hg: hsx/hotspot-gc/hotspot: 2 new changesets

Igor Veresov igor.veresov at oracle.com
Sat Aug 6 14:32:23 PDT 2011


Yes, but not only that. It basically discards the page, to quote from 
the man page: "Subsequent accesses of pages in this range will succeed, 
but will result either in re-loading of the memory contents from the 
underlying mapped file (see mmap()) or zero-fill-on-demand pages for 
mappings without an underlying file."

igor

On 8/6/11 9:24 AM, Jason Schroeder wrote:
> I thought the benefit of MADV_DONTNEED was to stop Linux from
> writing dirty pages to disk.
>
> On Sat, Aug 6, 2011 at 6:00 AM,<igor.veresov at oracle.com>  wrote:
>> Changeset: a20e6e447d3d
>> Author:    iveresov
>> Date:      2011-08-05 16:44 -0700
>> URL:       http://hg.openjdk.java.net/hsx/hotspot-gc/hotspot/rev/a20e6e447d3d
>>
>> 7060842: UseNUMA crash with UseHugreTLBFS running SPECjvm2008
>> Summary: Use mmap() instead of madvise(MADV_DONTNEED) to uncommit pages
>> Reviewed-by: ysr
>>
>> ! src/os/linux/vm/os_linux.cpp
>>



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