From mboxrd@z Thu Jan 1 00:00:00 1970 From: Yessine Daoud Subject: Re: Slow HVM boot time, was "HVM boot time optimization" Date: Mon, 12 Feb 2018 09:27:25 +0100 Message-ID: References:

<20180208164810.7h7equv4gfbjyzet@citrix.com> <20180208165600.GC1740@perard.uk.xensource.com> <20180208173233.6dejumgyqsz3ecjv@citrix.com> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============6038426677262432107==" Return-path: Received: from us1-rack-dfw2.inumbo.com ([104.130.134.6]) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1el9SR-0001Zk-OC for xen-devel@lists.xenproject.org; Mon, 12 Feb 2018 08:27:27 +0000 Received: by mail-io0-x236.google.com with SMTP id p188so16402284ioe.12 for ; Mon, 12 Feb 2018 00:27:26 -0800 (PST) In-Reply-To: <20180208173233.6dejumgyqsz3ecjv@citrix.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" To: Stefano Stabellini Cc: Anthony PERARD , xen-devel@lists.xenproject.org, ian.jackson@eu.citrix.com, Wei Liu List-Id: xen-devel@lists.xenproject.org --===============6038426677262432107== Content-Type: multipart/alternative; boundary="001a113962d8dc57e80564ffa515" --001a113962d8dc57e80564ffa515 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hello, Thank you for your quick response. Any hints how can I "fix" this "issue"? *Any workaround? =E1=90=A7 2018-02-08 18:32 GMT+01:00 Wei Liu : > On Thu, Feb 08, 2018 at 04:56:00PM +0000, Anthony PERARD wrote: > > On Thu, Feb 08, 2018 at 04:48:10PM +0000, Wei Liu wrote: > > > On Thu, Feb 08, 2018 at 08:31:40AM -0800, Stefano Stabellini wrote: > > > > CC'ing xen-devel and a few relevant people > > > > > > > > On Thu, 8 Feb 2018, Yessine Daoud wrote: > > > > > Dear Sir, > > > > > I need your help please. > > > > > > > > > > I am using a direct kernel boot (HVM guest) with kernel + ramdisk= . > > > > > At boot, seabios is bloqued about 20 seconds (or more) at the > following state: > > > > > > > > > > > The manual seems a bit confusing to me but maybe I misremember how it > > > works. My understanding is direct kernel boot jumps straight to kerne= l > > > entry point without going through firmware. > > > > > > If this is direct kernel boot why is seabios involved? > > > > seabios is the one to load the kernel into memory and start it. > > > > I see. Thank for explaining. > > Wei. > --001a113962d8dc57e80564ffa515 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable

Hello,

Thank you for your qu= ick response.

Any hints how ca= n I "fix" this "issue"? *Any workaround?

=E1=90=A7

2018-02-08 18:32 GMT+01:00 Wei Liu <wei.liu2@ci= trix.com>:

On Thu, Feb 08, 2018 at 04:56:00PM +0000, Anthony PERARD wrote:
> On Thu, Feb 08, 2018 at 04:48:10PM +0000, Wei Liu wrote:
> > On Thu, Feb 08, 2018 at 08:31:40AM -0800, Stefano Stabellini wrot= e:
> > > CC'ing xen-devel and a few relevant people
> > >
> > > On Thu, 8 Feb 2018, Yessine Daoud wrote:
> > > > Dear Sir,
> > > > I need your help please.
> > > >
> > > > I am using a direct kernel boot (HVM guest) with kernel= + ramdisk.
> > > > At boot, seabios is bloqued about 20 seconds (or more) = at the following state:
> > > >
> >
> > The manual seems a bit confusing to me but maybe I misremember ho= w it
> > works. My understanding is direct kernel boot jumps straight to k= ernel
> > entry point without going through firmware.
> >
> > If this is direct kernel boot why is seabios involved?
>
> seabios is the one to load the kernel into memory and start it.
>

I see. Thank for explaining.

Wei.

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