Re: [RFC][PATCH 1/3] tracking dirty pages in shared mappings -V4

[Andy Whitcroft <apw@shadowen.org>]

Andrew Morton wrote:
> Linus Torvalds <torvalds@osdl.org> wrote:
> 
>>What happened to the VM stress-test programs that we used to test the 
>>page-out with? I forget who kept a collection of them around, but they did 
>>things like trying to cause MM problems on purpose.
> 
> 
> I think that was me, back in my programming days.
> 
> 
>>And I'm pretty sure 
>>some of the nastiest ones used shared mappings, exactly because we've had 
>>problems with the virtual scanning.
> 
> 
> http://www.zip.com.au/~akpm/linux/patches/stuff/ext3-tools.tar.gz
> 
> run-bash-shared-mapping.sh is a good stress-tester and deadlock-finder.
> 
> Running fsx-linux (in mmap-read and mmap-write and read and write mode) in
> combination with memory pressure is a good correctness-tester.  Needs to be
> run on various filesystems too.

Well for what its worth (and from this thread it may not be that much)
the testing I did over night shows green across all the test boxes I
have.  The tests do include fsx-linux across a limited range of filesystems.

I'll see if I can get the other one done.

-apw

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