On Wed, 25 Jul 2007 13:34:01 +0200, Ingo Molnar said: > Maybe the kernel could be extended with a method of opening files in a > 'drop from the dcache after use' way. (beagled and backup tools could > make use of that facility too.) (Or some other sort of > file-cache-invalidation syscall that already exist, which would _also_ > result in the immediate zapping of the dentry+inode from the dcache.)
The semantic that would benefit my work patterns the most would not be "immediate zapping" - I have 2G of RAM, so often there's no memory pressure, and often a 'find' will be followed by another similar 'find' that will hit a lot of the same dentries and inodes, so may as well save them if we can. Flagging it as "the first to be heaved over the side the instant there *is* pressure" would suit just fine. Or is that the semantic you actually meant?
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