Al,
I'll get on these right away. I have seen an increase in VM: killing
"name" if I run too many tests at once. 2.3.99 is shutting down user
mode apps on test scenarios that 2.2.15 handles quite easily with an
identical hardware configuration.
I will post the results later this afternoon or evening.
Jeff
Alexander Viro wrote:
>
> On Tue, 18 Apr 2000, Jeff V. Merkey wrote:
>
> >
> > Also, minor correction. It was dput() that was oinking in 2.4 and not
> > d_lookup(). This is probably worse since dput() may trigger inode
> > updates in underlying file systems. It took a lot longer to copy the
> > files under 2.3.99 than 2.2.15.
>
> Oh, but that changes the picture completely. There is a lot of things that
> could change the dput() frequency - it's called in dcache trimming and any
> increase of memory pressure would lead to more dput() calls. And amount of
> time spent in dput() depends on the contents of dcache, so...
>
> Something bad happened with VM balance lately. I suspect that it's a
> different issue and what you see in dput() is consequence of VM problems.
> If that's what changed between -pre3 and -pre5 - we'ld better start
> looking at the code on memory-pressure pathes changed in that period.
> However, there was a bunch of changes in lookup mechanism during that
> time. I don't think that VM problems are related to that, but...
>
> Could you try to profile 2.3.51, 2.3.99-pre3 and 2.3.99-pre5 and compare
> the results? That would probably help to distinguish between the sources
> of that shit...
>
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