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Mon, 18 Nov 2024 18:45:21 -0800 (PST) Received: from google.com ([2401:fa00:8f:203:8826:78b8:a8fe:1066]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-7f8c1c64f26sm6531771a12.48.2024.11.18.18.45.16 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 18 Nov 2024 18:45:20 -0800 (PST) Date: Tue, 19 Nov 2024 11:45:13 +0900 From: Sergey Senozhatsky To: Barry Song <21cnbao@gmail.com> Cc: Sergey Senozhatsky , Usama Arif , "Huang, Ying" , linux-mm@kvack.org, akpm@linux-foundation.org, axboe@kernel.dk, bala.seshasayee@linux.intel.com, chrisl@kernel.org, david@redhat.com, hannes@cmpxchg.org, kanchana.p.sridhar@intel.com, kasong@tencent.com, linux-block@vger.kernel.org, minchan@kernel.org, nphamcs@gmail.com, surenb@google.com, terrelln@fb.com, v-songbaohua@oppo.com, wajdi.k.feghali@intel.com, willy@infradead.org, yosryahmed@google.com, yuzhao@google.com, zhengtangquan@oppo.com, zhouchengming@bytedance.com, ryan.roberts@arm.com Subject: Re: [PATCH RFC v2 0/2] mTHP-friendly compression in zsmalloc and zram based on multi-pages Message-ID: <20241119024513.GB2668855@google.com> References: <20241107101005.69121-1-21cnbao@gmail.com> <87iksy5mkh.fsf@yhuang6-desk2.ccr.corp.intel.com> <28446805-f533-44fe-988a-71dcbdb379ab@gmail.com> <20241118095636.GA2668855@google.com> Precedence: bulk X-Mailing-List: linux-block@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: On (24/11/19 09:27), Barry Song wrote: > On Mon, Nov 18, 2024 at 10:56 PM Sergey Senozhatsky > wrote: > > > > On (24/11/12 09:31), Barry Song wrote: > > [..] > Yes, some filesystems also support mTHP. A simple grep > command can list them all: > > fs % git grep mapping_set_large_folios > afs/inode.c: mapping_set_large_folios(inode->i_mapping); > afs/inode.c: mapping_set_large_folios(inode->i_mapping); > bcachefs/fs.c: mapping_set_large_folios(inode->v.i_mapping); > erofs/inode.c: mapping_set_large_folios(inode->i_mapping); > nfs/inode.c: mapping_set_large_folios(inode->i_mapping); > smb/client/inode.c: mapping_set_large_folios(inode->i_mapping); > zonefs/super.c: mapping_set_large_folios(inode->i_mapping); Yeah, those are mostly not on-disk file systems, or not filesystems that people use en-mass for r/w I/O workloads (e.g. vfat, ext4, etc.)