Messages in this thread | | | Subject | Re: variable fd array patch for 2.1.90 | From | Andreas Schwab <> | Date | 30 Mar 1998 10:42:47 +0200 |
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Bill Hawes <whawes@star.net> writes:
|> The attached patch provides for variable-sized fd arrays, automatically |> expanding from a small default (32 files) to the full 1024 when needed. This |> results in a significant savings of non-pageable kernel memory (about 35 pages |> just for the system tasks), and should significantly speed up process forking |> when fewer than 32 files are used.
|> The patch adds an FDSize: entry to the /proc/pid/status output so you can |> monitor which tasks are using more files. (As discussed previously on the list |> here, the bash shell opens fd 255 and therefore requires a full fd array.)
How about expanding the fd array in more steps, perhaps 32 -> 256 -> 1024? Or make the default 64 files, and Bash could be changed to use fd 63 instead (it already allocates from 63 downward for process substitutions).
-- Andreas Schwab "And now for something schwab@issan.informatik.uni-dortmund.de completely different" schwab@gnu.org
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