Alan Cox e340fc602b Request a CPU private mapping from sf_buf_alloc(). If the swap-backed ... memory disk is larger than the number of available sf_bufs, this improves performance on SMPs by eliminating interprocessor TLB shootdowns. For example, with 6656 sf_bufs, the default on my test machine, and a 256MB swap-backed memory disk, I see the command "dd if=/dev/md0 of=/dev/null bs=64k" achieve ~489MB/sec with the default, shared mappings, and ~587MB/sec with CPU private mappings.		2005-02-13 21:51:50 +00:00
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md.c	Request a CPU private mapping from sf_buf_alloc(). If the swap-backed	2005-02-13 21:51:50 +00:00