Message-ID: <Z1P-vf-5_Ai51QTA@liuwe-devbox-debian-v2>
Date: Sat, 7 Dec 2024 07:52:29 +0000
From: Wei Liu <wei.liu@...nel.org>
To: Easwar Hariharan <eahariha@...ux.microsoft.com>
Cc: "K. Y. Srinivasan" <kys@...rosoft.com>,
	Haiyang Zhang <haiyangz@...rosoft.com>,
	Wei Liu <wei.liu@...nel.org>, Dexuan Cui <decui@...rosoft.com>,
	linux-hyperv@...r.kernel.org,
	Anna-Maria Behnsen <anna-maria@...utronix.de>,
	Thomas Gleixner <tglx@...utronix.de>,
	Geert Uytterhoeven <geert@...ux-m68k.org>,
	Marcel Holtmann <marcel@...tmann.org>,
	Johan Hedberg <johan.hedberg@...il.com>,
	Luiz Augusto von Dentz <luiz.dentz@...il.com>,
	linux-bluetooth@...r.kernel.org, linux-kernel@...r.kernel.org,
	Praveen Kumar <kumarpraveen@...ux.microsoft.com>,
	Naman Jain <namjain@...ux.microsoft.com>,
	Michael Kelley <mhklinux@...look.com>
Subject: Re: [PATCH v3 2/2] drivers: hv: Convert open-coded timeouts to
 secs_to_jiffies()

On Wed, Oct 30, 2024 at 05:47:36PM +0000, Easwar Hariharan wrote:
> We have several places where timeouts are open-coded as N (seconds) * HZ,
> but best practice is to use the utility functions from jiffies.h. Convert
> the timeouts to be compliant. This doesn't fix any bugs, it's a simple code
> improvement.
> 
> TO: "K. Y. Srinivasan" <kys@...rosoft.com>
> TO: Haiyang Zhang <haiyangz@...rosoft.com>
> TO: Wei Liu <wei.liu@...nel.org>
> TO: Dexuan Cui <decui@...rosoft.com>
> TO: linux-hyperv@...r.kernel.org
> TO: Anna-Maria Behnsen <anna-maria@...utronix.de>
> TO: Thomas Gleixner <tglx@...utronix.de>
> TO: Geert Uytterhoeven <geert@...ux-m68k.org>
> TO: Marcel Holtmann <marcel@...tmann.org>
> TO: Johan Hedberg <johan.hedberg@...il.com>
> TO: Luiz Augusto von Dentz <luiz.dentz@...il.com>
> TO: linux-bluetooth@...r.kernel.org
> TO: linux-kernel@...r.kernel.org
> CC: Michael Kelley <mhklinux@...look.com>

In the future you can put these items after the --- line, so that they
are stripped when the patch is applied.

> Signed-off-by: Easwar Hariharan <eahariha@...ux.microsoft.com>

The first patch is already in.

I applied this patch to hyperv-fixes. Thanks.

