From: Gerd Knorr <kraxel@suse.de>
To: xen-devel@lists.xensource.com
Subject: [patch] pae >4gb fix #1
Date: Fri, 5 Aug 2005 16:13:07 +0200 [thread overview]
Message-ID: <20050805141307.GA17032@bytesex> (raw)
Hi,
mpt size calculation is wrong, we don't allocate enougth 2MB
pages and pagefault in the memset which clears the mpt.
Gerd
--- xen/arch/x86/x86_32/mm.c.pae 2005-08-05 15:39:23.000000000 +0200
+++ xen/arch/x86/x86_32/mm.c 2005-08-05 16:05:39.115794436 +0200
@@ -98,7 +98,9 @@
* installed, but at least 4MB to cover 4GB address space. This is needed
* to make PCI I/O memory address lookups work in guests.
*/
- if ( (mpt_size = max_page * 4) < (4*1024*1024) )
+#define L2_MASK ((1<<L2_PAGETABLE_SHIFT)-1)
+ mpt_size = (max_page * 4 + L2_MASK) & ~L2_MASK;
+ if (mpt_size < 4*1024*1024)
mpt_size = 4*1024*1024;
for ( i = 0; i < (mpt_size >> L2_PAGETABLE_SHIFT); i++ )
{
reply other threads:[~2005-08-05 14:13 UTC|newest]
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