diff options
| author | Stuart Hayes <stuart.w.hayes@gmail.com> | 2024-08-22 22:28:04 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-09-03 13:06:43 +0200 |
| commit | 8064952c65045f05ee2671fe437770e50c151776 (patch) | |
| tree | 2f708cc3ff74bd8dda289d9939ca649cc0b925e9 /drivers/base/base.h | |
| parent | driver core: separate function to shutdown one device (diff) | |
| download | linux-8064952c65045f05ee2671fe437770e50c151776.tar.xz linux-8064952c65045f05ee2671fe437770e50c151776.zip | |
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 'drivers/base/base.h')
| -rw-r--r-- | drivers/base/base.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/base/base.h b/drivers/base/base.h index 8cf04a557bdb..ea18aa70f151 100644 --- a/drivers/base/base.h +++ b/drivers/base/base.h @@ -10,6 +10,7 @@ * shared outside of the drivers/base/ directory. * */ +#include <linux/async.h> #include <linux/notifier.h> /** @@ -97,6 +98,8 @@ struct driver_private { * the device; typically because it depends on another driver getting * probed first. * @async_driver - pointer to device driver awaiting probe via async_probe + * @shutdown_after - used during device shutdown to ensure correct shutdown + * ordering. * @device - pointer back to the struct device that this structure is * associated with. * @dead - This device is currently either in the process of or has been @@ -114,6 +117,7 @@ struct device_private { struct list_head deferred_probe; const struct device_driver *async_driver; char *deferred_probe_reason; + async_cookie_t shutdown_after; struct device *device; u8 dead:1; }; |