From: Ingo Molnar <mingo@elte.hu>
To: Gabriel C <nix.or.die@googlemail.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
linux-kernel@vger.kernel.org,
Andrew Morton <akpm@linux-foundation.org>,
"H. Peter Anvin" <hpa@zytor.com>,
Thomas Gleixner <tglx@linutronix.de>,
"Pallipadi, Venkatesh" <venkatesh.pallipadi@intel.com>,
Arjan van de Ven <arjan@infradead.org>,
"Siddha, Suresh B" <suresh.b.siddha@intel.com>,
Avi Kivity <avi@qumranet.com>
Subject: Re: [git pull] x86 PAT changes
Date: Sat, 26 Apr 2008 17:41:23 +0200 [thread overview]
Message-ID: <20080426154123.GA7295@elte.hu> (raw)
In-Reply-To: <48134C45.806@googlemail.com>
* Gabriel C <nix.or.die@googlemail.com> wrote:
> Ingo Molnar wrote:
> > * Gabriel C <nix.or.die@googlemail.com> wrote:
> >
> >> Hi Ingo,
> >>
> >> When using an 64bit ( didn't got time to test 32bit now ) kernel[1]
> >> with PAT enabled , kvm-intel does not work anymore.
> >>
> >> When modprobing kvm-intel , kvm is saying VT extension is disable by
> >> BIOS which isn't true. When disabling PAT again ( no changes to BIOS )
> >> kvm-intel works again here.
> >>
> >> Is that an known problem ?
> >
> > no, that side-effect was not known. Cc:-ed more folks.
>
> It seems like the update triggers some compiler bug.
>
> Setting CC_OPTIMIZE_FOR_SIZE=n fixed that btw.
>
> I don't have the time right now but later on today I will compile
> gcc43_svn_branch and test again with CC_OPTIMIZE_FOR_SIZE=y and see
> what I get.
>
> Ingo sorry for the noise.
no problem and it's not noise even if it turns out to be a compiler
problem - we very much want to know about them when they affect the
kernel.
Ingo
next prev parent reply other threads:[~2008-04-26 15:41 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-04-24 22:56 [git pull] x86 PAT changes Ingo Molnar
2008-04-25 23:43 ` Linus Torvalds
2008-04-26 0:06 ` H. Peter Anvin
2008-04-26 1:12 ` Linus Torvalds
2008-04-26 8:56 ` Ingo Molnar
2008-04-26 16:54 ` Pallipadi, Venkatesh
2008-04-26 17:15 ` Linus Torvalds
2008-04-26 18:32 ` Venki Pallipadi
2008-04-26 19:07 ` [patch] x86, PAT: disable /dev/mem mmap RAM with PAT Ingo Molnar
2008-04-26 9:57 ` [git pull] x86 PAT changes Ingo Molnar
2008-04-26 13:40 ` Gabriel C
2008-04-26 14:42 ` Ingo Molnar
2008-04-26 15:37 ` Gabriel C
2008-04-26 15:41 ` Ingo Molnar [this message]
2008-04-26 16:43 ` Linus Torvalds
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20080426154123.GA7295@elte.hu \
--to=mingo@elte.hu \
--cc=akpm@linux-foundation.org \
--cc=arjan@infradead.org \
--cc=avi@qumranet.com \
--cc=hpa@zytor.com \
--cc=linux-kernel@vger.kernel.org \
--cc=nix.or.die@googlemail.com \
--cc=suresh.b.siddha@intel.com \
--cc=tglx@linutronix.de \
--cc=torvalds@linux-foundation.org \
--cc=venkatesh.pallipadi@intel.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.