linux-kernel - Re: [PATCH -v4] x86: only load initrd above 4g on second try

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Date:	Fri, 5 Sep 2014 07:47:49 +0200
From:	Anders Darander <anders@...rgestorm.se>
To:	Yinghai Lu <yinghai@...nel.org>
CC:	Matt Fleming <matt@...sole-pimps.org>,
	Mantas Mikulėnas <grawity@...il.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	Matt Fleming <matt.fleming@...el.com>,
	Ingo Molnar <mingo@...hat.com>,
	"linux-efi@...r.kernel.org" <linux-efi@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Laszlo Ersek <lersek@...hat.com>
Subject: Re: [PATCH -v4] x86: only load initrd above 4g on second try

* Yinghai Lu <yinghai@...nel.org> [140905 03:19]:


> On Thu, Sep 4, 2014 at 2:29 PM, Matt Fleming <matt@...sole-pimps.org> wrote:
> > On Thu, 04 Sep, at 01:59:05PM, H. Peter Anvin wrote:

> >> I am fine with this patch, but at the same time I do want to note that
> >> there is an alternative to double-buffer the patch and/or (if that
> >> applies to the buggy BIOS) round up the size of the target buffer.

> > I'm not sure that rounding up the size of the target buffer will
> > workaround this issue correctly.

> > As far as I know, the only thing that Mantas tried was rounding up the
> > size of the source file, by padding it.

> Can you try attached patch on top of linus tree?

I took the liberty to test the patch on my Dell XPS13 9333, and
unfortunately I got the old hang back. 

This was tested on the current Linus' tree.

Cheers,
Anders Darander

> -					chunksize = size;
> +					chunksize = round_up(size, EFI_PAGE_SIZE);



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