On Thu, 2007-08-23 at 11:28 +0200, Jiri Kosina wrote: > On Wed, 22 Aug 2007, Zan Lynx wrote: > > > 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. > [...] > > 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 > > Hi Zan, > > thanks for an excellent bugreport. Rather than throwing the whole > pie-randomization and flexmmap support away, could you please test the > patch below and let me know whether it fixes all your issues? Thanks. > > > From: Jiri Kosina <[email protected]> > > Handle MAP_32BIT flags properly in x86_64 flexmmap > > We need to handle MAP_32BIT flags of mmap() properly for 64bit > applications with filexible mmap layout. > > This patch introduces x86_64-specific version of > arch_get_unmapped_area_topdown() which differs from the generic one in > handling of the MAP_32BIT flag -- when this flag is passed to mmap(), we > stick back to the legacy layout for this particular mmap, which gives > proper 32bit range. > > Signed-off-by: Jiri Kosina <[email protected]> [snip patch] This does fix the mono problem. Thank you. -- Zan Lynx <[email protected]>
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- References:
- 2.6.23-rc3-mm1
- From: Andrew Morton <[email protected]>
- Re: 2.6.23-rc3-mm1 - memory layout change? - lost support for MAP_32BIT? - mono crashes
- From: Zan Lynx <[email protected]>
- Re: 2.6.23-rc3-mm1 - memory layout change? - lost support for MAP_32BIT? - mono crashes
- From: Jiri Kosina <[email protected]>
- 2.6.23-rc3-mm1
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