The current check refuses the hot-plugged memory that falls in one
unused PDX group, which should be allowed.
Signed-off-by: Haozhong Zhang <haozhong.zh...@intel.com>
---
Cc: Jan Beulich <jbeul...@suse.com>
Cc: Andrew Cooper <andrew.coop...@citrix.com>
---
xen/arch/x86/x86_64/mm.c | 6 +-----
1 file changed, 1 insertion(+), 5 deletions(-)
diff --git a/xen/arch/x86/x86_64/mm.c b/xen/arch/x86/x86_64/mm.c
index 11746730b4..6c5221f90c 100644
--- a/xen/arch/x86/x86_64/mm.c
+++ b/xen/arch/x86/x86_64/mm.c
@@ -1296,12 +1296,8 @@ static int mem_hotadd_check(unsigned long spfn, unsigned
long epfn)
return 0;
/* Make sure the new range is not present now */
- sidx = ((pfn_to_pdx(spfn) + PDX_GROUP_COUNT - 1) & ~(PDX_GROUP_COUNT - 1))
- / PDX_GROUP_COUNT;
+ sidx = (pfn_to_pdx(spfn) & ~(PDX_GROUP_COUNT - 1)) / PDX_GROUP_COUNT;
eidx = (pfn_to_pdx(epfn - 1) & ~(PDX_GROUP_COUNT - 1)) / PDX_GROUP_COUNT;
- if (sidx >= eidx)
- return 0;
-
s = find_next_zero_bit(pdx_group_valid, eidx, sidx);
if ( s > eidx )
return 0;
--
2.14.1
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