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author | Jens Axboe <jens.axboe@oracle.com> | 2010-05-19 21:03:16 +0200 |
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committer | Jens Axboe <jens.axboe@oracle.com> | 2010-05-21 21:12:52 +0200 |
commit | b492e95be0ae672922f4734acf3f5d35c30be948 (patch) | |
tree | a8a1e7f035903796e6b8f626add8d269bf989a35 /block | |
parent | 35f3d14dbbc58447c61e38a162ea10add6b31dc7 (diff) | |
download | linux-3.10-b492e95be0ae672922f4734acf3f5d35c30be948.tar.gz linux-3.10-b492e95be0ae672922f4734acf3f5d35c30be948.tar.bz2 linux-3.10-b492e95be0ae672922f4734acf3f5d35c30be948.zip |
pipe: set lower and upper limit on max pages in the pipe page array
We need at least two to guarantee proper POSIX behaviour, so
never allow a smaller limit than that.
Also expose a /proc/sys/fs/pipe-max-pages sysctl file that allows
root to define a sane upper limit. Make it default to 16 times the
default size, which is 16 pages.
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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