Re: [Lsf-pc] [LSF/MM ATTEND] Memory management -- THP, hugetlb, scalability

[Mel Gorman <mgorman@suse.de>]

On Fri, Jan 03, 2014 at 02:25:09PM +0200, Kirill A. Shutemov wrote:
> Hi,
> 
> I would like to attend LSF/MM summit. I'm interested in discussion about
> huge pages, scalability of memory management subsystem and persistent
> memory.
> 
> Last year I did some work to fix THP-related regressions and improve
> scalability. I also work on THP for file-backed pages.
> 
> Depending on project status, I probably want to bring transparent huge
> pagecache as a topic.
> 

I think transparent huge pagecache is likely to crop up for more than one
reason. There is the TLB issue and the motivation that i-TLB pressure is
a problem in some specialised cases. Whatever the merits of that case,
transparent hugepage cache has been raised as a potential solution for
some VM scalability problems. I recognise that dealing with large numbers
of struct pages is now a problem on larger machines (although I have not
seen quantified data on the problem nor do I have access to a machine large
enough to measure it myself) but I'm wary of transparent hugepage cache
being treated as a primary solution for VM scalability problems. Lacking
performance data I have no suggestions on what these alternative solutions
might look like.

-- 
Mel Gorman
SUSE Labs

--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org.  For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>