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Date: Tue, 6 Jul 2010 15:38:09 +0900 From: Minchan Kim <minchan.kim@...il.com> To: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com> Cc: Mel Gorman <mel@....ul.ie>, Andrew Morton <akpm@...ux-foundation.org>, linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org, linux-mm@...ck.org, Dave Chinner <david@...morbit.com>, Chris Mason <chris.mason@...cle.com>, Nick Piggin <npiggin@...e.de>, Rik van Riel <riel@...hat.com>, Johannes Weiner <hannes@...xchg.org>, Christoph Hellwig <hch@...radead.org>, KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>, Andrea Arcangeli <aarcange@...hat.com> Subject: Re: [PATCH 12/14] vmscan: Do not writeback pages in direct reclaim On Tue, Jul 6, 2010 at 3:02 PM, KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com> wrote: >> On Tue, Jul 6, 2010 at 9:36 AM, KOSAKI Motohiro >> <kosaki.motohiro@...fujitsu.com> wrote: >> > Hello, >> > >> >> Ok, that's reasonable as I'm still working on that patch. For example, the >> >> patch disabled anonymous page writeback which is unnecessary as the stack >> >> usage for anon writeback is less than file writeback. >> > >> > How do we examine swap-on-file? >> >> bool is_swap_on_file(struct page *page) >> { >> struct swap_info_struct *p; >> swp_entry_entry entry; >> entry.val = page_private(page); >> p = swap_info_get(entry); >> return !(p->flags & SWP_BLKDEV) >> } > > Well, do you suggested we traverse all pages in lru _before_ > starting vmscan? > No. I don't suggest anything. What I say is just we can do it. If we have to implement it, Couldn't we do it in write_reclaim_page? -- Kind regards, Minchan Kim -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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