[patches] threaded vma patches (was Re: missing madvise functionality)

[Nick Piggin <nickpiggin@yahoo.com.au>]

Eric Dumazet wrote:
> Nick Piggin a ecrit :
> 
>> Eric Dumazet wrote:
>>
>>>
>>> I do think such workloads might benefit from a vma_cache not shared 
>>> by all threads but private to each thread. A sequence could 
>>> invalidate the cache(s).
>>>
>>> ie instead of a mm->mmap_cache, having a mm->sequence, and each 
>>> thread having a current->mmap_cache and current->mm_sequence
>>
>>
>> I have a patchset to do exactly this, btw.
> 
> 
> Could you repost it please ?

Sure. I'll send you them privately because they're against an older
kernel.

>> Anyway what is the status of the private futex work. I don't think that
>> is very intrusive or complicated, so it should get merged ASAP (so then
>> at least we have the interface there).
>>
> 
> It seems nobody but you and me cared.

Sad. Although Ulrich did seem interested at one point I think? Ulrich,
do you agree at least with the interface that Eric is proposing? If
yes, then Andrew, do you have any objections to putting Eric's fairly
important patch at least into -mm?

-- 
SUSE Labs, Novell Inc.

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