Re: [PATCH] Recent VM fiasco - fixed

From: Paul Barton-Davis (pbd@Op.Net)
Date: Mon May 08 2000 - 20:32:44 EST

Rik writes:

>> I would be happy to see 2.4 out ASAP. Later, when it stabilizes,
>> we will have lots of fun in 2.5, that's for sure.
>Of course, this has the highest priority.

I hope so. The only usable 2.3 kernel for me (doing professional hard
disk audio recording with Linux) has been 2.3.51. I switched to the
2.3.99 series because ALSA switched to matched new isapnp interfaces
amongst other things, so 2.3.51 was no longer an option.

But its worse: because i got tired of 2.3.99pre-anything's
performance, I switched to 2.2.15. This kernel seems almost as bad as
2.3.99pre6 when it comes to disk i/o performance. Stuff that used to
work fine on 2.2.10 just dies with horrendous performance problems on
2.2.15. I am not sure if its kswapd or not - I just gave up with a
distinct sense of frustration that such a basic function - lots and
lots of disk i/o - was now broken in 2.2.15 as well!

I will be applying Andrea's classzone24 patch tonight to a pre7 kernel,
but I am, frankly, worried that the work done on the VM system
between 2.3.51 and 2.3.99 might have been a complete mistake that
no-one seems able or willing to back out of. I see what Rik has said
about his & Linus' attempts, and it sounds good, but I am bothered
that neither of the two current "stable" and "development" kernels can
do what 2.2.10 or 2.3.51 could do. This seems pretty grave.


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