Re: [PATCH 1/3] memblock, nobootmem: Add memblock_virt_alloc_low()

[Kevin Hilman]

On Tue, Jan 28, 2014 at 12:02 AM, Olof Johansson <olof@xxxxxxxxx> wrote:
> Hi,
>
> On Fri, Jan 24, 2014 at 11:11 AM, Yinghai Lu <yinghai@xxxxxxxxxx> wrote:
>> The new memblock_virt APIs are used to replaced old bootmem API.
>>
>> We need to allocate page below 4G for swiotlb.
>>
>> That should fix regression on Andrew's system that is using swiotlb.
>>
>> Signed-off-by: Yinghai Lu <yinghai@xxxxxxxxxx>
>> Cc: Russell King <linux@xxxxxxxxxxxxxxxx>
>> Cc: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
>
> This seems to have been merged by Linus tonight as ad6492b80f, and it
> had fallout on ARM systems (boot failures with no console output on
> all but 5 of my machine/config combos).
>
> Seems like it didn't have a chance to sit in -next, which is somewhat
> understandable given that it's considered a bugfix and it indeed fixed
> the bug it was meant to.
>
> i'm out of time to debug this tonight (I noticed the failures as I was
> heading to bed and figured I'd at least bisect them), so I wouldn't
> mind seeing a revert of the ARM side change of ad6492b80f until it's
> been sorted out so we keep bisectabilty intact for the rest of the
> kernel.

Like Olof, I noticed multiple boot failures on various ARM boards.
I've confirmed that reverting the arch/arm part of this patch makes
them all happily booting again.

Kevin
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