Linux: Rewriting the Buffer Layer
Jun 27, 2007, 12:00 (2 Talkback[s])
"Posting a series of three patches, Nick Piggin announced that
he was working on a rewrite of the buffer layer which he calls
fsblock, 'the name is fsblock because it basically ties the fs
layer to the block layer.' As to just what the buffer layer is,
Nick explained, 'the buffer layer is a layer between the pagecache
and the block device for block based filesystems. It keeps a
translation between logical offset and physical block number, as
well as meta information such as locks, dirtyness, and IO status of
each block. This information is tracked via the buffer_head
structure.' Before listing the improvements introduced by his
rewrite, Nicked offered a justification for the effort..."
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