public inbox for kvm-ia64@vger.kernel.org
 help / color / mirror / Atom feed
From: Jes Sorensen <jes@sgi.com>
To: kvm-ia64@vger.kernel.org
Subject: Re: switching from KVM guest to the host .... TLBs not present?
Date: Tue, 14 Apr 2009 11:43:45 +0000	[thread overview]
Message-ID: <49E476F1.6020809@sgi.com> (raw)
In-Reply-To: <49DE0856.8010700@sgi.com>

Avi Kivity wrote:
> Applied, but I note that entering the guest with any lock held is 
> problematic, as the guest may spend an arbitrary amount of time in guest 
> mode.  Really, entering the guest is almost exactly like exiting to 
> userspace.

Thanks Avi,

I did wonder about this as I noticed x86_64 doesn't hold the lock while
entering a guest. I'll have a look - seems like it could be the reason
why I get hit by lockdep timeouts when running larger guests on ia64.

Cheers,
Jes



  parent reply	other threads:[~2009-04-14 11:43 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-04-09 14:38 switching from KVM guest to the host .... TLBs not present? Jes Sorensen
2009-04-10 12:47 ` Zhang, Xiantao
2009-04-11 16:04 ` Avi Kivity
2009-04-14 11:43 ` Jes Sorensen [this message]
2009-04-16  8:43 ` Jes Sorensen
2009-04-16  8:59 ` Avi Kivity
2009-04-16  9:41 ` Zhang, Xiantao
2009-04-16  9:55 ` Avi Kivity
2009-04-16  9:57 ` Zhang, Xiantao

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=49E476F1.6020809@sgi.com \
    --to=jes@sgi.com \
    --cc=kvm-ia64@vger.kernel.org \
    /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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox