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b=nNUPQW36SjxwGAiVy261aK8fE4BPdYUKGnAI85RSyL2fVSAtEx0a/k4ktnuHzw7jA OjwCy+7SCxSmQO9328Z4fLb7pCpxFyepOjjAWzjOC8AWLMiqTuLXAdVE4lvwB/FXMH 9NiTIvcDv1tEZ22r1y3yAGRVHEpIVcZ/qgbBwjupIVFdIXIPsMsKQnf1JaeSWvGeJw 3h/D3WfzwycWj3i8wR+VBlxcNNlgmKu36oWUG1nCUqnCWgb3QeTK+GwT2fZvHgoB1k gEfxPzDUnUpQL9H2MiaWG17zJWYARrdUR4aejrPcyqrug8JUmtIs4mNbEmlm6ywtSt 1uCWIB9jN3BJw== From: Christian Brauner To: Mateusz Guzik Cc: Christian Brauner , viro@zeniv.linux.org.uk, jack@suse.cz, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, hughd@google.com, linux-ext4@vger.kernel.org, tytso@mit.edu, linux-mm@kvack.org Subject: Re: [PATCH v3 0/3] symlink length caching Date: Thu, 21 Nov 2024 13:34:44 +0100 Message-ID: <20241121-blatt-akkubetrieben-ad5d655d184a@brauner> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20241120112037.822078-1-mjguzik@gmail.com> References: <20241120112037.822078-1-mjguzik@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" X-Developer-Signature: v=1; a=openpgp-sha256; l=1297; i=brauner@kernel.org; h=from:subject:message-id; bh=9peFlhC4ruSN6CtZ3OzEwhHu359NZdsnNpRUcSrcQaA=; b=owGbwMvMwCU28Zj0gdSKO4sYT6slMaTbazyNrz58+ZvrCj+1hw9YA59dUyxZprLRZFWIYpX1G 6vixtBrHaUsDGJcDLJiiiwO7Sbhcst5KjYbZWrAzGFlAhnCwMUpABOZq8nIsKpHzNbqzauft73s 9VdNdbBtuuOseniC73el2fsS5S937WVkuP1Mt/2I18WH5zxblXVenT3HXnDA+HF7SbHc/h2Xu1c mMQAA X-Developer-Key: i=brauner@kernel.org; a=openpgp; fpr=4880B8C9BD0E5106FC070F4F7B3C391EFEA93624 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: 89FD11A0018 X-Stat-Signature: pygqxgu8i8jry4kwa5giajsqrwnckju1 X-HE-Tag: 1732192428-779525 X-HE-Meta: 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 A46CM0R3 1W3fo1mOKvoMOsmeg0c4cqT80Oj52EU6C4QHhjUtjFDHssSbifx3vWMHODRtgxpN5Myg5FZr3rv4oSe35X3oubpF9HD1Fi2GhjYM0TM6oINJYXyWfYd1WJwV7GsIR5wtNlN0C1ADBK3gwLM9ctUQ1P3rVd9gZmX+Z2bL2ps+uvWGjjEprANgAlxiWt7deBIc9xcM8VXhVwejlRy0glZyW3afM4lyB4RxWCzfjUex2oYOBupl5F1IbNeDT/nbImBF23eebAwr/2qbpMxWN3Tmx9GOU4Wvd+X8wzBN3 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: List-Subscribe: List-Unsubscribe: On Wed, 20 Nov 2024 12:20:33 +0100, Mateusz Guzik wrote: > quote: > When utilized it dodges strlen() in vfs_readlink(), giving about 1.5% > speed up when issuing readlink on /initrd.img on ext4. > > The size is stored in a union with i_devices, which is never looked at > unless the inode is for a device. > > [...] Applied to the vfs-6.14.misc branch of the vfs/vfs.git tree. Patches in the vfs-6.14.misc branch should appear in linux-next soon. Please report any outstanding bugs that were missed during review in a new review to the original patch series allowing us to drop it. It's encouraged to provide Acked-bys and Reviewed-bys even though the patch has now been applied. If possible patch trailers will be updated. Note that commit hashes shown below are subject to change due to rebase, trailer updates or similar. If in doubt, please check the listed branch. tree: https://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs.git branch: vfs-6.14.misc [1/3] vfs: support caching symlink lengths in inodes https://git.kernel.org/vfs/vfs/c/5cbb3c7e0051 [2/3] ext4: use inode_set_cached_link() https://git.kernel.org/vfs/vfs/c/740456f67017 [3/3] tmpfs: use inode_set_cached_link() https://git.kernel.org/vfs/vfs/c/30071e02c163