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Subject: RE: Re: Re: [PATCH 1/1] stackdepot: interface to check entries and
 size of stackdepot.
Reply-To: v.narang@samsung.com
From:   Vaneet Narang <v.narang@samsung.com>
To:     Michal Hocko <mhocko@kernel.org>
CC:     Dmitry Vyukov <dvyukov@google.com>,
        Maninder Singh <maninder1.s@samsung.com>,
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        AMIT SAHRAWAT <a.sahrawat@samsung.com>,
        PANKAJ MISHRA <pankaj.m@samsung.com>,
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        kasan-dev <kasan-dev@googlegroups.com>
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Date:   Fri, 24 Nov 2017 13:30:25 +0000
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Hi Michal,

>>=C2=A0We=C2=A0have=C2=A0been=C2=A0getting=C2=A0similar=C2=A0kind=C2=A0of=
=C2=A0such=C2=A0entries=C2=A0and=C2=A0eventually=0D=0A>>=C2=A0stackdepot=C2=
=A0reaches=C2=A0Max=C2=A0Cap.=C2=A0So=C2=A0we=C2=A0found=C2=A0this=C2=A0int=
erface=C2=A0useful=C2=A0in=C2=A0debugging=0D=0A>>=C2=A0stackdepot=C2=A0issu=
e=C2=A0so=C2=A0shared=C2=A0in=C2=A0community.=0D=0A=C2=A0=0D=0A>Then=C2=A0u=
se=C2=A0it=C2=A0for=C2=A0internal=C2=A0debugging=C2=A0and=C2=A0provide=C2=
=A0a=C2=A0code=C2=A0which=C2=A0would=C2=A0scale=0D=0A>better=C2=A0on=C2=A0s=
maller=C2=A0systems.=C2=A0We=C2=A0do=C2=A0not=C2=A0need=C2=A0this=C2=A0in=
=C2=A0the=C2=A0kernel=C2=A0IMHO.=C2=A0We=C2=A0do=0D=0A>not=C2=A0merge=C2=A0=
all=C2=A0the=C2=A0debugging=C2=A0patches=C2=A0we=C2=A0use=C2=A0for=C2=A0int=
ernal=C2=A0development.=0D=0A=60=C2=A0=0D=0ANot=20just=20debugging=20but=20=
this=20information=20can=20also=20be=20used=20to=20profile=20and=20tune=20s=
tack=20depot.=20=0D=0AGetting=20count=20of=20stack=20entries=20would=20help=
=20in=20deciding=20hash=20table=20size=20and=20=0D=0Apage=20order=20used=20=
by=20stackdepot.=20=0D=0A=0D=0AFor=20less=20entries,=20bigger=20hash=20tabl=
e=20and=20higher=20page=20order=20slabs=20might=20not=20be=20required=20as=
=20=0D=0Amaintained=20by=20stackdepot.=20As=20i=20already=20mentioned=20sma=
ller=20size=20hashtable=20can=20be=20choosen=20and=20=0D=0Asimilarly=20lowe=
r=20order=20=20pages=20can=20be=20used=20for=20slabs.=0D=0A=0D=0AIf=20you=
=20think=20its=20useful,=20we=20can=20share=20scalable=20patch=20to=20confi=
gure=20below=20two=20values=20based=20on=20=0D=0Anumber=20of=20stack=20entr=
ies=20dynamically.=0D=0A=0D=0A=23define=20STACK_ALLOC_ORDER=202=20=0D=0A=23=
define=20STACK_HASH_SIZE=20(1L=20<<=20STACK_HASH_ORDER)=0D=0A=0D=0A=0D=0ARe=
gards,=0D=0AVaneet=20Narang

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