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From: "gregkh@linuxfoundation.org" <gregkh@linuxfoundation.org>
To: "Zhang, Ning A" <ning.a.zhang@intel.com>
Cc: Andy Lutomirski <luto@kernel.org>,
	"tglx@linutronix.de" <tglx@linutronix.de>,
	"stable@vger.kernel.org" <stable@vger.kernel.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: backport Rewrite sync_core() to use IRET-to-self to stable kernels?
Date: Thu, 25 Jan 2018 07:50:57 +0100	[thread overview]
Message-ID: <20180125065057.GC24052@kroah.com> (raw)
In-Reply-To: <027FCDD209E4CC4181A7B9D5DBB880575FDDBC11@SHSMSX104.ccr.corp.intel.com>


A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?
A: Top-posting.
Q: What is the most annoying thing in e-mail?

A: No.
Q: Should I include quotations after my reply?

http://daringfireball.net/2007/07/on_top

On Thu, Jan 25, 2018 at 02:22:57AM +0000, Zhang, Ning A wrote:
> When Linux runs as a guest OS, CPUID is privileged instruction, sync_core() will be very slow.
> 
> If apply this patch, 200ms will be saved for kernel initial, when Linux runs as a guest OS.

That's not a regression.  Why not just use a newer kernel release if you
want to get the feature of "faster boot"?  :)

thanks,

greg k-h

  reply	other threads:[~2018-01-25  6:50 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-01-23  2:59 backport Rewrite sync_core() to use IRET-to-self to stable kernels? Zhang, Ning A
2018-01-23  3:06 ` Andy Lutomirski
2018-01-23  7:25   ` gregkh
2018-01-24  8:19     ` Zhang, Ning A
2018-01-24  9:01       ` gregkh
2018-01-25  2:22         ` Zhang, Ning A
2018-01-25  6:50           ` gregkh [this message]
2018-01-24  9:00     ` gregkh

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