Messages in this thread | | | Subject | [PATCH 0/4] map multiple blocks in get_block() and mpage_readpages() | From | Badari Pulavarty <> | Date | Mon, 27 Feb 2006 13:20:39 -0800 |
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Hi,
Following patches add support to map multiple blocks in ->get_block(). This is will allow us to handle mapping of multiple disk blocks for mpage_readpages() and mpage_writepages() etc. Instead of adding new argument, I use "b_size" to indicate the amount of disk mapping needed for get_block(). And also, on success get_block() actually indicates the amount of disk mapping it did.
Now that get_block() can handle multiple blocks, there is no need for ->get_blocks() which was added for DIO.
[PATCH 1/4] change buffer_head.b_size to size_t
[PATCH 2/4] pass b_size to ->get_block()
[PATCH 3/4] map multiple blocks for mpage_readpages()
[PATCH 4/4] remove ->get_blocks() support
I noticed decent improvements (reduced sys time) on JFS, XFS and ext3. (on simple "dd" read tests).
(rc3.mm1) (rc3.mm1 + patches) real 0m18.814s 0m18.482s user 0m0.000s 0m0.004s sys 0m3.240s 0m2.912s
Andrew, Could you include it in -mm tree ?
Comments ?
Thanks, Badari
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