diff options
| author | Stuart Hayes <stuart.w.hayes@gmail.com> | 2024-08-22 15:28:04 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-09-03 13:06:43 +0200 |
| commit | 8064952c65045f05ee2671fe437770e50c151776 (patch) | |
| tree | 2f708cc3ff74bd8dda289d9939ca649cc0b925e9 /include/linux/device | |
| parent | 95dc7565253a8564911190ebd1e4ffceb4de208a (diff) | |
driver core: shut down devices asynchronously
Add code to allow asynchronous shutdown of devices, ensuring that each
device is shut down before its parents & suppliers.
Only devices with drivers that have async_shutdown_enable enabled will be
shut down asynchronously.
This can dramatically reduce system shutdown/reboot time on systems that
have multiple devices that take many seconds to shut down (like certain
NVMe drives). On one system tested, the shutdown time went from 11 minutes
without this patch to 55 seconds with the patch.
Signed-off-by: Stuart Hayes <stuart.w.hayes@gmail.com>
Signed-off-by: David Jeffery <djeffery@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Tested-by: Keith Busch <kbusch@kernel.org>
Link: https://lore.kernel.org/r/20240822202805.6379-4-stuart.w.hayes@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/device')
| -rw-r--r-- | include/linux/device/driver.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/device/driver.h b/include/linux/device/driver.h index 5c04b8e3833b..14c9211b82d6 100644 --- a/include/linux/device/driver.h +++ b/include/linux/device/driver.h @@ -56,6 +56,7 @@ enum probe_type { * @mod_name: Used for built-in modules. * @suppress_bind_attrs: Disables bind/unbind via sysfs. * @probe_type: Type of the probe (synchronous or asynchronous) to use. + * @async_shutdown_enable: Enables devices to be shutdown asynchronously. * @of_match_table: The open firmware table. * @acpi_match_table: The ACPI match table. * @probe: Called to query the existence of a specific device, @@ -102,6 +103,7 @@ struct device_driver { bool suppress_bind_attrs; /* disables bind/unbind via sysfs */ enum probe_type probe_type; + bool async_shutdown_enable; const struct of_device_id *of_match_table; const struct acpi_device_id *acpi_match_table; |