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madvise.2: Document MADV_SOFT_OFFLINE 

This operation was added in Linux 2.6.33.

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
This commit is contained in:
Andi Kleen 2010-06-19 13:02:09 +02:00 committed by Michael Kerrisk
parent 6866d935b3
commit ae24c212b2
1 changed files with 16 additions and 0 deletions
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@ -158,6 +158,22 @@ This feature is intended for memory testing.
This feature is only available if the kernel was configured with
.BR CONFIG_MEMORY_FAILURE .
.TP
.BR MADV_SOFT_OFFLINE " (Since Linux 2.6.33)
Soft offline the pages in the range specified by
.I addr
and
.IR length .
This memory of the page is copied to a new page,
and the page is offlined
(i.e., no longer used, and taken out of noremal memory management).
The
.B MADV_SOFT_OFFLINE
operation is normally invisible to (i.e., does not affect the semantics of)
the calling process.
This feature is intended for testing of memory error-handling code;
it is only available if the kernel was configured with
.BR CONFIG_MEMORY_FAILURE .
.TP
.BR MADV_MERGEABLE " (since Linux 2.6.32)"
Enable Kernel Samepage Merging (KSM) for the pages in the range specified by
.I addr