On Tue, 28 Aug 2001, Dieter N|tzel wrote:
> * readahead do not show dramatic differences
> * killall -STOP kupdated DO
>
> Yes, I know it is dangerous to stop kupdated but my disk show heavy thrashing
> (seeks like mad) since 2.4.7ac4. killall -STOP kupdated make it smooth and
> fast, again.
Interesting.
A while back, I twiddled the flush logic in buffer.c a little and made
kupdated only handle light flushing.. stay out of the way when bdflush
is running. This and some dynamic adjustment of bdflush flushsize and
not stopping flushing right _at_ (biggie) the trigger level produced
very interesting improvements. (very marked reduction in system time
for heavy IO jobs, and large improvement in file rewrite throughput)
-Mike
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This archive was generated by hypermail 2b29 : Fri Aug 31 2001 - 21:00:27 EST