From: Christoph Lameter <clameter@sgi.com>
To: Andrea Arcangeli <andrea@suse.de>
Cc: David Chinner <dgc@sgi.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
Nathan Scott <nscott@aconex.com>,
Nick Piggin <nickpiggin@yahoo.com.au>, Mel Gorman <mel@skynet.ie>,
linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
Christoph Hellwig <hch@lst.de>,
William Lee Irwin III <wli@holomorphy.com>,
Jens Axboe <jens.axboe@oracle.com>,
Badari Pulavarty <pbadari@gmail.com>,
Maxim Levitsky <maximlevitsky@gmail.com>,
Fengguang Wu <fengguang.wu@gmail.com>,
swin wang <wangswin@gmail.com>,
totty.lu@gmail.com, hugh@veritas.com, joern@lazybastard.org
Subject: Re: [00/41] Large Blocksize Support V7 (adds memmap support)
Date: Thu, 20 Sep 2007 11:11:56 -0700 (PDT) [thread overview]
Message-ID: <Pine.LNX.4.64.0709201108070.8626@schroedinger.engr.sgi.com> (raw)
In-Reply-To: <20070920145407.GY4608@v2.random>
On Thu, 20 Sep 2007, Andrea Arcangeli wrote:
> The only point of this largepage stuff is to go an extra mile to save
> a bit more of cpu vs a strict vmap based solution (fsblock of course
> will be smart enough that if it notices the PAGE_SIZE is >= blocksize
> it doesn't need to run any vmap at all and it can just use the direct
> mapping, so vmap translates in 1 branch only to check the blocksize
> variable, PAGE_SIZE is immediate in the .text at compile time). But if
Hmmm.. You are not keeping up with things? Heard of virtual compound
pages? They only require a vmap when the page allocator fails a
larger order allocation (which we have established is rare to the point
of nonexistence). The next rev of large blocksize will use that for
fallback. Plus vcompounds can be used to get rid of most uses of vmalloc
reducing the need for virtual mapping in general.
Largeblock is a general solution for managing large data sets using a
single page struct. See the original message that started this thread. It
can be used for various other subsystems like vcompound can.
next prev parent reply other threads:[~2007-09-20 18:11 UTC|newest]
Thread overview: 187+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-09-11 6:03 [00/41] Large Blocksize Support V7 (adds memmap support) Christoph Lameter
2007-09-10 18:52 ` Nick Piggin
2007-09-11 12:05 ` Andrea Arcangeli
2007-09-11 20:03 ` Christoph Lameter
2007-09-11 12:12 ` Jörn Engel
2007-09-10 21:13 ` Nick Piggin
2007-09-11 16:02 ` Goswin von Brederlow
2007-09-11 20:07 ` Christoph Lameter
2007-09-11 20:29 ` Jörn Engel
2007-09-11 20:41 ` Christoph Lameter
2007-09-11 23:26 ` Andrea Arcangeli
2007-09-12 0:04 ` Christoph Lameter
2007-09-12 8:20 ` Andrea Arcangeli
2007-09-15 8:44 ` Andrew Morton
2007-09-15 12:14 ` Goswin von Brederlow
2007-09-15 15:51 ` Andrea Arcangeli
2007-09-15 20:14 ` Goswin von Brederlow
2007-09-15 22:30 ` Andrea Arcangeli
2007-09-16 13:54 ` Goswin von Brederlow
2007-09-16 15:08 ` Andrea Arcangeli
2007-09-16 21:08 ` Mel Gorman
2007-09-16 22:48 ` Goswin von Brederlow
2007-09-17 9:30 ` Mel Gorman
2007-09-16 17:46 ` Jörn Engel
2007-09-16 18:15 ` Linus Torvalds
2007-09-16 18:21 ` Jörn Engel
2007-09-16 18:44 ` Linus Torvalds
2007-09-16 22:51 ` Goswin von Brederlow
2007-09-23 17:44 ` Jörn Engel
2007-09-16 22:06 ` Goswin von Brederlow
2007-09-16 22:40 ` Jörn Engel
2007-09-16 18:15 ` Mel Gorman
2007-09-16 18:50 ` Andrea Arcangeli
2007-09-16 20:54 ` Mel Gorman
2007-09-16 21:31 ` Andrea Arcangeli
2007-09-17 10:13 ` Mel Gorman
2007-09-23 5:50 ` Goswin von Brederlow
2007-09-16 22:56 ` Goswin von Brederlow
2007-09-18 19:31 ` Andrea Arcangeli
