Re: [PATCH v1 2/3] /proc/kpageflags: return KPF_SLAB for slab tail pages

[Vladimir Davydov]

On Thu, Feb 04, 2016 at 04:08:02PM +0900, Naoya Horiguchi wrote:
> Currently /proc/kpageflags returns just KPF_COMPOUND_TAIL for slab tail pages,
> which is inconvenient when grasping how slab pages are distributed (userspace
> always needs to check which kind of tail pages by itself). This patch sets
> KPF_SLAB for such pages.
> 
> With this patch:
> 
>   $ grep Slab /proc/meminfo ; tools/vm/page-types -b slab
>   Slab:              64880 kB
>                flags      page-count       MB  symbolic-flags                     long-symbolic-flags
>   0x0000000000000080           16220       63  _______S__________________________________ slab
>                total           16220       63
> 
> 16220 pages equals to 64880 kB, so returned result is consistent with the
> global counter.
> 
> Signed-off-by: Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx>

Reviewed-by: Vladimir Davydov <vdavydov@xxxxxxxxxxxxx>