[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH] x86/mm: disallow mmu hypercalls for a dying domain
The race condition should be avoided for efficiency. Signed-off-by: Kouya Shimura <kouya@xxxxxxxxxxxxxx> diff -r ba68bb0d229c xen/arch/x86/mm.c --- a/xen/arch/x86/mm.c Thu Nov 26 15:27:00 2009 +0000 +++ b/xen/arch/x86/mm.c Fri Nov 27 15:08:41 2009 +0900 @@ -2537,6 +2537,13 @@ static struct domain *get_pg_owner(domid MEM_LOG("Unknown domain '%u'", domid); break; } + if ( unlikely(pg_owner->is_dying) ) + { + MEM_LOG("Domain is dying"); + rcu_unlock_domain(pg_owner); + pg_owner = NULL; + break; + } if ( !IS_PRIV_FOR(curr, pg_owner) ) { MEM_LOG("Cannot set foreign dom"); _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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