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spapr: set vsmt to MAX(8, smp_threads)

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We ignore silently the value of smp_threads when we set
the default VSMT value, and if smp_threads is greater than VSMT
kernel is going into trouble later.

Fixes: 8904e5a750
("spapr: Adjust default VSMT value for better migration compatibility")

Signed-off-by: Laurent Vivier <lvivier@redhat.com>
Reviewed-by: Greg Kurz <groug@kaod.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Laurent Vivier 2018-02-09 09:18:58 +01:00 committed by David Gibson
parent ae14d81757
commit 4ad64cbd0c
1 changed files with 1 additions and 1 deletions
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hw/ppc/spapr.c
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@ -2310,7 +2310,7 @@ static void spapr_set_vsmt_mode(sPAPRMachineState *spapr, Error **errp)
* the value that we'd get with KVM on POWER8, the
* overwhelmingly common case in production systems.
*/
spapr->vsmt = 8;
spapr->vsmt = MAX(8, smp_threads);
}
/* KVM: If necessary, set the SMT mode: */