[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH] xen/pvhsim: fix cpu onlining
On Wed, Oct 23, 2019 at 02:12:09PM +0200, Juergen Gross wrote: > Since commit 8d3c326f6756d1 ("xen: let vcpu_create() select processor") > the initial processor for all pv-shim vcpus will be 0, as no other cpus > are online when the vcpus are created. Before that commit the vcpus > would have processors set not being online yet, which worked just by > chance. > > When the pv-shim vcpu becomes active it will have a hard affinity > not matching its initial processor assignment leading to failing > ASSERT()s or other problems depending on the selected scheduler. > > Fix that by doing the affinity setting after onlining the cpu but > before taking the vcpu up. For vcpu 0 this is still in > sched_setup_dom0_vcpus(), for the other vcpus setting the affinity > there can be dropped. > > Fixes: 8d3c326f6756d1 ("xen: let vcpu_create() select processor") > Reported-by: Sergey Dyasli <sergey.dyasli@xxxxxxxxxx> > Tested-by: Sergey Dyasli <sergey.dyasli@xxxxxxxxxx> > Signed-off-by: Juergen Gross <jgross@xxxxxxxx> Reviewed-by: Roger Pau Monné <roger.pau@xxxxxxxxxx> Thanks. _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxxx https://lists.xenproject.org/mailman/listinfo/xen-devel
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