Re: 1352 NUL bytes at the end of a page? (was Re: Assertion `s &&s->tree' failed: The saga continues.)

[Andrew Morton]

Steven Cole <elenstev@xxxxxxxxxxx> wrote:
>
> The script only reported one
>  iteration finished, while I got it to do 36 iterations over several hours earlier
>  today (with a 2.6.3-4mdk vendor kernel), so I'm going to add some timing 
>  tests to the script to see if things are really slowing down with current kernels,
>  or if it's just my worried imaginings.

I did a bit of testing on a 256MB laptop with a fairly slow disk, ext3. 
Three iterations of the test took:

2.6.6:		1055.53s user 327.14s system 32% cpu 1:10:06.71 total

2.4.27-pre2:	1042.03s user 307.21s system 32% cpu 1:09:46.00 total

2.6.3:		1053.23s user 326.16s system 27% cpu 1:22:07.24 total


So there's nothing particularly wild there.  It's possible I guess that the
2.6 VM is very sucky but something else made up for it - possibly the
anticipatory scheduler but more likely the Orlov allocator.

You're using reiserfs, yes?

Are you sure the IDE disks are in DMA mode?
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