Re: [PATCH] arch: uapi: asm: mman.h: Support MADV_FREE for madvise()

From: Chen Gang
Date: Mon Dec 01 2014 - 20:49:55 EST

On 12/2/14 06:01, Carlos O'Donell wrote:
> On Mon, Dec 1, 2014 at 4:35 PM, Geert Uytterhoeven <geert@xxxxxxxxxxxxxx> wrote:
>> On Mon, Dec 1, 2014 at 9:52 PM, Max Filippov <jcmvbkbc@xxxxxxxxx> wrote:
>>> On Mon, Dec 1, 2014 at 11:43 PM, Chen Gang <gang.chen.5i5j@xxxxxxxxx> wrote:
>>>> At present, kernel supports madvise(MADV_FREE), so can benefit to all
>>>> related architectures (can grep MADV_WILLNEED or MADV_REMOVE in "arch/"
>>>> to know about all related architectures).
>>> A similar patch has been posted a while ago:

OK, thanks.

>> Would it be possible to use the same number everywhere?

For current patch, I guess, we can use '8' for it, since MADV_FREE in
asm-generic is merged just a few days ago (which is not used by user
mode), and parisc has to use '8'.

And welcome the related member's ideas.

> Yes please. It's ridiculous that we still need patches like this.
> I proposed unifying all this two years ago, but didn't follow up.
> From glibc's perspective it would be simpler if we started using the
> same number everywhere.

For me, we can divide it into 2 steps:

- Let MADV_FREE has the same value (about current patch).

- Let all shared MADV_* to "asm-generic" (about next patch, although I
am not quite sure whether it is executable).

Chen Gang

Open, share, and attitude like air, water, and life which God blessed
To unsubscribe from this list: send the line "unsubscribe linux-alpha" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at