From: Nick Piggin <nickpiggin@yahoo.com.au>
To: Rik van Riel <riel@redhat.com>
Cc: linux-kernel@vger.kernel.org,
Andrew Morton <akpm@linux-foundation.org>,
Lee Schermerhorn <lee.schermerhorn@hp.com>,
Kosaki Motohiro <kosaki.motohiro@jp.fujitsu.com>,
linux-mm@kvack.org, Eric Whitney <eric.whitney@hp.com>
Subject: Re: [PATCH -mm 14/24] Ramfs and Ram Disk pages are unevictable
Date: Fri, 13 Jun 2008 03:57:53 +1000 [thread overview]
Message-ID: <200806130357.53669.nickpiggin@yahoo.com.au> (raw)
In-Reply-To: <20080612135014.026cc2e3@cuia.bos.redhat.com>
On Friday 13 June 2008 03:50, Rik van Riel wrote:
> On Fri, 13 Jun 2008 03:37:56 +1000
>
> Nick Piggin <nickpiggin@yahoo.com.au> wrote:
> > > > This isn't the case for brd any longer. It doesn't use the buffer
> > > > cache as its backing store, so the buffer cache is reclaimable.
> > >
> > > I know that pages of files that got paged into the page
> > > cache from the ramdisk can be evicted (back to the ram
> > > disk), but how do the brd pages themselves behave?
> >
> > They are not reclaimable. But they have nothing (directly) to do
> > with brd's i_mapping address space, nor are they put on any LRU
> > lists.
>
> Ahhhh, doh!
>
> I'm mailing Andrew a patch right now that undoes the
> brd.c part of patch 14/24. The ramdisk part is correct
> and should stay (afaict).
The ramfs part? Yes, that looks correct to me.
next prev parent reply other threads:[~2008-06-12 17:58 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-06-11 18:42 [PATCH -mm 00/24] VM pageout scalability improvements (V12) Rik van Riel
2008-06-11 18:42 ` [PATCH -mm 01/24] vmscan: move isolate_lru_page() to vmscan.c Rik van Riel
2008-06-11 18:42 ` [PATCH -mm 02/24] vmscan: Use an indexed array for LRU variables Rik van Riel
2008-06-11 18:42 ` [PATCH -mm 03/24] swap: use an array for the LRU pagevecs Rik van Riel
2008-06-11 18:42 ` [PATCH -mm 04/24] vmscan: free swap space on swap-in/activation Rik van Riel
2008-06-11 18:42 ` [PATCH -mm 05/24] define page_file_cache() function Rik van Riel
2008-06-11 18:42 ` [PATCH -mm 06/24] vmscan: split LRU lists into anon & file sets Rik van Riel
2008-06-13 0:39 ` Hiroshi Shimamoto
2008-06-13 17:48 ` [PATCH] fix printk in show_free_areas Rik van Riel
2008-06-13 20:21 ` [PATCH] collect lru meminfo statistics from correct offset Lee Schermerhorn
2008-06-15 15:07 ` [PATCH] fix printk in show_free_areas KOSAKI Motohiro
2008-06-11 18:42 ` [PATCH -mm 07/24] vmscan: second chance replacement for anonymous pages Rik van Riel
2008-06-11 18:42 ` [PATCH -mm 08/24] vmscan: fix pagecache reclaim referenced bit check Rik van Riel
2008-06-11 18:42 ` [PATCH -mm 09/24] vmscan: add newly swapped in pages to the inactive list Rik van Riel
2008-06-11 18:42 ` [PATCH -mm 10/24] more aggressively use lumpy reclaim Rik van Riel
2008-06-11 18:42 ` [PATCH -mm 11/24] pageflag helpers for configed-out flags Rik van Riel
2008-06-11 20:01 ` Andrew Morton
2008-06-11 20:08 ` Rik van Riel
2008-06-11 20:23 ` Lee Schermerhorn
2008-06-11 20:30 ` Rik van Riel
2008-06-11 20:28 ` Lee Schermerhorn
2008-06-11 20:32 ` Rik van Riel
2008-06-11 20:43 ` Lee Schermerhorn
2008-06-11 20:48 ` Rik van Riel
2008-06-11 18:42 ` [PATCH -mm 12/24] Unevictable LRU Infrastructure Rik van Riel
2008-06-11 18:42 ` [PATCH -mm 13/24] Unevictable LRU Page Statistics Rik van Riel
2008-06-11 18:42 ` [PATCH -mm 14/24] Ramfs and Ram Disk pages are unevictable Rik van Riel
2008-06-12 0:54 ` Nick Piggin
2008-06-12 17:29 ` Rik van Riel
2008-06-12 17:37 ` Nick Piggin
2008-06-12 17:50 ` Rik van Riel
2008-06-12 17:57 ` Nick Piggin [this message]
2008-06-11 18:42 ` [PATCH -mm 15/24] SHM_LOCKED " Rik van Riel
2008-06-11 18:42 ` [PATCH -mm 16/24] mlock: mlocked " Rik van Riel
2008-06-11 18:42 ` [PATCH -mm 17/24] mlock: downgrade mmap sem while populating mlocked regions Rik van Riel
2008-06-11 18:42 ` [PATCH -mm 18/24] mmap: handle mlocked pages during map, remap, unmap Rik van Riel
2008-06-11 18:42 ` [PATCH -mm 19/24] vmstat: mlocked pages statistics Rik van Riel
2008-06-11 18:42 ` [PATCH -mm 20/24] swap: cull unevictable pages in fault path Rik van Riel
2008-06-11 18:42 ` [PATCH -mm 21/24] vmstat: unevictable and mlocked pages vm events Rik van Riel
2008-06-11 18:42 ` [PATCH -mm 22/24] vmscan: unevictable LRU scan sysctl Rik van Riel
2008-06-11 18:42 ` [PATCH -mm 23/24] mlock: count attempts to free mlocked page Rik van Riel
2008-06-11 18:42 ` [PATCH -mm 24/24] doc: unevictable LRU and mlocked pages documentation Rik van Riel
2008-06-12 5:34 ` [PATCH -mm 00/24] VM pageout scalability improvements (V12) Andrew Morton
2008-06-12 13:31 ` Rik van Riel
2008-06-16 5:32 ` KOSAKI Motohiro
2008-06-16 6:20 ` Andrew Morton
2008-06-16 6:22 ` KOSAKI Motohiro
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