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AJvYcCX2nxA9jHOqLX/Ugk4zvsbs/qgnXPkUlLY7O5auukdrrtC+UOEcGpycWuS0c4+VBpHFcL1Hb84Qbfo=@vger.kernel.org X-Gm-Message-State: AOJu0Yzst/dSC9i9ECcYINV73J7lwSEwoubZRRdEf752rw1YOksxRXd2 tEvxAKUsPFxr3+tw8ciaGeMhtlC6+wn3rcG7wUXm2iOKC0wENYAWOAckIm1NVLrVNxMEpuqh4nd rYgpxFIlYMKnaiqIlSuM+fUe/b8TPuf9EFZ0d+hwdTA== X-Gm-Gg: ASbGncsCNiGPSIJraF029NmEuw1WmN37OVaSbpPxtUDpYUF7Kq5fbJh0E5hzHnghBTT MwMjNf+hynT53ryWk+jKZwHrxBjanMCcJkFYVULmxc8CqCwoLf92PC+YSYlj8lzU+S8RQp+u4XF SWzF+oG1LjZLCLkWeWtEWwj8cwaN6cOZF2ZWLWnwigdPAUpvxvf1YgJyYX37JsXuhmAqESLRW49 7Bs X-Google-Smtp-Source: AGHT+IEZg9+tOdoBN5pipaSz8l0JIXA4kWu5teWmH4MdPQcTJ4hEm9+p/VjHT1EFMtU++w0i7sf5NEh4l/b4T/vp+IU= X-Received: by 2002:a05:622a:299b:b0:4aa:d487:594b with SMTP id d75a77b69052e-4ae6df3479fmr44745741cf.35.1753279719903; Wed, 23 Jul 2025 07:08:39 -0700 (PDT) Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 References: <20250625231838.1897085-1-pasha.tatashin@soleen.com> <20250625231838.1897085-26-pasha.tatashin@soleen.com> In-Reply-To: From: Pasha Tatashin Date: Wed, 23 Jul 2025 14:08:02 +0000 X-Gm-Features: Ac12FXwWi_rhmMIkdkRxwkl_fKGePVCICDRFX_LJg-BXvjlQMX0IOJ0Ennnr9xw Message-ID: Subject: Re: [PATCH v1 25/32] mm: shmem: use SHMEM_F_* flags instead of VM_* flags To: Pratyush Yadav Cc: jasonmiu@google.com, graf@amazon.com, changyuanl@google.com, rppt@kernel.org, dmatlack@google.com, rientjes@google.com, corbet@lwn.net, rdunlap@infradead.org, ilpo.jarvinen@linux.intel.com, kanie@linux.alibaba.com, ojeda@kernel.org, aliceryhl@google.com, masahiroy@kernel.org, akpm@linux-foundation.org, tj@kernel.org, yoann.congal@smile.fr, mmaurer@google.com, roman.gushchin@linux.dev, chenridong@huawei.com, axboe@kernel.dk, mark.rutland@arm.com, jannh@google.com, vincent.guittot@linaro.org, hannes@cmpxchg.org, dan.j.williams@intel.com, david@redhat.com, joel.granados@kernel.org, rostedt@goodmis.org, anna.schumaker@oracle.com, song@kernel.org, zhangguopeng@kylinos.cn, linux@weissschuh.net, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linux-mm@kvack.org, gregkh@linuxfoundation.org, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, rafael@kernel.org, dakr@kernel.org, bartosz.golaszewski@linaro.org, cw00.choi@samsung.com, myungjoo.ham@samsung.com, yesanishhere@gmail.com, Jonathan.Cameron@huawei.com, quic_zijuhu@quicinc.com, aleksander.lobakin@intel.com, ira.weiny@intel.com, andriy.shevchenko@linux.intel.com, leon@kernel.org, lukas@wunner.de, bhelgaas@google.com, wagi@kernel.org, djeffery@redhat.com, stuart.w.hayes@gmail.com, lennart@poettering.net, brauner@kernel.org, linux-api@vger.kernel.org, linux-fsdevel@vger.kernel.org Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Thu, Jun 26, 2025 at 1:01=E2=80=AFPM Pratyush Yadav wrote: > > Hi all, > > On Wed, Jun 25 2025, Pasha Tatashin wrote: > > > From: Pratyush Yadav > > > > shmem_inode_info::flags can have the VM flags VM_NORESERVE and > > VM_LOCKED. These are used to suppress pre-accounting or to lock the > > pages in the inode respectively. Using the VM flags directly makes it > > difficult to add shmem-specific flags that are unrelated to VM behavior > > since one would need to find a VM flag not used by shmem and re-purpose > > it. > > > > Introduce SHMEM_F_NORESERVE and SHMEM_F_LOCKED which represent the same > > information, but their bits are independent of the VM flags. Callers ca= n > > still pass VM_NORESERVE to shmem_get_inode(), but it gets transformed t= o > > the shmem-specific flag internally. > > > > No functional changes intended. > > I was reading through this patch again and just realized that I missed a > spot. __shmem_file_setup() passes VM flags to shmem_{un,}acct_size(), > even though it now expects SHMEM_F flag. Below fixup patch should fix > that. Added for v2. Pasha