crash if the callback ever gets invoked. > > do you happen to know if this has been seen before and if there was a > fix for it? > > we are currently running with linux-3.0.9. > > Thank you! > -Alessandro- > > _______________________________________________ > Xen-devel mailing list > Xen-devel@lists.xensource.com > http://lists.xensource.com/xen-devel-- Andrew Cooper - Dom0 Kernel Engineer, Citrix XenServer T: +44 (0)1223 225 900, http://www.citrix.com
Alessandro Salvatori
2012-Feb-17 20:15 UTC
Re: xen-netfront: txqueues in a frozen state, no packets in the softqueue
we are using PV networking (and disk for what matters). thanks! -Alessandro- Here i am, A young man, A crashing computer program, Here is a pen, write out my name... (from: The Servant - Orchestra) On Fri, Feb 17, 2012 at 03:44, Andrew Cooper <andrew.cooper3@citrix.com> wrote:> XenServer had an issue which looked a little like this. > > The fix was > http://xenbits.xensource.com/hg/xen-unstable.hg/rev/02b92d035f64 , but > if you are using PV guests then this is certainly not the same issue. > > ~Andrew > > On 17/02/12 11:41, Stefano Stabellini wrote: >> Forwarding this email to xen-devel with a proper subject. >> >> >> ---------- Forwarded message ---------- >> Stefano, >> >> after a few days running traffic, we are seeing that one of the >> linux netdevice txqueues has gone into a frozen state and any packet >> that you give from there onwards is always queued to a softqueue and >> is never put into the xen-netfront txqueue... >> >> it also looks like xen-netfront is not registering a timeout callback >> and this may lead to a crash if the callback ever gets invoked. >> >> do you happen to know if this has been seen before and if there was a >> fix for it? >> >> we are currently running with linux-3.0.9. >> >> Thank you! >> -Alessandro- >> >> _______________________________________________ >> Xen-devel mailing list >> Xen-devel@lists.xensource.com >> http://lists.xensource.com/xen-devel > > -- > Andrew Cooper - Dom0 Kernel Engineer, Citrix XenServer > T: +44 (0)1223 225 900, http://www.citrix.com >
Alessandro Salvatori
2012-Feb-17 20:17 UTC
Re: xen-netfront: txqueues in a frozen state, no packets in the softqueue
maybe i replied too quickly and impulsively. On Fri, Feb 17, 2012 at 12:15, Alessandro Salvatori <sandr8@gmail.com> wrote:> we are using PV networking (and disk for what matters).we are using PV networking (and disk for what matters), *on HVM* (PV/HVM). thanks! -Alessandro- Here i am, A young man, A crashing computer program, Here is a pen, write out my name... (from: The Servant - Orchestra) On Fri, Feb 17, 2012 at 12:15, Alessandro Salvatori <sandr8@gmail.com> wrote:> we are using PV networking (and disk for what matters). > > thanks! > -Alessandro- > Here i am, A young man, > A crashing computer program, > Here is a pen, write out my name... > > (from: The Servant - Orchestra) > > On Fri, Feb 17, 2012 at 03:44, Andrew Cooper <andrew.cooper3@citrix.com> wrote: >> XenServer had an issue which looked a little like this. >> >> The fix was >> http://xenbits.xensource.com/hg/xen-unstable.hg/rev/02b92d035f64 , but >> if you are using PV guests then this is certainly not the same issue. >> >> ~Andrew >> >> On 17/02/12 11:41, Stefano Stabellini wrote: >>> Forwarding this email to xen-devel with a proper subject. >>> >>> >>> ---------- Forwarded message ---------- >>> Stefano, >>> >>> after a few days running traffic, we are seeing that one of the >>> linux netdevice txqueues has gone into a frozen state and any packet >>> that you give from there onwards is always queued to a softqueue and >>> is never put into the xen-netfront txqueue... >>> >>> it also looks like xen-netfront is not registering a timeout callback >>> and this may lead to a crash if the callback ever gets invoked. >>> >>> do you happen to know if this has been seen before and if there was a >>> fix for it? >>> >>> we are currently running with linux-3.0.9. >>> >>> Thank you! >>> -Alessandro- >>> >>> _______________________________________________ >>> Xen-devel mailing list >>> Xen-devel@lists.xensource.com >>> http://lists.xensource.com/xen-devel >> >> -- >> Andrew Cooper - Dom0 Kernel Engineer, Citrix XenServer >> T: +44 (0)1223 225 900, http://www.citrix.com >>
Alessandro Salvatori
2012-Feb-17 20:43 UTC
Re: xen-netfront: txqueues in a frozen state, no packets in the softqueue
Andrew, is there a hot patch available for Xenserver 6.0.0 that fixes this? if not, when would it be available? thank you! -alessandro- On Fri, Feb 17, 2012 at 12:17, Alessandro Salvatori <sandr8@gmail.com> wrote:> maybe i replied too quickly and impulsively. > > On Fri, Feb 17, 2012 at 12:15, Alessandro Salvatori <sandr8@gmail.com> wrote: >> we are using PV networking (and disk for what matters). > > we are using PV networking (and disk for what matters), *on HVM* (PV/HVM). > > thanks! > -Alessandro- > Here i am, A young man, > A crashing computer program, > Here is a pen, write out my name... > > (from: The Servant - Orchestra) > > > > On Fri, Feb 17, 2012 at 12:15, Alessandro Salvatori <sandr8@gmail.com> wrote: >> we are using PV networking (and disk for what matters). >> >> thanks! >> -Alessandro- >> Here i am, A young man, >> A crashing computer program, >> Here is a pen, write out my name... >> >> (from: The Servant - Orchestra) >> >> On Fri, Feb 17, 2012 at 03:44, Andrew Cooper <andrew.cooper3@citrix.com> wrote: >>> XenServer had an issue which looked a little like this. >>> >>> The fix was >>> http://xenbits.xensource.com/hg/xen-unstable.hg/rev/02b92d035f64 , but >>> if you are using PV guests then this is certainly not the same issue. >>> >>> ~Andrew >>> >>> On 17/02/12 11:41, Stefano Stabellini wrote: >>>> Forwarding this email to xen-devel with a proper subject. >>>> >>>> >>>> ---------- Forwarded message ---------- >>>> Stefano, >>>> >>>> after a few days running traffic, we are seeing that one of the >>>> linux netdevice txqueues has gone into a frozen state and any packet >>>> that you give from there onwards is always queued to a softqueue and >>>> is never put into the xen-netfront txqueue... >>>> >>>> it also looks like xen-netfront is not registering a timeout callback >>>> and this may lead to a crash if the callback ever gets invoked. >>>> >>>> do you happen to know if this has been seen before and if there was a >>>> fix for it? >>>> >>>> we are currently running with linux-3.0.9. >>>> >>>> Thank you! >>>> -Alessandro- >>>> >>>> _______________________________________________ >>>> Xen-devel mailing list >>>> Xen-devel@lists.xensource.com >>>> http://lists.xensource.com/xen-devel >>> >>> -- >>> Andrew Cooper - Dom0 Kernel Engineer, Citrix XenServer >>> T: +44 (0)1223 225 900, http://www.citrix.com >>>