Date: Mon, 08 Jan 2024 23:01:30 +0000
From: bugzilla-noreply@freebsd.org
To: bugs@FreeBSD.org
Subject: [Bug 276209] Implement relative atime ("relatime") mount option
Message-ID: <bug-276209-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D276209 Bug ID: 276209 Summary: Implement relative atime ("relatime") mount option Product: Base System Version: CURRENT Hardware: Any OS: Any Status: New Severity: Affects Some People Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: delphij@FreeBSD.org Creating a bug so this is not forgotten. Linux kernel has a feature called "relative atime", which changes atime upd= ate behavior to only perform the update when: - Current atime is older than either of mtime or ctime, or - Current atime is older than a day. This behavior is made default on Linux since 2.6.30. The following needs to be done: 1. Create a new mount flag, MNT_RELATIME (sys/sys/mount.h) and adjust sys/kern/vfs_mount.c so that: - When none of [no]atime, relatime are present, MNT_RELATIME is set; - Otherwise, [no]atime resets MNT_RELATIME and set MNT_NOATIME accordingl= y; - "norelatime" alone means "atime". 2. statfs(2) and mount(8) are updated to reflect MNT_RELATIME flag, add sup= port for the new flag. 3. Extend existing file systems to support this feature. The following filesystems supports MNT_NOATIME and should be extended: ZFS, ext2fs, fuse, msdosfs, ufs. 4. Linux compatibility layer: compat/linprocfs/linprocfs.c, compat/linux/linux_stats.c should be extended to support the new flag. --=20 You are receiving this mail because: You are the assignee for the bug.=
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