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SubjectRe: 2.6.23-rc3-mm1 - memory layout change? - lost support for MAP_32BIT? - mono crashes
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On Wed, 2007-08-22 at 02:06 -0700, Andrew Morton wrote:
> ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.23-rc3/2.6.23-rc3-mm1/

After installing this new wonder kernel on my AMD-64 laptop, I
discovered that Beagle wouldn't start. While enjoying how fast my
system felt ( :) ) I also discovered that Evolution wouldn't start
because it was built with mono integration.

Can't live without email, so I poked at it and discovered that if I run
mono applications (including Evolution) with the legacy memory layout,
they work.

Like this: setarch x86_64 -L evolution

This didn't happen on -rc2-mm2, so I think somebody changed something.
Mono claims to mmap with the MAP_32BIT option.

In -rc3-mm1 strace shows mono's mmap like this:
mmap(NULL, 65536, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_ANONYMOUS|MAP_32BIT, -1, 0) = 0x7fa21f5cb000

It's got MAP_32BIT, but that's not a 32-bit address...
--
Zan Lynx <zlynx@acm.org>
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