From: Anton Blanchard <anton@samba.org>
To: benh@kernel.crashing.org, paulus@samba.org, mikey@neuling.org,
miltonm@bga.com
Cc: kexec@lists.infradead.org, linuxppc-dev@lists.ozlabs.org
Subject: [PATCH] powerpc: pseries: Fix kexec on machines with more than 4TB of RAM
Date: Wed, 27 Jul 2011 14:15:03 +1000 [thread overview]
Message-ID: <20110727141503.3faa93f5@kryten> (raw)
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@samba.org>
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 13:50:18.408091576 +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
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next reply other threads:[~2011-07-27 4:15 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-07-27 4:15 Anton Blanchard [this message]
2011-07-27 4:26 ` [PATCH] powerpc: pseries: Fix kexec on machines with more than 4TB of RAM Michael Neuling
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