Fixed markup bugs.
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ef0097a6aa
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dedfd26648
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=197612
@ -407,22 +407,27 @@ The
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.Va vm.overcommit
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sysctl defines the overcommit behaviour of the vm subsystem.
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The virtual memory system always does accounting of the swap space
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reservation, both total for system and per-user. Corresponding values
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reservation, both total for system and per-user.
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Corresponding values
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are available through sysctl
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.Va vm.swap_total,
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.Va vm.swap_total ,
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that gives the total bytes available for swapping, and
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.Va vm.swap_reserved,
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.Va vm.swap_reserved ,
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that gives number of bytes that may be needed to back all currently
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allocated anonymous memory.
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.Pp
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Setting bit 0 of the
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.Va vm.overcommit
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sysctl causes the virtual memory system to return failure
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to the process when allocation of memory causes vm.swap_reserved
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to exceed vm.swap_total.
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Bit 1 of the sysctl enforces RLIMIT_SWAP limit
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to the process when allocation of memory causes
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.Va vm.swap_reserved
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to exceed
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.Va vm.swap_total .
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Bit 1 of the sysctl enforces
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.Dv RLIMIT_SWAP
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limit
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(see
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.Xr getrlimit 2 ).
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.Xr getrlimit 2 ) .
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Root is exempt from this limit.
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Bit 2 allows to count most of the physical
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memory as allocatable, except wired and free reserved pages
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