On a box with 8TB of RAM the MMU hashtable is 64GB in size. That means we have 4G PTEs. pSeries_lpar_hptab_clear was using a signed int to store the index which will overflow at 2G. Signed-off-by: Anton Blanchard <anton at samba.org> Cc: <stable at kernel.org> --- Index: linux-powerpc/arch/powerpc/platforms/pseries/lpar.c =================================================================== --- linux-powerpc.orig/arch/powerpc/platforms/pseries/lpar.c 2011-07-27 13:50:18.408091576 +1000 +++ linux-powerpc/arch/powerpc/platforms/pseries/lpar.c 2011-07-27 13:51:19.359196131 +1000 @@ -203,7 +203,7 @@ static void pSeries_lpar_hptab_clear(voi unsigned long ptel; } ptes[4]; long lpar_rc; - int i, j; + unsigned long i, j; /* Read in batches of 4, * invalidate only valid entries not in the VRMA
