Re: [PATCH v5 3/3] fadvise: implement POSIX_FADV_NOREUSE
From: Arun Sharma <hidden>
Date: 2012-02-16 19:07:37
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linux-fsdevel, lkml
On 2/16/12 10:57 AM, Andrea Righi wrote:
Maybe we should try to push ...something... in the memcg code for the short-term future, make it as much generic as possible, and for the long-term try to reuse the same feature (totally or in part) in the per-fd approach via fadvise().
Yes - the two approaches are complementary and we should probably pursue both. There are a number of apps which are already using fadvise though: https://issues.apache.org/jira/browse/MAPREDUCE-3289 http://highscalability.com/blog/2012/1/12/peregrine-a-map-reduce-framework-for-iterative-and-pipelined.html and probably many other similar cases that are not open source. Some of these apps may be better off using NOREUSE instead of DONTNEED, since they may not have a clue on what else is going on in the system. The way I think about it: NOREUSE is a statement about what my process is doing and DONTNEED is a statement about the entire system. -Arun -- 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/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>