[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] [xen-4.0-testing] x86-64: Fix memory hotplug epfn upper limit test for updating the
# HG changeset patch # User Malcolm Crossley <malcolm.crossley@xxxxxxxxxx> # Date 1335878191 -3600 # Node ID b1a00a222eb948feeb81ccc2ebd822787316fb47 # Parent 4e446ac2c6de1df2586046b7d103b8867e8f591f x86-64: Fix memory hotplug epfn upper limit test for updating the compat M2P table The epfn is being compared to (RDWR_COMPAT_MPT_VIRT_END - RDWR_COMPAT_MPT_VIRT_START) without a 2 bit shift, resulting in the epfn being compared to the size of the RDWR_COMPAT_MPT table in bytes instead of the maximum page frame number that the RDWR_COMPAT_MPT table can map. Signed-off-by: Malcolm Crossley <malcolm.crossley@xxxxxxxxxx> Committed-by: Jan Beulich <jbeulich@xxxxxxxx> xen-unstable changeset: 25242:b7ce6a88bebb xen-unstable date: Wed Apr 25 12:35:56 2012 +0200 --- diff -r 4e446ac2c6de -r b1a00a222eb9 xen/arch/x86/x86_64/mm.c --- a/xen/arch/x86/x86_64/mm.c Tue Apr 17 08:37:47 2012 +0100 +++ b/xen/arch/x86/x86_64/mm.c Tue May 01 14:16:31 2012 +0100 @@ -446,7 +446,7 @@ static int setup_compat_m2p_table(struct if ((smap > ((RDWR_COMPAT_MPT_VIRT_END - RDWR_COMPAT_MPT_VIRT_START) >> 2)) ) return 0; - if (epfn > (RDWR_COMPAT_MPT_VIRT_END - RDWR_COMPAT_MPT_VIRT_START)) + if ( epfn > ((RDWR_COMPAT_MPT_VIRT_END - RDWR_COMPAT_MPT_VIRT_START) >> 2) ) epfn = (RDWR_COMPAT_MPT_VIRT_END - RDWR_COMPAT_MPT_VIRT_START) >> 2; emap = ( (epfn + ((1UL << (L2_PAGETABLE_SHIFT - 2)) - 1 )) & _______________________________________________ Xen-changelog mailing list Xen-changelog@xxxxxxxxxxxxx http://lists.xensource.com/xen-changelog
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