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c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc:content-transfer-encoding; bh=lEGfJXljVJQVDFGapn/ihQVDl58e1Lo7WB4ovbMgJhY=; b=Xanhg9crPbB+5COueKcGKcEBOEOdEpiVsNLCVAUNUrxbHC1c6CsAgeWpzdKWGFJ1Ez cYLqjlcHtNvPEq5vMOxaroq/6YTIXKWjvfDWDN72xFHuYZkxg6dm0Xm4Hql9hgmBV96J iqiQFJY1ua7FUUT2AlOQErEOgV+e9kjjs+2SZuPgYfClsETzGZnPqLz/dP2URo1gyVla I7wJSfRZthkDVRGQxUtqcrC9GIN1lCBh3LIKKnN23JvWvNlcx8o3rfAVuizj+o8YsInG BrfPf6jgbQThbEQGx2ZL9zP6TTbB7oXWskbBbnmVv0Y/oc+EqbVG1sYI7v7pjHDOVnA9 T+Lg== X-Gm-Message-State: AOAM531H7kN64GjCQ5VipadEAxsM3puwJfp9DadS4FalVwzqOBhcq0WS ekw7WS63qQTF9biq4my1/EnjnHoziLxKBI9pkak= X-Google-Smtp-Source: ABdhPJzb/hWU3/g5CvkMNDfdOVM5h2DtE0XxPTPg3z3CmqHPjeXluN9CzNtbBMmLlm6CDuybBz5q1d20bQsC+rOaltA= X-Received: by 2002:a2e:874c:: with SMTP id q12mr5431858ljj.424.1607714431449; Fri, 11 Dec 2020 11:20:31 -0800 (PST) MIME-Version: 1.0 References: <20201202182725.265020-1-shy828301@gmail.com> <20201202182725.265020-3-shy828301@gmail.com> <550518d6-fd50-72be-7c84-71153b470cfd@hisilicon.com> In-Reply-To: <550518d6-fd50-72be-7c84-71153b470cfd@hisilicon.com> From: Yang Shi Date: Fri, 11 Dec 2020 11:20:19 -0800 Message-ID: Subject: Re: [PATCH 2/9] mm: vmscan: use nid from shrink_control for tracepoint To: "Xiaqing (A)" Cc: Roman Gushchin , Kirill Tkhai , Shakeel Butt , Dave Chinner , Johannes Weiner , Michal Hocko , Andrew Morton , Linux MM , Linux FS-devel Mailing List , Linux Kernel Mailing List , Liu Yi Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Wed, Dec 2, 2020 at 7:13 PM Xiaqing (A) wr= ote: > > > > On 2020/12/3 2:27, Yang Shi wrote: > > The tracepoint's nid should show what node the shrink happens on, the s= tart tracepoint > > uses nid from shrinkctl, but the nid might be set to 0 before end trace= point if the > > shrinker is not NUMA aware, so the traceing log may show the shrink hap= pens on one > > node but end up on the other node. It seems confusing. And the follow= ing patch > > will remove using nid directly in do_shrink_slab(), this patch also hel= ps cleanup > > the code. > > > > Signed-off-by: Yang Shi > > --- > > mm/vmscan.c | 2 +- > > 1 file changed, 1 insertion(+), 1 deletion(-) > > > > diff --git a/mm/vmscan.c b/mm/vmscan.c > > index 7d6186a07daf..457ce04eebf2 100644 > > --- a/mm/vmscan.c > > +++ b/mm/vmscan.c > > @@ -533,7 +533,7 @@ static unsigned long do_shrink_slab(struct shrink_c= ontrol *shrinkctl, > > new_nr =3D atomic_long_add_return(next_deferred, > > &shrinker->nr_deferred[nid]); > > > > - trace_mm_shrink_slab_end(shrinker, nid, freed, nr, new_nr, total_= scan); > > + trace_mm_shrink_slab_end(shrinker, shrinkctl->nid, freed, nr, new= _nr, total_scan); > > Hi=EF=BC=8C Yang > > When I read this patch, I wondered why you modified it so much until I re= ad patch6. Could you merge > this patch into patch6? Sorry for the late reply. It could be, but I was inclined to think this is a bug and we might need backport it to stable, so I leave it as a standalone patch. > > Thanks! > > > return freed; > > } > > >