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Differential D28682

zfs: Avoid updating the L2ARC device header unnecessarily
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Authored by mm on Feb 15 2021, 8:15 AM.
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freqlabs
mmacy
mjg
delphij
Commits
rG0be7053c91b9: zfs: Avoid updating the L2ARC device header unnecessarily
rGedb9049c3a78: zfs: Avoid updating the L2ARC device header unnecessarily
rG5dce03847fdc: zfs: Avoid updating the L2ARC device header unnecessarily
Summary

From openzfs 0ae184a6baaf71e155e9b19af81b75474622ff58 commit message:

If we do not write any buffers to the cache device and the evict hand
has not advanced do not update the cache device header.

Cherry-picked from openzfs master 0ae184a6b

MFC after: 3 days

This prevents zfs from continously writing to l2arc on an idle system.
Fix relevant for 13.0-RELEASE

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rG FreeBSD src repository
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Revision Contents
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sys/
contrib/
openzfs/
module/
zfs/
4 lines

Diff 83919

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sys/contrib/openzfs/module/zfs/arc.c

PropertyOld ValueNew Value
fbsd:nokeywordsnullyes
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svn:eol-stylenullnative
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svn:mime-typenulltext/plain
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include/sbi/fw_dynamic.h
include/sbi/riscv_asm.h
include/sbi/riscv_atomic.h
include/sbi/riscv_barrier.h
include/sbi/riscv_encoding.h
include/sbi/riscv_fp.h
include/sbi/riscv_io.h
include/sbi/riscv_locks.h
include/sbi/riscv_unpriv.h
include/sbi/sbi_bitops.h
include/sbi/sbi_bits.h
include/sbi/sbi_console.h
include/sbi/sbi_const.h
include/sbi/sbi_ecall.h
include/sbi/sbi_ecall_interface.h
include/sbi/sbi_emulate_csr.h
include/sbi/sbi_error.h
include/sbi/sbi_fifo.h
include/sbi/sbi_hart.h
include/sbi/sbi_illegal_insn.h
include/sbi/sbi_init.h
include/sbi/sbi_ipi.h
include/sbi/sbi_misaligned_ldst.h
include/sbi/sbi_platform.h
include/sbi/sbi_scratch.h
include/sbi/sbi_string.h
include/sbi/sbi_system.h
include/sbi/sbi_timer.h
include/sbi/sbi_tlb.h
include/sbi/sbi_trap.h
include/sbi/sbi_types.h
include/sbi/sbi_version.h
include/sbi_utils/irqchip/plic.h
include/sbi_utils/serial/sifive-uart.h
include/sbi_utils/serial/uart8250.h
include/sbi_utils/sys/clint.h
lib/libsbi.a
lib/libsbiutils.a
%%QEMU_VIRT%%%%DATADIR%%/platform/qemu/virt/firmware/fw_dynamic.bin
%%QEMU_VIRT%%%%DATADIR%%/platform/qemu/virt/firmware/fw_dynamic.elf
%%QEMU_VIRT%%%%DATADIR%%/platform/qemu/virt/firmware/fw_jump.bin
%%QEMU_VIRT%%%%DATADIR%%/platform/qemu/virt/firmware/fw_jump.elf
%%QEMU_VIRT%%%%DATADIR%%/platform/qemu/virt/firmware/fw_payload.bin
%%QEMU_VIRT%%%%DATADIR%%/platform/qemu/virt/firmware/fw_payload.elf
%%QEMU_VIRT%%%%DATADIR%%/platform/qemu/virt/firmware/payloads/test.bin
%%QEMU_VIRT%%%%DATADIR%%/platform/qemu/virt/firmware/payloads/test.elf
%%QEMU_VIRT%%%%DATADIR%%/platform/qemu/virt/lib/libplatsbi.a
%%SIFIVE_FU540%%%%DATADIR%%/platform/sifive/fu540/firmware/fw_dynamic.bin
%%SIFIVE_FU540%%%%DATADIR%%/platform/sifive/fu540/firmware/fw_dynamic.elf
%%SIFIVE_FU540%%%%DATADIR%%/platform/sifive/fu540/firmware/fw_jump.bin
%%SIFIVE_FU540%%%%DATADIR%%/platform/sifive/fu540/firmware/fw_jump.elf
%%SIFIVE_FU540%%%%DATADIR%%/platform/sifive/fu540/firmware/fw_payload.bin
%%SIFIVE_FU540%%%%DATADIR%%/platform/sifive/fu540/firmware/fw_payload.elf
%%SIFIVE_FU540%%%%DATADIR%%/platform/sifive/fu540/firmware/payloads/test.bin
%%SIFIVE_FU540%%%%DATADIR%%/platform/sifive/fu540/firmware/payloads/test.elf
%%SIFIVE_FU540%%%%DATADIR%%/platform/sifive/fu540/lib/libplatsbi.a