On 12/03/2014 01:42 AM, Mel Gorman wrote: > It is not obvious from the interface that partial page discard requests > are ignored. It should be spelled out.
Thanks, Mel. Applied. Cheers, Michael > Signed-off-by: Mel Gorman <mgor...@suse.de> > --- > man2/posix_fadvise.2 | 5 +++++ > 1 file changed, 5 insertions(+) > > diff --git a/man2/posix_fadvise.2 b/man2/posix_fadvise.2 > index 25d0c50..07313a9 100644 > --- a/man2/posix_fadvise.2 > +++ b/man2/posix_fadvise.2 > @@ -144,6 +144,11 @@ A program may periodically request the kernel to free > cached data > that has already been used, so that more useful cached pages are not > discarded instead. > > +Requests to discard partial pages are ignored. It is preferable to preserve > +needed data than discard unneeded data. If the application requires that > +data be considered for discarding then \fIoffset\fP and \fIlen\fP must be > +page-aligned. > + > Pages that have not yet been written out will be unaffected, so if the > application wishes to guarantee that pages will be released, it should > call > -- Michael Kerrisk Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/ Linux/UNIX System Programming Training: http://man7.org/training/ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
