Messages in this thread | | | Date | Sun, 17 Oct 1999 00:39:35 +0200 (CEST) | From | Andrea Arcangeli <> | Subject | Re: Speeding up swap |
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On Sat, 16 Oct 1999, Kristian Koehntopp wrote:
>data rate of 6 MB/sec under NT and 3 MB/sec under Linux. During >paging operations heavy seeking is audible.
In 2.2.x the algorithm that allocates swap pages didn't care about fragmentation and dirty pages had no persistence on the swap space. In 2.3.x instead I made the algorithm to take care of fragmentation like ext2 does for the block-inodes and I also given persistence to dirty anonymous pages on the swap space. With 2.3.x you shouldn't hear heavy seeking. Actually to get good performances on 2.3.x you should also apply these two patches:
ftp://ftp.*.kernel.org/pub/linux/kernel/people/andrea/patches/v2.3/2.3.22/swap-cache-low-prio.gz ftp://ftp.*.kernel.org/pub/linux/kernel/people/andrea/patches/v2.3/2.3.18ac4/trashing-mem-1.gz
Andrea
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