Messages in this thread | | | Date | Fri, 23 May 2008 20:56:30 -0400 | From | Rik van Riel <> | Subject | Re: Pipe buffers' limit of 16 * 4K |
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On Fri, 23 May 2008 21:19:13 -0300 "Fausto Richetti Blanco" <fausto.blanco@gmail.com> wrote:
> Hello guys, > > I'm working with a 2.6.9 kernel (ok, I know it's quite old) and > faced a problem with the 4K (one page) buffer limit for the pipes. > I've found that in the 2.6.11 the pipes' buffers were changed to a > circular list of pages which increased this limit to 16 * 4K. This > limit is hardcoded here /usr/src/linux/include/linux/pipe_fs_i.h:6 > #define PIPE_BUFFERS (16) > > Is there a reason for this not to be an adjustable parameter > (eg.: by an ulimit in the userspace) ?
What is the problem you found?
Why do you need to change the limit from 16?
Did it bring you any performance enhancements?
If so, how much?
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