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Date: Fri, 10 Nov 2000 11:47:21 +0100 (CET)
From: Mike Galbraith <mikeg@wen-online.de>
To: Linus Torvalds <torvalds@transmeta.com>
cc: Jens Axboe <axboe@suse.de>, MOLNAR Ingo <mingo@chiara.elte.hu>,
        Rik van Riel <H.H.vanRiel@phys.uu.nl>,
        Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Alan Cox <alan@lxorguk.ukuu.org.uk>
Subject: Re: [BUG] /proc/<pid>/stat access stalls badly for swapping process,
 2.4.0-test10
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> I understood the above well enough to be very interested in seeing what
> happens with flush IO restricted.
> 
> 	-Mike
> 
> [try_to_free_pages()->swap_out()/shm_swap().. can fight over who gets
> to shrink the best candidate's footprint?]
> 
> Thanks!

The results:

pre2+semaphore
real    14m19.987s
user    6m24.480s
sys     1m12.970s

pre2+semaphore+throttle_IO
real    10m13.953s
user    6m19.980s
sys     0m28.960s

pre2+semaphore+throttle_IO extended to refill_inactive()
real    9m46.395s
user    6m23.510s
sys     0m29.420s

pre2+semaphore+throttle_IO + above + tiny little tweak to page_launder()
real    8m56.808s
user    6m23.420s
sys     0m29.430s

Unfortunately, when I try to get past this point I burn trees :-)

	-Mike

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