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Thu, 15 Jul 2021 21:42:04 -0700 (PDT) Received: from asus ([37.151.208.206]) by smtp.gmail.com with ESMTPSA id y24sm550949lfe.255.2021.07.15.21.42.02 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 15 Jul 2021 21:42:03 -0700 (PDT) Date: Fri, 16 Jul 2021 10:42:01 +0600 From: Zhansaya Bagdauletkyzy To: Pavel Tatashin Cc: Andrew Morton , Tyler Hicks , linux-mm , LKML Subject: Re: [PATCH 2/2] mm: KSM: fix data type Message-ID: <20210716044201.GA210515@asus> References: <3610f5373bb12ea04e025bafbf8350f75c0dbf4b.1626371112.git.zhansayabagdaulet@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Authentication-Results: imf05.hostedemail.com; dkim=pass header.d=gmail.com header.s=20161025 header.b=PFuTJezU; spf=pass (imf05.hostedemail.com: domain of zhansayabagdaulet@gmail.com designates 209.85.208.177 as permitted sender) smtp.mailfrom=zhansayabagdaulet@gmail.com; dmarc=pass (policy=none) header.from=gmail.com X-Rspamd-Server: rspam05 X-Stat-Signature: ff64u5ejdby5uxrxw1aziwdcy7tk7jsp X-Rspamd-Queue-Id: 13C675012D69 X-HE-Tag: 1626410525-61214 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 Thu, Jul 15, 2021 at 02:10:33PM -0400, Pavel Tatashin wrote: > On Thu, Jul 15, 2021 at 2:01 PM Zhansaya Bagdauletkyzy > wrote: > > > > ksm_stable_node_chains_prune_millisecs is declared as int, but in > > stable__node_chains_prune_millisecs_store(), it can store values up to > > UINT_MAX. Change the variable type to unsigned int. > > > > Signed-off-by: Zhansaya Bagdauletkyzy > > --- > > mm/ksm.c | 8 ++++---- > > 1 file changed, 4 insertions(+), 4 deletions(-) > > > > diff --git a/mm/ksm.c b/mm/ksm.c > > index 057d0c245bf4..2e4bd7662e52 100644 > > --- a/mm/ksm.c > > +++ b/mm/ksm.c > > @@ -259,7 +259,7 @@ static unsigned long ksm_stable_node_chains; > > static unsigned long ksm_stable_node_dups; > > > > /* Delay in pruning stale stable_node_dups in the stable_node_chains */ > > -static int ksm_stable_node_chains_prune_millisecs = 2000; > > +static unsigned int ksm_stable_node_chains_prune_millisecs = 2000; > > > > /* Maximum number of page slots sharing a stable node */ > > static int ksm_max_page_sharing = 256; > > @@ -3105,11 +3105,11 @@ stable_node_chains_prune_millisecs_store(struct kobject *kobj, > > struct kobj_attribute *attr, > > const char *buf, size_t count) > > { > > - unsigned long msecs; > > + unsigned int msecs; > > int err; > > > > - err = kstrtoul(buf, 10, &msecs); > > - if (err || msecs > UINT_MAX) > > + err = kstrtouint(buf, 10, &msecs); > > + if (err) > > return -EINVAL; > > > > ksm_stable_node_chains_prune_millisecs = msecs; > > LGTM, but I would merge the two patches together. They both update > types of sysfs tunnables in the same file. Ok, I'll send v2 as a single patch. Thanks, Zhansaya