mirror of https://github.com/mkerrisk/man-pages
shmget.2: Fix kernel version numbers in discussion of SHMALL
Reported-by: Simon Paillard <spaillard@debian.org> Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
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.\" Language and formatting clean-ups
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.\" Added notes on /proc files
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.\"
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.TH SHMGET 2 2014-04-17 "Linux" "Linux Programmer's Manual"
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.TH SHMGET 2 2014-04-28 "Linux" "Linux Programmer's Manual"
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.SH NAME
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shmget \- allocates a System V shared memory segment
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.SH SYNOPSIS
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@ -265,12 +265,11 @@ call:
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.TP
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.B SHMALL
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System wide maximum of shared memory pages.
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Since Linux 2.2, the default value for this limit is
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Since Linux 2.4, the default value for this limit is
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SHMMAX / PAGE_SIZE * (SHMMNI / 16)
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Assuming a 4kB page size, this formula yields (since Linux 2.4) the value
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2^20 (2,097,152).
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Assuming a 4kB page size, this formula yields the value 2^20 (2,097,152).
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On Linux, this limit can be read and modified via
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.IR /proc/sys/kernel/shmall .
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