[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH net] xen-netback: add the scenario which now beyond the range time_after_eq().
On Fri, Oct 18, 2013 at 12:38:12AM +0800, annie li wrote: > > On 2013-10-17 17:26, Jan Beulich wrote: > >>Yes, the issue only can be reproduced in 32-bit Dom0 (Beyond > >>MAX_ULONG/2 in 64-bit will need long long time) > >> > >>I think the gap should be think all environment even now extending 480+. > >>if now fall in the gap, one timer will be pending and replenish will be > >>in time. Please run the attachment test program. > >Not sure what this is supposed to tell me. I recognize that there > >are overflow conditions not handled properly, but (a) I have a > >hard time thinking of a sensible guest that sits idle for over 240 > >days (host uptime usually isn't even coming close to that due to > >maintenance requirements) and (b) if there is such a sensible > >guest, then I can't see why dealing with one being idle for over > >480 days should be required too. > > > > If the guest contains multiple NICs, that situation probably happens > when one NIC keeps idle and others work under load. BTW, how do you > get the 240? > I think Jan got this number with HZ=100. It take ~240 days for jiffies to overflow in 32 bit machine when HZ=100. Wei. > Thanks > Annie _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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