Messages in this thread | | | Date | Thu, 30 Mar 2006 16:38:10 +0200 | From | Jens Axboe <> | Subject | Re: [PATCH][RFC] splice support |
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On Thu, Mar 30 2006, KAMEZAWA Hiroyuki wrote: > On Thu, 30 Mar 2006 15:53:46 +0200 > Jens Axboe <axboe@suse.de> wrote: > > > > I don't know about sendfile() but this looks client can hold server's > > > memory, when server uses sendfile() 64k/conn. > > > > You mean when the server uses splice, 64kb (well 16 pages actually) / > > connection? That's a correct observation, I wouldn't think that pinning > > that small a number of pages is likely to cause any issues. At least I > > can think of much worse pinning by just doing IO :-) > > > My point is consumer can sleep forever and pages are pinnded forever. > And people who use splice() will not notice they are pinning pages. > > But as you say, it's not problem in usual situation. > Maybe I'm too pessimistic how my cusomers play with Linux ;)
It's a valid concern, however as mentioned there's a number of ways in which a user can pin memory already. Perhaps this general problem should be capped elsewhere?
-- Jens Axboe
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