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SubjectRe: 32-bit segfaults on x86_64 in recent mm kernels
Date
On Sunday 07 of November 2004 21:36, Andy Lutomirski wrote:
> I've had segfaults in 32-bit emulation in recent (and not-so-recent) -mm
> kernels on x86_64.
>
> 2.6.7-gentoo-r11 and 2.6.10-rc1 both work fine (even wine works for the
> most part).
>
> 2.6.9-rc3-mm3 can't run wine -- it always segfaults. Other apps seem OK.
[-- snip --]

This is because of the flex mmap patch for x86-64. You can try the following
workaround from Andi Kleen:

diff -u linux-2.6.10rc1-mm3/kernel/sysctl.c-o
linux-2.6.10rc1-mm3/kernel/sysctl.c
--- linux-2.6.10rc1-mm3/kernel/sysctl.c-o 2004-11-05 11:42:00.000000000 +0100
+++ linux-2.6.10rc1-mm3/kernel/sysctl.c 2004-11-06 13:50:22.000000000 +0100
@@ -147,7 +147,7 @@
#endif

#ifdef HAVE_ARCH_PICK_MMAP_LAYOUT
-int sysctl_legacy_va_layout;
+int sysctl_legacy_va_layout = 1;
#endif

/* /proc declarations: */
Greets,
RJW

--
- Would you tell me, please, which way I ought to go from here?
- That depends a good deal on where you want to get to.
-- Lewis Carroll "Alice's Adventures in Wonderland"
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