Re: [PATCH 3/5] lib: lockless generic and arch independent page table (gpt) v2.

From: Rik van Riel
Date: Thu Nov 06 2014 - 17:57:08 EST


-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

On 11/06/2014 05:40 PM, Jerome Glisse wrote:
> On Thu, Nov 06, 2014 at 05:32:00PM -0500, Rik van Riel wrote:

> Never a fan of preprocessor magic, but I see why it's needed.
>
> Acked-by: Rik van Riel <riel@xxxxxxxxxx>
>
>> v1 is not using preprocessor but has a bigger gpt struct
>> footprint and also more complex calculation for page table
>> walking due to the fact that i just rely more on runtime
>> computation than on compile time shift define through
>> preprocessor magic.
>
>> Given i am not a fan either of preprocessor magic if it makes you
>> feel any better i can resort to use v1, both have seen same kind
>> of testing and both are functionaly equivalent (API they expose
>> is obviously slightly different).
>
>> I am not convince that what the computation i save using
>> preprocessor will show up in anyway as being bottleneck for hot
>> path.

I have no strong preference either way. This code is perfectly readable.

Andrew?

- --
All rights reversed
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1

iQEcBAEBAgAGBQJUW/yGAAoJEM553pKExN6DqcwIAJAh8mUCOuzyhqJl21qMGWu9
FwL8qEUCxxXxLuX2MFv/wbkb07+OLI8nStI5rPxk6qUdC53YV4Bc7CWfvwF4slRB
hpPVGhmNKj4e5jwP+d8/MMSd6QfGA/jaiiRw9IxasOxzYKJxtKW4wAsme+qiDy6Y
i59sGQndVUstP6Zf5ZnaKN7BkG57daQqwypktPpMf7CQxv2uN5nnErDDFzhvm8Qz
tCcKtpsdZgek7l6RPaovvRHi0kT3L67gq5oIFuS9iiHGqhmohpj2sTENafLeWUb1
zGdjy8EcxBL5H0L1/wxs3PWjyKez1q/wEZJ390+wmRaMBWl1WqbGsAZ1uZ98bd0=
=ZAbm
-----END PGP SIGNATURE-----
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/