Re: [PATCH] powerpc: pseries: Fix kexec on machines with more than 4TB of RAM
From: Michael Neuling <hidden>
Date: 2011-07-27 04:26:10
Also in:
kexec
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.
Wow, I hear... "Anton Blanchard's machine has more memory in it's MMU than you have in total". Acked-by: Michael Neuling <redacted>
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Signed-off-by: Anton Blanchard <redacted> Cc: <stable@kernel.org> --- Index: linux-powerpc/arch/powerpc/platforms/pseries/lpar.c ===================================================================--- linux-powerpc.orig/arch/powerpc/platforms/pseries/lpar.c 2011-07-27 13:5
0:18.408091576 +1000
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+++ linux-powerpc/arch/powerpc/platforms/pseries/lpar.c 2011-07-27 13:5
1:19.359196131 +1000
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@@ -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