Date: Fri, 03 Jul 2026 15:24:20 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 296466] copy_file_range can be very slow on zfs even for small files Message-ID: <bug-296466-227-vYRWAQvQrK@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-296466-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=296466 --- Comment #6 from martin@lispworks.com --- (In reply to Oleksandr Kryvulia from comment #2) It is fast if I set atime=off. It is also fast if I set compression=off and recreate the test file (so it's not compressed). The output of procstat -kk looks like this when it is slow: PID TID COMM TDNAME KSTACK 9951 101982 install - mi_switch+0xbd _cv_wait+0xfb txg_wait_synced_impl+0xb9 txg_wait_synced+0xb dmu_offset_next+0x80 zfs_holey+0x11a zfs_freebsd_ioctl+0x4b vn_generic_copy_file_range+0x67d vn_copy_file_range+0x25d kern_copy_file_range+0x3be sys_copy_file_range+0x78 amd64_syscall+0x117 fast_syscall_common+0xf8 -- You are receiving this mail because: You are the assignee for the bug.home | help
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