Messages in this thread | | | Subject | Re: Subtle MM bug | From | Zlatko Calusic <> | Date | 09 Jan 2001 13:29:00 +0100 |
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Linus Torvalds <torvalds@transmeta.com> writes:
> On 8 Jan 2001, Eric W. Biederman wrote: > > > Zlatko Calusic <zlatko@iskon.hr> writes:> > > > > > > Yes, but a lot more data on the swap also means degraded performance, > > > because the disk head has to seek around in the much bigger area. Are > > > you sure this is all OK? > > > > I don't think we have more data on the swap, just more data has an > > allocated home on the swap. > > I think Zlatko's point is that because of the extra allocations, we will > have worse locality (more seeks etc).
Yes that was my concern.
But in the end I'm not sure. I made two simple tests and haven't found any problems with 2.4.0 mm logic (opposed to 2.2.17). In fact, the new kernel was faster in the more interesting (make -j32) test.
Also I have found that new kernel allocates 4 times more swap space under some circumstances. That may or may not be alarming, it remains to be seen.
-- Zlatko - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/
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