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Received: from willy by casper.infradead.org with local (Exim 4.97.1 #2 (Red Hat Linux)) id 1roxQh-00000000My9-2nno; Tue, 26 Mar 2024 03:24:52 +0000 Date: Tue, 26 Mar 2024 03:24:51 +0000 From: Matthew Wilcox To: Barry Song <21cnbao@gmail.com> Cc: akpm@linux-foundation.org, linux-mm@kvack.org, ryan.roberts@arm.com, david@redhat.com, kasong@tencent.com, yuzhao@google.com, yosryahmed@google.com, cerasuolodomenico@gmail.com, surenb@google.com, Barry Song Subject: Re: [RFC PATCH] mm: show mthp_fault_alloc and mthp_fault_fallback of multi-size THPs Message-ID: References: <20240326030103.50678-1-21cnbao@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20240326030103.50678-1-21cnbao@gmail.com> X-Rspamd-Server: rspam09 X-Rspamd-Queue-Id: 6C89C140005 X-Stat-Signature: 36gnkb8j6ye91gscb9txe8to8radyuyg X-Rspam-User: X-HE-Tag: 1711423505-407441 X-HE-Meta: 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 A7BswY2U 173lTnnlF2A07E3qKcDcInNIr7rsHuvWZs+V+H5lsf6MnnVnQCzJrv7ySgfWtF3CtnPKO+GZ2WCpKbE4u6wKlh8SXjn9XVM96PuDYH9AV7NrfVORruM7wWbdwCh6ea7qkwlOTMIEwkM+mKS4bGzqOEVYnKi4TYkEBtsIenVqa+Ziz7VVmF6QI+AJ5JQ== X-Bogosity: Ham, tests=bogofilter, spamicity=0.007946, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Tue, Mar 26, 2024 at 04:01:03PM +1300, Barry Song wrote: > Profiling a system blindly with mTHP has become challenging due > to the lack of visibility into its operations. While displaying > additional statistics such as partial map/unmap actions may > spark debate, presenting the success rate of mTHP allocations > appears to be a straightforward and pressing need. Ummm ... no? Not like this anyway. It has the bad assumption that "mTHP" only comes in one size.