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bh=c0DueKZiAOAwvmHTn8r0NCMCSCOYfX1U98L77P7a8W8=; b=bkuWqqaUkAfWbW3tOs/Ek6Uh6tJ1oj084R1p3W3glyAE3iAOFm15v1su bG3x4Uh03d3BcfULydI/d9xVy3m0E/TQovcpk/QeZBLxm2Wuz8Z/VcKd5 6TfwM1J9XE1m9B/U+biHkQiY1+e1mteiJS+LugkIN/axnE5aOPirh4+9c /XiyLdFA6DBGSH9dKbGsHPZfiyMh3GL44uN8jcHNLUeRke948nEK+HZz0 lAd2qZUxKjegVU6kQ3ywm3dWnZZx2QZXk8D6MZwCTRHS9pQYdlQG/kH64 SUrgt5qOHgUCTDwWxdzNS56TEpEhPIW1RwxTfjyK0G6VBpeZrQjOEl50T Q==; X-IronPort-AV: E=McAfee;i="6600,9927,10985"; a="5127824" X-IronPort-AV: E=Sophos;i="6.06,162,1705392000"; d="scan'208";a="5127824" Received: from orviesa008.jf.intel.com ([10.64.159.148]) by fmvoesa107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 15 Feb 2024 15:19:35 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.06,162,1705392000"; d="scan'208";a="4077327" Received: from jmjohns4-mobl1.amr.corp.intel.com (HELO [10.209.57.138]) ([10.209.57.138]) by orviesa008-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 15 Feb 2024 15:19:33 -0800 Message-ID: <38e34171-e116-46ee-8e2b-de7cc96d265e@intel.com> Date: Thu, 15 Feb 2024 15:19:33 -0800 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 31/35] lib: add memory allocations report in show_mem() Content-Language: en-US To: Steven Rostedt , Kent Overstreet Cc: Vlastimil Babka , Suren Baghdasaryan , Michal Hocko , akpm@linux-foundation.org, hannes@cmpxchg.org, roman.gushchin@linux.dev, mgorman@suse.de, dave@stgolabs.net, willy@infradead.org, liam.howlett@oracle.com, corbet@lwn.net, void@manifault.com, peterz@infradead.org, juri.lelli@redhat.com, catalin.marinas@arm.com, will@kernel.org, arnd@arndb.de, tglx@linutronix.de, mingo@redhat.com, dave.hansen@linux.intel.com, x86@kernel.org, peterx@redhat.com, david@redhat.com, axboe@kernel.dk, mcgrof@kernel.org, masahiroy@kernel.org, nathan@kernel.org, dennis@kernel.org, tj@kernel.org, muchun.song@linux.dev, rppt@kernel.org, paulmck@kernel.org, pasha.tatashin@soleen.com, yosryahmed@google.com, yuzhao@google.com, dhowells@redhat.com, hughd@google.com, andreyknvl@gmail.com, keescook@chromium.org, ndesaulniers@google.com, vvvvvv@google.com, gregkh@linuxfoundation.org, ebiggers@google.com, ytcoode@gmail.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, bsegall@google.com, bristot@redhat.com, vschneid@redhat.com, cl@linux.com, penberg@kernel.org, iamjoonsoo.kim@lge.com, 42.hyeyoo@gmail.com, glider@google.com, elver@google.com, dvyukov@google.com, shakeelb@google.com, songmuchun@bytedance.com, jbaron@akamai.com, rientjes@google.com, minchan@google.com, kaleshsingh@google.com, kernel-team@android.com, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, iommu@lists.linux.dev, linux-arch@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-modules@vger.kernel.org, kasan-dev@googlegroups.com, cgroups@vger.kernel.org References: <20240212213922.783301-1-surenb@google.com> <20240212213922.783301-32-surenb@google.com> <320cd134-b767-4f29-869b-d219793ba8a1@suse.cz> <20240215180742.34470209@gandalf.local.home> From: Dave Hansen Autocrypt: addr=dave.hansen@intel.com; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 2/15/24 15:07, Steven Rostedt wrote: > Just adding the patches increases the size by 5k. But the rest shows an > increase of 259k, and you are worried about 4k (and possibly less?)??? Doesn't the new page_ext thingy add a pointer per 'struct page', or ~0.2% of RAM, or ~32MB on a 16GB laptop? I, too, am confused why 4k is even remotely an issue.