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Groups > linux.kernel > #1573531
| From | Shaohua Li <shli@fb.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH V2 4/7] mm: enable MADV_FREE for swapless system |
| Date | 2017-02-04 00:40 +0100 |
| Message-ID | <t6VCq-c7-21@gated-at.bofh.it> (permalink) |
| References | <t6VCp-c7-3@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
Now MADV_FREE pages can be easily reclaimed even for swapless system. We can safely enable MADV_FREE for all systems. Cc: Michal Hocko <mhocko@suse.com> Cc: Minchan Kim <minchan@kernel.org> Cc: Hugh Dickins <hughd@google.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Rik van Riel <riel@redhat.com> Cc: Mel Gorman <mgorman@techsingularity.net> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Shaohua Li <shli@fb.com> --- mm/madvise.c | 8 +------- 1 file changed, 1 insertion(+), 7 deletions(-) diff --git a/mm/madvise.c b/mm/madvise.c index c24549e..fe40e93 100644 --- a/mm/madvise.c +++ b/mm/madvise.c @@ -579,13 +579,7 @@ madvise_vma(struct vm_area_struct *vma, struct vm_area_struct **prev, case MADV_WILLNEED: return madvise_willneed(vma, prev, start, end); case MADV_FREE: - /* - * XXX: In this implementation, MADV_FREE works like - * MADV_DONTNEED on swapless system or full swap. - */ - if (get_nr_swap_pages() > 0) - return madvise_free(vma, prev, start, end); - /* passthrough */ + return madvise_free(vma, prev, start, end); case MADV_DONTNEED: return madvise_dontneed(vma, prev, start, end); default: -- 2.9.3
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[PATCH V2 0/7] mm: fix some MADV_FREE issues Shaohua Li <shli@fb.com> - 2017-02-04 00:40 +0100
[PATCH V2 5/7] mm: add vmstat account for MADV_FREE pages Shaohua Li <shli@fb.com> - 2017-02-04 00:40 +0100
Re: [PATCH V2 5/7] mm: add vmstat account for MADV_FREE pages Michal Hocko <mhocko@kernel.org> - 2017-02-10 14:30 +0100
[PATCH V2 4/7] mm: enable MADV_FREE for swapless system Shaohua Li <shli@fb.com> - 2017-02-04 00:40 +0100
[PATCH V2 6/7] proc: show MADV_FREE pages info in smaps Shaohua Li <shli@fb.com> - 2017-02-04 00:40 +0100
Re: [PATCH V2 6/7] proc: show MADV_FREE pages info in smaps Michal Hocko <mhocko@kernel.org> - 2017-02-10 15:10 +0100
[PATCH V2 3/7] mm: reclaim MADV_FREE pages Shaohua Li <shli@fb.com> - 2017-02-04 00:40 +0100
Re: [PATCH V2 3/7] mm: reclaim MADV_FREE pages Minchan Kim <minchan@kernel.org> - 2017-02-10 08:00 +0100
Re: [PATCH V2 3/7] mm: reclaim MADV_FREE pages Minchan Kim <minchan@kernel.org> - 2017-02-13 06:10 +0100
Re: [PATCH V2 3/7] mm: reclaim MADV_FREE pages Michal Hocko <mhocko@kernel.org> - 2017-02-10 14:30 +0100
[PATCH V2 1/7] mm: don't assume anonymous pages have SwapBacked flag Shaohua Li <shli@fb.com> - 2017-02-04 00:40 +0100
[PATCH V2 7/7] mm: add a separate RSS for MADV_FREE pages Shaohua Li <shli@fb.com> - 2017-02-04 00:40 +0100
Re: [PATCH V2 7/7] mm: add a separate RSS for MADV_FREE pages Michal Hocko <mhocko@kernel.org> - 2017-02-10 14:40 +0100
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