Re: kern/53124 (FFS is slow because pmap_update doesn't scale)

[jdolecek%NetBSD.org@localhost]

Synopsis: FFS is slow because pmap_update doesn't scale

Responsible-Changed-From-To: kern-bug-people->jdolecek
Responsible-Changed-By: jdolecek%NetBSD.org@localhost
Responsible-Changed-When: Mon, 02 Apr 2018 19:16:15 +0000
Responsible-Changed-Why:
I'm looking on this.


State-Changed-From-To: analyzed->feedback
State-Changed-By: jdolecek%NetBSD.org@localhost
State-Changed-When: Mon, 02 Apr 2018 19:16:15 +0000
State-Changed-Why:
Can you try this patch with the default UBC_WINSHIFT, if it makes
any difference?
http://www.netbsd.org/~jdolecek/uvm_bio_emap.diff

I'm leaning towards just using direct map for this, but would like
to try this one first. I was able to boot system with this patch
so it seems working to some limited extend, but of course might need
further improvements.