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Re: Making spl7 just cli/sti?
From: |
Samuel Thibault |
Subject: |
Re: Making spl7 just cli/sti? |
Date: |
Sun, 8 Mar 2015 11:57:56 +0100 |
User-agent: |
Mutt/1.5.21+34 (58baf7c9f32f) (2010-12-30) |
Hello,
Justus Winter, le Sat 07 Mar 2015 10:51:18 +0100, a écrit :
> Quoting Samuel Thibault (2014-12-14 02:44:08)
> > The attached patch fixes this by making spl.S use just cli/sti for spl7;
> > they can be emulated fine without any VMEXIT. This lowers the number of
> > PIC mask changes to a few hundreds or thousands only, and getting the
> > gnumach on kvm on kvm case way faster.
>
> Unfortunately this change breaks gnumach on xen:
Was this a kernel built with --enable-kdb?
Something which was incorrect for the Xen case was the IF checkup, which
I've now disabled.
Samuel