Perform an emergency filesystem sync when an EC panic is reported. An
emergency sync actually performs two syncs internally in case some
inodes or pages are temporarily locked.
hw_protection_shutdown is replaced for a few reasons. It is unnecessary
because the EC will force reset either way. hw_protection_shutdown does
not reliably sync filesystem before shutting down. emergency_sync is not
synchronous so hw_protection_shutdown may interrupt emergency_sync.
Signed-off-by: Rob Barnes <[email protected]>
---
drivers/platform/chrome/cros_ec_lpc.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/platform/chrome/cros_ec_lpc.c b/drivers/platform/chrome/cros_ec_lpc.c
index 500a61b093e47..9652fc073c2a4 100644
--- a/drivers/platform/chrome/cros_ec_lpc.c
+++ b/drivers/platform/chrome/cros_ec_lpc.c
@@ -327,8 +327,8 @@ static void cros_ec_lpc_acpi_notify(acpi_handle device, u32 value, void *data)
dev_emerg(ec_dev->dev, "CrOS EC Panic Reported. Shutdown is imminent!");
blocking_notifier_call_chain(&ec_dev->panic_notifier, 0, ec_dev);
kobject_uevent_env(&ec_dev->dev->kobj, KOBJ_CHANGE, (char **)env);
- /* Begin orderly shutdown. Force shutdown after 1 second. */
- hw_protection_shutdown("CrOS EC Panic", 1000);
+ /* Force sync the filesystem before EC resets */
+ emergency_sync();
/* Do not query for other events after a panic is reported */
return;
}
--
2.41.0.255.g8b1d071c50-goog
Hi Rob,
On Mon, Jul 17, 2023 at 4:29 PM Rob Barnes <[email protected]> wrote:
>
> Perform an emergency filesystem sync when an EC panic is reported. An
> emergency sync actually performs two syncs internally in case some
> inodes or pages are temporarily locked.
>
> hw_protection_shutdown is replaced for a few reasons. It is unnecessary
> because the EC will force reset either way. hw_protection_shutdown does
> not reliably sync filesystem before shutting down. emergency_sync is not
> synchronous so hw_protection_shutdown may interrupt emergency_sync.
>
> Signed-off-by: Rob Barnes <[email protected]>
Reviewed-by: Benson Leung <[email protected]>
> ---
>
> drivers/platform/chrome/cros_ec_lpc.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/platform/chrome/cros_ec_lpc.c b/drivers/platform/chrome/cros_ec_lpc.c
> index 500a61b093e47..9652fc073c2a4 100644
> --- a/drivers/platform/chrome/cros_ec_lpc.c
> +++ b/drivers/platform/chrome/cros_ec_lpc.c
> @@ -327,8 +327,8 @@ static void cros_ec_lpc_acpi_notify(acpi_handle device, u32 value, void *data)
> dev_emerg(ec_dev->dev, "CrOS EC Panic Reported. Shutdown is imminent!");
> blocking_notifier_call_chain(&ec_dev->panic_notifier, 0, ec_dev);
> kobject_uevent_env(&ec_dev->dev->kobj, KOBJ_CHANGE, (char **)env);
> - /* Begin orderly shutdown. Force shutdown after 1 second. */
> - hw_protection_shutdown("CrOS EC Panic", 1000);
> + /* Force sync the filesystem before EC resets */
> + emergency_sync();
> /* Do not query for other events after a panic is reported */
> return;
> }
> --
> 2.41.0.255.g8b1d071c50-goog
>
--
Benson Leung
Staff Software Engineer
Chrome OS Kernel
Google Inc.
[email protected]
Chromium OS Project
[email protected]
On Mon, Jul 17, 2023 at 4:29 PM Rob Barnes <[email protected]> wrote:
>
> Perform an emergency filesystem sync when an EC panic is reported. An
> emergency sync actually performs two syncs internally in case some
> inodes or pages are temporarily locked.
>
> hw_protection_shutdown is replaced for a few reasons. It is unnecessary
> because the EC will force reset either way. hw_protection_shutdown does
> not reliably sync filesystem before shutting down. emergency_sync is not
> synchronous so hw_protection_shutdown may interrupt emergency_sync.
>
> Signed-off-by: Rob Barnes <[email protected]>
Makes sense.
Reviewed-by: Guenter Roeck <[email protected]>
> ---
>
> drivers/platform/chrome/cros_ec_lpc.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/platform/chrome/cros_ec_lpc.c b/drivers/platform/chrome/cros_ec_lpc.c
> index 500a61b093e47..9652fc073c2a4 100644
> --- a/drivers/platform/chrome/cros_ec_lpc.c
> +++ b/drivers/platform/chrome/cros_ec_lpc.c
> @@ -327,8 +327,8 @@ static void cros_ec_lpc_acpi_notify(acpi_handle device, u32 value, void *data)
> dev_emerg(ec_dev->dev, "CrOS EC Panic Reported. Shutdown is imminent!");
> blocking_notifier_call_chain(&ec_dev->panic_notifier, 0, ec_dev);
> kobject_uevent_env(&ec_dev->dev->kobj, KOBJ_CHANGE, (char **)env);
> - /* Begin orderly shutdown. Force shutdown after 1 second. */
> - hw_protection_shutdown("CrOS EC Panic", 1000);
> + /* Force sync the filesystem before EC resets */
> + emergency_sync();
> /* Do not query for other events after a panic is reported */
> return;
> }
> --
> 2.41.0.255.g8b1d071c50-goog
>
Hello:
This patch was applied to chrome-platform/linux.git (for-kernelci)
by Tzung-Bi Shih <[email protected]>:
On Mon, 17 Jul 2023 23:29:32 +0000 you wrote:
> Perform an emergency filesystem sync when an EC panic is reported. An
> emergency sync actually performs two syncs internally in case some
> inodes or pages are temporarily locked.
>
> hw_protection_shutdown is replaced for a few reasons. It is unnecessary
> because the EC will force reset either way. hw_protection_shutdown does
> not reliably sync filesystem before shutting down. emergency_sync is not
> synchronous so hw_protection_shutdown may interrupt emergency_sync.
>
> [...]
Here is the summary with links:
- drivers/cros_ec: Emergency sync filesystem on EC panic
https://git.kernel.org/chrome-platform/c/a6edd5f5d9cc
You are awesome, thank you!
--
Deet-doot-dot, I am a bot.
https://korg.docs.kernel.org/patchwork/pwbot.html
Hello:
This patch was applied to chrome-platform/linux.git (for-next)
by Tzung-Bi Shih <[email protected]>:
On Mon, 17 Jul 2023 23:29:32 +0000 you wrote:
> Perform an emergency filesystem sync when an EC panic is reported. An
> emergency sync actually performs two syncs internally in case some
> inodes or pages are temporarily locked.
>
> hw_protection_shutdown is replaced for a few reasons. It is unnecessary
> because the EC will force reset either way. hw_protection_shutdown does
> not reliably sync filesystem before shutting down. emergency_sync is not
> synchronous so hw_protection_shutdown may interrupt emergency_sync.
>
> [...]
Here is the summary with links:
- drivers/cros_ec: Emergency sync filesystem on EC panic
https://git.kernel.org/chrome-platform/c/a6edd5f5d9cc
You are awesome, thank you!
--
Deet-doot-dot, I am a bot.
https://korg.docs.kernel.org/patchwork/pwbot.html