Messages in this thread | | | Date | Fri, 03 Jan 2003 23:34:21 +0000 | From | "A.D.F." <> | Subject | TCP Zero Copy for mmapped files |
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FreeBSD 5.0 should already have a zero copy for mmapped files and IMHO it would be worth to have it in Linux 2.6 too.
It would also be very nice to be able to enable zero copy for mmapped files by a config option.
Many applications use mapped memory to serve lots of small and medium sized files (4 - 1024 KB) or even a few big files (think at web servers, i.e. Apache 2, etc.); this is done to better serve multiple / parallel downloads being done on the same files.
Using or not using mmap() is a userland / application choice that depends on lots of factors / strategies that are outside kernel scope.
Besides this there seems to be some work in progress to speed up mmap() calls, thus why not doing all the work right ?
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