madvise: update function comment of madvise_dontneed
Signed-off-by: Fernando Luis Vazquez Cao <fernando@oss.ntt.co.jp> Cc: Hugh Dickins <hugh@veritas.com> Cc: Nick Piggin <nickpiggin@yahoo.com.au> Cc: Rik van Riel <riel@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -132,10 +132,10 @@ static long madvise_willneed(struct vm_area_struct * vma,
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* Application no longer needs these pages. If the pages are dirty,
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* Application no longer needs these pages. If the pages are dirty,
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* it's OK to just throw them away. The app will be more careful about
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* it's OK to just throw them away. The app will be more careful about
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* data it wants to keep. Be sure to free swap resources too. The
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* data it wants to keep. Be sure to free swap resources too. The
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* zap_page_range call sets things up for refill_inactive to actually free
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* zap_page_range call sets things up for shrink_active_list to actually free
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* these pages later if no one else has touched them in the meantime,
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* these pages later if no one else has touched them in the meantime,
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* although we could add these pages to a global reuse list for
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* although we could add these pages to a global reuse list for
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* refill_inactive to pick up before reclaiming other pages.
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* shrink_active_list to pick up before reclaiming other pages.
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*
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*
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* NB: This interface discards data rather than pushes it out to swap,
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* NB: This interface discards data rather than pushes it out to swap,
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* as some implementations do. This has performance implications for
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* as some implementations do. This has performance implications for
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