2007-09-23 6:56 ` Goswin von Brederlow
2007-09-24 15:39 ` Andrea Arcangeli
2007-09-16 18:13 ` Mel Gorman
2007-09-16 9:03 ` Nick Piggin
2007-09-17 22:00 ` Christoph Lameter
2007-09-18 0:11 ` Nick Piggin
2007-09-18 20:36 ` Christoph Lameter
2007-09-18 10:00 ` Mel Gorman
2007-09-18 10:49 ` Jörn Engel
2007-09-18 12:31 ` David Chinner
2007-09-16 21:58 ` Goswin von Brederlow
2007-09-17 10:03 ` Mel Gorman
2007-09-23 6:22 ` Goswin von Brederlow
2007-09-24 12:32 ` Kyle Moffett
2007-09-16 17:53 ` Jörn Engel
2007-09-16 21:31 ` Mel Gorman
2007-09-17 22:03 ` Christoph Lameter
2007-09-11 15:36 ` Mel Gorman
2007-09-11 1:44 ` Nick Piggin
2007-09-11 20:11 ` Christoph Lameter
2007-09-11 4:53 ` Nick Piggin
2007-09-11 20:42 ` Christoph Lameter
2007-09-11 5:30 ` Nick Piggin
2007-09-11 21:41 ` Christoph Lameter
2007-09-11 6:06 ` Nick Piggin
2007-09-11 21:52 ` Christoph Lameter
2007-09-11 18:07 ` Nick Piggin
2007-09-12 23:06 ` Christoph Lameter
2007-09-13 20:51 ` Nick Piggin
2007-09-14 17:52 ` Christoph Lameter
2007-09-16 8:22 ` Nick Piggin
2007-09-17 22:05 ` Christoph Lameter
2007-09-18 0:10 ` Nick Piggin
2007-09-18 20:42 ` Christoph Lameter
2007-09-17 11:10 ` Bernd Schmidt
2007-09-17 22:10 ` Christoph Lameter
2007-09-14 16:10 ` Goswin von Brederlow
2007-09-14 17:42 ` Mel Gorman
2007-09-15 0:31 ` Goswin von Brederlow
2007-09-16 21:16 ` Mel Gorman
2007-09-16 22:38 ` Goswin von Brederlow
2007-09-17 8:57 ` Mel Gorman
2007-09-23 6:49 ` Goswin von Brederlow
2007-09-11 20:53 ` Mel Gorman
2007-09-11 6:00 ` Nick Piggin
2007-09-11 21:48 ` Christoph Lameter
2007-09-11 6:17 ` Nick Piggin
2007-09-12 0:00 ` Christoph Lameter
2007-09-12 2:46 ` Nick Piggin
2007-09-12 23:17 ` Christoph Lameter
2007-09-13 9:40 ` Mel Gorman
2007-09-14 2:38 ` Christoph Lameter
2007-09-13 21:20 ` Nick Piggin
2007-09-14 18:08 ` Christoph Lameter
2007-09-14 18:15 ` Christoph Lameter
2007-09-15 0:33 ` Goswin von Brederlow
2007-09-16 8:53 ` Nick Piggin
2007-09-17 22:21 ` Christoph Lameter
2007-09-18 1:16 ` Nick Piggin
2007-09-18 18:30 ` Linus Torvalds
2007-09-18 17:53 ` Nick Piggin
2007-09-18 19:18 ` Andrea Arcangeli
2007-09-18 19:44 ` Linus Torvalds
2007-09-19 0:58 ` Nathan Scott
2007-09-19 1:06 ` Linus Torvalds
2007-09-19 2:45 ` Nathan Scott
2007-09-19 5:09 ` David Chinner
2007-09-19 9:41 ` Alex Tomas
2007-09-19 14:04 ` Andrea Arcangeli
2007-09-20 1:38 ` David Chinner
2007-09-20 14:54 ` Andrea Arcangeli
2007-09-20 18:11 ` Christoph Lameter [this message]
2007-09-20 18:07 ` Christoph Lameter
2007-09-21 20:41 ` Hugh Dickins
2007-09-24 21:13 ` Christoph Lameter
2007-09-28 2:46 ` Nick Piggin
2007-09-19 3:41 ` Rene Herman
2007-09-19 3:50 ` Linus Torvalds
2007-09-19 4:26 ` Rene Herman
2007-09-19 4:33 ` Linus Torvalds
2007-09-19 4:56 ` Rene Herman
2007-09-11 21:54 ` Mel Gorman
2007-09-12 14:29 ` Martin J. Bligh
2007-09-12 1:49 ` David Chinner
2007-09-11 15:27 ` Nick Piggin
2007-09-13 1:49 ` David Chinner
2007-09-12 17:23 ` Nick Piggin
2007-09-13 13:03 ` David Chinner
2007-09-13 2:01 ` Nick Piggin
2007-09-13 20:48 ` Nick Piggin
2007-09-17 4:07 ` David Chinner
2007-09-16 21:13 ` Nick Piggin
2007-09-12 2:01 ` Nick Piggin
2007-09-11 21:35 ` Christoph Lameter
2007-09-11 16:47 ` Andrea Arcangeli
2007-09-11 18:31 ` Mel Gorman
2007-09-11 2:26 ` Nick Piggin
2007-09-11 18:25 ` Maxim Levitsky
2007-09-11 3:05 ` Nick Piggin
2007-09-11 21:03 ` Mel Gorman
2007-09-11 19:20 ` Andrea Arcangeli
2007-09-11 20:19 ` Jörn Engel
2007-09-11 20:13 ` Christoph Lameter
2007-09-11 20:01 ` Christoph Lameter
2007-09-11 4:43 ` Nick Piggin
