Re: [PATCH v3 0/3] idle memory tracking
From: Vladimir Davydov
Date: Wed Apr 29 2015 - 03:59:14 EST
Thank you for taking a look at this patch set.
On Wed, Apr 29, 2015 at 12:57:22PM +0900, Minchan Kim wrote:
> On Tue, Apr 28, 2015 at 03:24:39PM +0300, Vladimir Davydov wrote:
> > * /proc/kpageidle. For each page this file contains a 64-bit number, which
> > equals 1 if the page is idle or 0 otherwise, indexed by PFN. A page is
> Why do we need 64bit per page to indicate just idle or not?
I don't think we need this, actually. I made this file 64 bit per page
only to conform to other /proc/kpage* files. Currently, I can't think of
any potential use for residual 63 bits, so personally I'm fine with 1
bit per page. If nobody comes with an idea about how > 1 bits could be
used, I'll switch /proc/kpageidle to a bitmask in the next iteration.
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/