Messages in this thread | | | From | Marc-Christian Petersen <> | Subject | Re: 2.4.20: Proccess stuck in __lock_page ... | Date | Tue, 27 May 2003 20:08:43 +0200 |
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On Tuesday 27 May 2003 19:57, Marcelo Tosatti wrote:
Hi Marcelo,
> > I do, people I know do also, numbers of those people only _I_ know are > > about ~30. I've reported this problem over a year ago while 2.4.19-pre > > time. > Can you please try to reproduce it with -aa? not again ;)
I've tried almost all known kernel tree's around, every kernel has the same effect. I even tried SuSE and Redhat Kernels.
I've 'wasted' tons of time just find a solution for it.
Andrea introduced, to address _exact_ this problem (pauses, stops, mouse is dead etc.), his lowlatency elevator. Side effect: decreases i/o throughput, and the "pauses/stops" are still there. Much less but not gone.
The _only_ workaround yet (known to the public) is to change nr_requests in drivers/block/ll_rw_blk.c from 128 to 4 which gives a performance hit of about 40% (not acceptable in any way).
.oO( I am quite sure I've mailed you all this stuff privately in response to your private mail to me ;) )Oo.
ciao, Marc
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