2007-09-11 5:17 ` Nick Piggin
2007-09-11 21:27 ` Mel Gorman
2007-09-11 6:03 ` [01/41] Pagecache zeroing: zero_user_segment, zero_user_segments and zero_user Christoph Lameter
2007-09-11 6:03 ` [02/41] Define functions for page cache handling Christoph Lameter
2007-09-11 6:03 ` [03/41] Use page_cache_xxx functions in mm/filemap.c Christoph Lameter
2007-09-11 6:03 ` [04/41] Use page_cache_xxx in mm/page-writeback.c Christoph Lameter
2007-09-11 6:03 ` [05/41] Use page_cache_xxx in mm/truncate.c Christoph Lameter
2007-09-11 6:03 ` [06/41] Use page_cache_xxx in mm/rmap.c Christoph Lameter
2007-09-11 6:03 ` [07/41] Use page_cache_xxx in mm/filemap_xip.c Christoph Lameter
2007-09-11 6:03 ` [08/41] Use page_cache_xxx in mm/migrate.c Christoph Lameter
2007-09-11 6:03 ` [09/41] Use page_cache_xxx in fs/libfs.c Christoph Lameter
2007-09-11 6:04 ` [10/41] Use page_cache_xxx in fs/sync Christoph Lameter
2007-09-11 6:04 ` [11/41] Use page_cache_xxx in fs/buffer.c Christoph Lameter
2007-09-11 6:04 ` [12/41] Use page_cache_xxx in mm/mpage.c Christoph Lameter
2007-09-11 6:04 ` [13/41] Use page_cache_xxx in mm/fadvise.c Christoph Lameter
2007-09-11 6:04 ` [14/41] Use page_cache_xxx in fs/splice.c Christoph Lameter
2007-09-11 6:04 ` [15/41] Use page_cache_xxx in ext2 Christoph Lameter
2007-09-11 6:04 ` [16/41] Use page_cache_xxx in fs/ext3 Christoph Lameter
2007-09-11 6:04 ` [17/41] Use page_cache_xxx in fs/ext4 Christoph Lameter
2007-09-11 6:04 ` [18/41] Use page_cache_xxx in fs/reiserfs Christoph Lameter
2007-09-11 6:04 ` [19/41] Use page_cache_xxx for fs/xfs Christoph Lameter
2007-09-11 6:04 ` [20/41] Use page_cache_xxx in drivers/block/rd.c Christoph Lameter
2007-09-11 6:04 ` [21/41] compound pages: Better PageHead/PageTail handling Christoph Lameter
2007-09-11 6:04 ` [22/41] compound pages: Add new support functions Christoph Lameter
2007-09-11 6:04 ` [23/41] compound pages: vmstat support Christoph Lameter
2007-09-11 6:04 ` [24/41] compound pages: Use new compound vmstat functions in SLUB Christoph Lameter
2007-09-11 6:04 ` [25/41] compound pages: Allow use of get_page_unless_zero with compound pages Christoph Lameter
2007-09-11 6:04 ` [26/41] compound pages: Allow freeing of compound pages via pagevec Christoph Lameter
2007-09-11 6:04 ` [27/41] Large page order operations, zeroing and flushing Christoph Lameter
2007-09-11 6:04 ` [28/41] Futex: Fix PAGE SIZE assumption Christoph Lameter
2007-09-11 6:04 ` [29/41] Fix up reclaim counters Christoph Lameter
2007-09-11 6:04 ` [30/41] Add VM_BUG_ONs to check for correct page order Christoph Lameter
2007-09-11 6:04 ` [31/41] Large Blocksize: Core piece Christoph Lameter
2007-09-11 6:04 ` [32/41] Readahead changes to support large blocksize Christoph Lameter
2007-09-11 6:04 ` [33/41] Large blocksize support in ramfs Christoph Lameter
2007-09-11 6:04 ` [34/41] Large blocksize support for XFS Christoph Lameter
2007-09-11 6:04 ` [35/41] Reiserfs: Fix up mapping_set_gfp_mask() Christoph Lameter
2007-09-11 6:04 ` [36/41] 64k block size support for Ext2/3/4 Christoph Lameter
2007-09-11 6:04 ` [37/41] ext2: fix rec_len overflow for 64KB block size Christoph Lameter
2007-09-11 6:04 ` [38/41] ext3: fix rec_len overflow with " Christoph Lameter
2007-09-11 6:04 ` [39/41] ext4: fix rec_len overflow for " Christoph Lameter
2007-09-11 6:04 ` [40/41] Do not use f_mapping in simple_prepare_write() Christoph Lameter
2007-09-11 6:04 ` [41/41] Mmap support using pte PAGE_SIZE mappings Christoph Lameter
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