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SubjectRe: FD Limits

Hi

> Here is a patch of mine to do just what you want. I think it
> is very important to put this patch into the kernel as most modern OS'es
> (Solaris, OSF/1, etc..) have higher limits of at least 1024 per process.
As far as I am aware this will not work at 1024 filedescriptors?

I have put a page on the Web for this at http://www.linux.org.za/tweak.html

This has been working on our cache server for weeks without problems (except
for a power problem), and opens and closes in the region of 3/4 -> 1 million
filedescriptors per day.

Enjoy!

> diff -ur linux-2.0.20-dist/include/linux/fs.h linux-2.0.20-mine/include/linux/fs.h
> --- linux-2.0.20-dist/include/linux/fs.h Fri Sep 13 06:07:08 1996
> +++ linux-2.0.20-mine/include/linux/fs.h Fri Sep 13 20:46:16 1996
> @@ -29,7 +29,7 @@
>
> /* Fixed constants first: */
> #undef NR_OPEN
> -#define NR_OPEN 256
> +#define NR_OPEN 1024
>
> #define NR_SUPER 64
> #define BLOCK_SIZE 1024
> diff -ur linux-2.0.20-dist/include/linux/limits.h linux-2.0.20-mine/include/linux/limits.h
> --- linux-2.0.20-dist/include/linux/limits.h Wed Jul 17 08:10:03 1996
> +++ linux-2.0.20-mine/include/linux/limits.h Fri Sep 13 20:43:31 1996
> @@ -1,12 +1,12 @@
> #ifndef _LINUX_LIMITS_H
> #define _LINUX_LIMITS_H
>
> -#define NR_OPEN 256
> +#define NR_OPEN 1024
>
> #define NGROUPS_MAX 32 /* supplemental group IDs are available */
> #define ARG_MAX 131072 /* # bytes of args + environ for exec() */
> #define CHILD_MAX 999 /* no limit :-) */
> -#define OPEN_MAX 256 /* # open files a process may have */
> +#define OPEN_MAX 1024 /* # open files a process may have */
> #define LINK_MAX 127 /* # links a file may have */
> #define MAX_CANON 255 /* size of the canonical input queue */
> #define MAX_INPUT 255 /* size of the type-ahead buffer */

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