Hi, On Wed, Jul 08, 2009 at 04:40:08PM +0400, Vladislav Bolkhovitin wrote: > I've also long ago noticed that reading data from block devices is slower > than from files from mounted on those block devices file systems. Can > anybody explain it? Brainstorming: - block size (reads on the block dev might be done with smaller size) - readahead (do we use the same RA algo for block devs) - page cache might be better optimized than buffer cache? Just guesses from someone that has not looked into that area of the kernel for a while, so take it with a grain of salt. Cheers, -- Kurt Garloff, VP OPS Partner Engineering -- Novell Inc.
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