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Date: Fri, 6 Jun 2008 18:04:39 -0700
From: Andrew Morton <akpm@...ux-foundation.org>
To: Rik van Riel <riel@...hat.com>
Cc: linux-kernel@...r.kernel.org, lee.schermerhorn@...com,
kosaki.motohiro@...fujitsu.com, Lee.Schermerhorn@...com
Subject: Re: [PATCH -mm 06/25] split LRU lists into anon & file sets
On Fri, 06 Jun 2008 16:28:44 -0400
Rik van Riel <riel@...hat.com> wrote:
> From: Rik van Riel <riel@...hat.com>
>
> Split the LRU lists in two, one set for pages that are backed by
> real file systems ("file") and one for pages that are backed by
> memory and swap ("anon"). The latter includes tmpfs.
>
> Eventually mlocked pages will be taken off the LRUs alltogether.
> A patch for that already exists and just needs to be integrated
> into this series.
>
> This patch mostly has the infrastructure and a basic policy to
> balance how much we scan the anon lists and how much we scan
> the file lists. The big policy changes are in separate patches.
>
The changelogs are a bit scrappy and could do with some care
- stale assertions such as the above
- "From:<random number of spaces>Lee" in various places
- Some have the --- separator and others don't (this trips me up).
- Stuff like "Against: 2.6.26-rc2-mm1" right in the middle of the
changelog for me to hunt down and squish.
- "TODO: DEBUGGING ONLY: NOT FOR UPSTREAM MERGE" <<-- what's up with this?
- random Capitalisation in Various patch Titles.
- "V2 -> V3:" logging in the main changelog - not relevant in the
final commit hence more for me to edit away.
- Strange inventions like "Originally Signed-off-by:"
- please prefer to prefix the patch titles with a suitable subsystem
identifier. In this case "vmscan: " would suit.
- Other stuff I forgot. A general recheck and cleanup would be nice.
I've actually fixed all ofthe above but I don't yet know whether
I'll be checking all this in.
> Index: linux-2.6.26-rc2-mm1/fs/proc/proc_misc.c
> ===================================================================
> --- linux-2.6.26-rc2-mm1.orig/fs/proc/proc_misc.c 2008-05-23 14:21:21.000000000 -0400
> +++ linux-2.6.26-rc2-mm1/fs/proc/proc_misc.c 2008-05-23 14:21:34.000000000 -0400
> @@ -132,6 +132,10 @@ static int meminfo_read_proc(char *page,
> unsigned long allowed;
> struct vmalloc_info vmi;
> long cached;
> + unsigned long inactive_anon;
> + unsigned long active_anon;
> + unsigned long inactive_file;
> + unsigned long active_file;
Shouldn't this be an array[NR_LRU_LISTS]?
> /*
> * display in kilobytes.
> @@ -150,48 +154,61 @@ static int meminfo_read_proc(char *page,
>
> get_vmalloc_info(&vmi);
>
> + inactive_anon = global_page_state(NR_INACTIVE_ANON);
> + active_anon = global_page_state(NR_ACTIVE_ANON);
> + inactive_file = global_page_state(NR_INACTIVE_FILE);
> + active_file = global_page_state(NR_ACTIVE_FILE);
then this can perhaps become a loop.
> /*
> * Tagged format, for easy grepping and expansion.
> */
> len = sprintf(page,
> - "MemTotal: %8lu kB\n"
> - "MemFree: %8lu kB\n"
> - "Buffers: %8lu kB\n"
> - "Cached: %8lu kB\n"
> - "SwapCached: %8lu kB\n"
> - "Active: %8lu kB\n"
> - "Inactive: %8lu kB\n"
> + "MemTotal: %8lu kB\n"
> + "MemFree: %8lu kB\n"
> + "Buffers: %8lu kB\n"
> + "Cached: %8lu kB\n"
> + "SwapCached: %8lu kB\n"
> + "Active: %8lu kB\n"
> + "Inactive: %8lu kB\n"
> + "Active(anon): %8lu kB\n"
> + "Inactive(anon): %8lu kB\n"
> + "Active(file): %8lu kB\n"
> + "Inactive(file): %8lu kB\n"
> #ifdef CONFIG_HIGHMEM
> - "HighTotal: %8lu kB\n"
> - "HighFree: %8lu kB\n"
> - "LowTotal: %8lu kB\n"
> - "LowFree: %8lu kB\n"
> -#endif
> - "SwapTotal: %8lu kB\n"
> - "SwapFree: %8lu kB\n"
> - "Dirty: %8lu kB\n"
> - "Writeback: %8lu kB\n"
> - "AnonPages: %8lu kB\n"
> - "Mapped: %8lu kB\n"
> - "Slab: %8lu kB\n"
> - "SReclaimable: %8lu kB\n"
> - "SUnreclaim: %8lu kB\n"
> - "PageTables: %8lu kB\n"
> - "NFS_Unstable: %8lu kB\n"
> - "Bounce: %8lu kB\n"
> - "WritebackTmp: %8lu kB\n"
> - "CommitLimit: %8lu kB\n"
> - "Committed_AS: %8lu kB\n"
> - "VmallocTotal: %8lu kB\n"
> - "VmallocUsed: %8lu kB\n"
> - "VmallocChunk: %8lu kB\n",
> + "HighTotal: %8lu kB\n"
> + "HighFree: %8lu kB\n"
> + "LowTotal: %8lu kB\n"
> + "LowFree: %8lu kB\n"
> +#endif
> + "SwapTotal: %8lu kB\n"
> + "SwapFree: %8lu kB\n"
> + "Dirty: %8lu kB\n"
> + "Writeback: %8lu kB\n"
> + "AnonPages: %8lu kB\n"
> + "Mapped: %8lu kB\n"
> + "Slab: %8lu kB\n"
> + "SReclaimable: %8lu kB\n"
> + "SUnreclaim: %8lu kB\n"
> + "PageTables: %8lu kB\n"
> + "NFS_Unstable: %8lu kB\n"
> + "Bounce: %8lu kB\n"
> + "WritebackTmp: %8lu kB\n"
> + "CommitLimit: %8lu kB\n"
> + "Committed_AS: %8lu kB\n"
> + "VmallocTotal: %8lu kB\n"
> + "VmallocUsed: %8lu kB\n"
> + "VmallocChunk: %8lu kB\n",
> K(i.totalram),
> K(i.freeram),
> K(i.bufferram),
> K(cached),
> K(total_swapcache_pages),
> - K(global_page_state(NR_ACTIVE)),
> - K(global_page_state(NR_INACTIVE)),
> + K(active_anon + active_file),
> + K(inactive_anon + inactive_file),
> + K(active_anon),
> + K(inactive_anon),
> + K(active_file),
> + K(inactive_file),
Do we really want to put all this stuff into /proc/meminfo?
Would it be better to aggregate it in some manner for meminfo and show
the fine-grained info in /proc/vmstat?
--
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