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tmpfs.5: Document 'huge' mount options 

Based on text from Documentation/vm/transhuge.txt.

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
This commit is contained in:
Michael Kerrisk 2018-02-04 09:25:26 +01:00
parent e121158211
commit b230d246b2
1 changed files with 12 additions and 6 deletions
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@ -144,22 +144,28 @@ value is one of the following:
.RS .RS
.TP .TP
.B never .B never
Do not allocate huge pages.
This is the default.
.TP .TP
.B always .B always
Attempt to allocate huge pages every time a new page is needed.
.TP .TP
.B within_size .B within_size
Only allocate huge page if it will be fully within
.IR i_size .
Also respect
.BR fadvise (2)/ madvise (2)
hints
.TP .TP
.B advise .B advise
Only allocate huge pages if requested with
.BR fadvise (2)/ madvise (2).
.TP .TP
.B deny .B deny
For use in emergencies, to force the huge option off from all mounts.
.TP .TP
.B force .B force
Force the huge option on for all mounts; useful for testing.
.RE .RE
.TP .TP
.BR mpol "=\fImpol_option\fR (since Linux 2.6.15)" .BR mpol "=\fImpol_option\fR (since Linux 2.6.15)"