Re: arm_memblock_steal() API usage

[Taniya Das <tdas@xxxxxxxxxxxxxx>]

RMK,

On 03-Apr-12 1:00 PM, Russell King - ARM Linux wrote:
> On Tue, Apr 03, 2012 at 09:34:03AM +0530, Taniya Das wrote:
> > I have a requirement where I need around ~100 bytes of memory to save
> > contents of
> > registers to a non-cached area before going into low power mode.
> >
> > I did do some analysis on a 1GB RAM device of allocating 8 bytes using
> > the API and the below was the result
> > was showing allocating only 8 bytes.
> >
> > API used : -  arm_memblock_steal(SZ_8, SZ_64K);-->  physical address
> > returned is 0x3b1f0000
> It's silly to use this for the above purpose.  Why not just use kmalloc
> and cache flushing to ensure that the data is pushed out to RAM?
We don't want to do a kmalloc and flush, we want to do something similar 
to how OMAP4
does, keeping aside a chunk of RAM for saving the contents. But my only 
concern what will
be the minimum amount of memory allocated by arm_memblock_steal?
> > Also is this API advisable for devices with low system RAM?
> No.


--
Thanks&  Regards,
Taniya Das.

Sent by an employee of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.

--
To unsubscribe from this list: send the line "unsubscribe linux-arm-msm" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html