Re: Fixing excessive shootdowns during FFS read (kern/53124) on x86 - emap, direct map

[Jason Thorpe <thorpej%me.com@localhost>]

> On May 11, 2018, at 8:28 AM, Jaromír Doleček <jaromir.dolecek%gmail.com@localhost> wrote:
> 
> I've modified the uvm_bio.c code to use direct map for amd64. Change
> seems to be stable, I've also run 'build.sh tools' to test out the
> system, build suceeded and I didn't observe any problems with
> stability. Test was on 6-core Intel CPU with HT on (i.e. "12" cores
> visible to OS), NVMe disk, cca 2GB file read done via:

Very cool.  Alpha and MIPS could take advantage of this as well.

-- thorpej