OK, this definitely makes a big difference for my test cases which
include that 'tar' above as well as a run of dvd::rip. Without this
patch everything else on my system drops to a total crawl, especially
which dvd::rip is running, dvd::rip itself won't even switch tabs. With
this patch everything seems quite normal and snappy.
I'll try a few more test cases but backing this out certainly seems to
restore the system to the same behavior as 2.5.64. BTW, I'm running
this on 2.5.65-mm4. I would have tested on 2.5.66-mm1 but for some
reason my system locks solid after only a few minutes with it. I
haven't tried to track that down yet.
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