linux-kernel - RE: [PATCH v1] mm: swap: Call count_mthp_stat() outside ifdef CONFIG_TRANSPARENT

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <SJ0PR11MB5678738DBE2B5B3B1F6CC760C9702@SJ0PR11MB5678.namprd11.prod.outlook.com>
Date: Wed, 2 Oct 2024 19:30:57 +0000
From: "Sridhar, Kanchana P" <kanchana.p.sridhar@...el.com>
To: Yosry Ahmed <yosryahmed@...gle.com>
CC: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>, "hannes@...xchg.org"
	<hannes@...xchg.org>, "nphamcs@...il.com" <nphamcs@...il.com>,
	"chengming.zhou@...ux.dev" <chengming.zhou@...ux.dev>, "ryan.roberts@....com"
	<ryan.roberts@....com>, "Huang, Ying" <ying.huang@...el.com>,
	"21cnbao@...il.com" <21cnbao@...il.com>, "akpm@...ux-foundation.org"
	<akpm@...ux-foundation.org>, "Feghali, Wajdi K" <wajdi.k.feghali@...el.com>,
	"Gopal, Vinodh" <vinodh.gopal@...el.com>, "Sridhar, Kanchana P"
	<kanchana.p.sridhar@...el.com>
Subject: RE: [PATCH v1] mm: swap: Call count_mthp_stat() outside ifdef
 CONFIG_TRANSPARENT_HUGEPAGE.

> -----Original Message-----
> From: Yosry Ahmed <yosryahmed@...gle.com>
> Sent: Wednesday, October 2, 2024 12:02 PM
> To: Sridhar, Kanchana P <kanchana.p.sridhar@...el.com>
> Cc: linux-kernel@...r.kernel.org; linux-mm@...ck.org;
> hannes@...xchg.org; nphamcs@...il.com; chengming.zhou@...ux.dev;
> ryan.roberts@....com; Huang, Ying <ying.huang@...el.com>;
> 21cnbao@...il.com; akpm@...ux-foundation.org; Feghali, Wajdi K
> <wajdi.k.feghali@...el.com>; Gopal, Vinodh <vinodh.gopal@...el.com>
> Subject: Re: [PATCH v1] mm: swap: Call count_mthp_stat() outside ifdef
> CONFIG_TRANSPARENT_HUGEPAGE.
> 
> On Wed, Oct 2, 2024 at 10:30 AM Kanchana P Sridhar
> <kanchana.p.sridhar@...el.com> wrote:
> >
> > This patch moves the call to count_mthp_stat() in
> count_swpout_vm_event()
> > to be outside the "ifdef CONFIG_TRANSPARENT_HUGEPAGE" based on
> changes
> > made in commit 246d3aa3e53151fa150f10257ddd8a4facd31a6a ("mm:
> cleanup
> >  count_mthp_stat() definition").
> >
> > Signed-off-by: Kanchana P Sridhar <kanchana.p.sridhar@...el.com>
> 
> 
> I don't think this really makes a difference, but I will leave it to
> the THP folks to decide.

Sure, this makes sense.

> 
> However, if you go through with this, please also do the same for the
> call in shrink_folio_list() for consistency.

Yes, will submit v2 with the same modification in shrink_folio_list().

Thanks,
Kanchana

> 
> >
> > ---
> >  mm/page_io.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/mm/page_io.c b/mm/page_io.c
> > index 4aa34862676f..a28d28b6b3ce 100644
> > --- a/mm/page_io.c
> > +++ b/mm/page_io.c
> > @@ -289,8 +289,8 @@ static inline void count_swpout_vm_event(struct
> folio *folio)
> >                 count_memcg_folio_events(folio, THP_SWPOUT, 1);
> >                 count_vm_event(THP_SWPOUT);
> >         }
> > -       count_mthp_stat(folio_order(folio), MTHP_STAT_SWPOUT);
> >  #endif
> > +       count_mthp_stat(folio_order(folio), MTHP_STAT_SWPOUT);
> >         count_memcg_folio_events(folio, PSWPOUT, folio_nr_pages(folio));
> >         count_vm_events(PSWPOUT, folio_nr_pages(folio));
> >  }
> > --
> > 2.27.0
> >