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dkim=pass header.d=oppo.com header.s=selector1 header.b="ZP6z/wkn"; dmarc=pass (policy=quarantine) header.from=oppo.com; spf=pass (imf04.hostedemail.com: domain of liuhailong@oppo.com designates 40.107.132.85 as permitted sender) smtp.mailfrom=liuhailong@oppo.com X-Stat-Signature: wrc16r3ukxs1n5ri4aeqikzfyppadtx5 X-Rspamd-Queue-Id: 4A1C350056DF X-Rspamd-Server: rspam05 X-HE-Tag: 1629002714-36317 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 8/14/2021 4:13 AM, Andrew Morton wrote: > On Fri, 13 Aug 2021 18:47:25 +0800 liuhailong wro= te: > >> print NR_KERNEL_MISC_RECLAIMABLE stat from show_free_areas >> to check whether shrinker work correctly and current mem usage. > > What inspired this change? Are you observing problems with > misc_reclaimable memory accumulation? 1. although we can get usage from /proc/meminfo, but sometimes we only ge= t kernel msg, so we need this to check memusage 2. some drivers use it, like dma heap page pool or gpu driver mem pool, s= o it also help us to find whether shrinker work correctly on lowmem condi= tion 3. i thought it's resonable for show_free_areas to print misc_recliamiabl= e