> ---
>  drivers/hv/hv_balloon.c  | 9 +++++----
>  drivers/hv/hv_kvp.c      | 4 ++--
>  drivers/hv/hv_snapshot.c | 3 ++-
>  drivers/hv/vmbus_drv.c   | 2 +-
>  4 files changed, 10 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/hv/hv_balloon.c b/drivers/hv/hv_balloon.c
> index c38dcdfcb914dcc3515be100cba0beb4a3f9b975..a99112e6f0b8534cf5c8c963e343019061bd34f6 100644
> --- a/drivers/hv/hv_balloon.c
> +++ b/drivers/hv/hv_balloon.c
> @@ -756,7 +756,7 @@ static void hv_mem_hot_add(unsigned long start, unsigned long size,
>  		 * adding succeeded, it is ok to proceed even if the memory was
>  		 * not onlined in time.
>  		 */
> -		wait_for_completion_timeout(&dm_device.ol_waitevent, 5 * HZ);
> +		wait_for_completion_timeout(&dm_device.ol_waitevent, secs_to_jiffies(5));
>  		post_status(&dm_device);
>  	}
>  }
> @@ -1373,7 +1373,8 @@ static int dm_thread_func(void *dm_dev)
>  	struct hv_dynmem_device *dm = dm_dev;
>  
>  	while (!kthread_should_stop()) {
> -		wait_for_completion_interruptible_timeout(&dm_device.config_event, 1 * HZ);
> +		wait_for_completion_interruptible_timeout(&dm_device.config_event,
> +								secs_to_jiffies(1));
>  		/*
>  		 * The host expects us to post information on the memory
>  		 * pressure every second.
> @@ -1748,7 +1749,7 @@ static int balloon_connect_vsp(struct hv_device *dev)
>  	if (ret)
>  		goto out;
>  
> -	t = wait_for_completion_timeout(&dm_device.host_event, 5 * HZ);
> +	t = wait_for_completion_timeout(&dm_device.host_event, secs_to_jiffies(5));
>  	if (t == 0) {
>  		ret = -ETIMEDOUT;
>  		goto out;
> @@ -1806,7 +1807,7 @@ static int balloon_connect_vsp(struct hv_device *dev)
>  	if (ret)
>  		goto out;
>  
> -	t = wait_for_completion_timeout(&dm_device.host_event, 5 * HZ);
> +	t = wait_for_completion_timeout(&dm_device.host_event, secs_to_jiffies(5));
>  	if (t == 0) {
>  		ret = -ETIMEDOUT;
>  		goto out;
> diff --git a/drivers/hv/hv_kvp.c b/drivers/hv/hv_kvp.c
> index d35b60c0611486c8c909d2f8f7c730ff913df30d..29e01247a0870fdb9eebd92bdd16fd371450240c 100644
> --- a/drivers/hv/hv_kvp.c
> +++ b/drivers/hv/hv_kvp.c
> @@ -655,7 +655,7 @@ void hv_kvp_onchannelcallback(void *context)
>  		if (host_negotiatied == NEGO_NOT_STARTED) {
>  			host_negotiatied = NEGO_IN_PROGRESS;
>  			schedule_delayed_work(&kvp_host_handshake_work,
> -				      HV_UTIL_NEGO_TIMEOUT * HZ);
> +						secs_to_jiffies(HV_UTIL_NEGO_TIMEOUT));
>  		}
>  		return;
>  	}
> @@ -724,7 +724,7 @@ void hv_kvp_onchannelcallback(void *context)
>  		 */
>  		schedule_work(&kvp_sendkey_work);
>  		schedule_delayed_work(&kvp_timeout_work,
> -					HV_UTIL_TIMEOUT * HZ);
> +				      secs_to_jiffies(HV_UTIL_TIMEOUT));
>  
>  		return;
>  
> diff --git a/drivers/hv/hv_snapshot.c b/drivers/hv/hv_snapshot.c
> index 0d2184be16912559a8cfa784c762e6418ebd3279..86d87486ed40b3ca9f6674650e5a86a7184e2fa6 100644
> --- a/drivers/hv/hv_snapshot.c
> +++ b/drivers/hv/hv_snapshot.c
> @@ -193,7 +193,8 @@ static void vss_send_op(void)
>  	vss_transaction.state = HVUTIL_USERSPACE_REQ;
>  
>  	schedule_delayed_work(&vss_timeout_work, op == VSS_OP_FREEZE ?
> -			VSS_FREEZE_TIMEOUT * HZ : HV_UTIL_TIMEOUT * HZ);
> +				secs_to_jiffies(VSS_FREEZE_TIMEOUT) :
> +				secs_to_jiffies(HV_UTIL_TIMEOUT));
>  
>  	rc = hvutil_transport_send(hvt, vss_msg, sizeof(*vss_msg), NULL);
>  	if (rc) {
> diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c
> index 9b15f7daf5059750e17ea3607b52dee967c1c059..7db30881e83ad4b406413641413d68329fc663e2 100644
> --- a/drivers/hv/vmbus_drv.c
> +++ b/drivers/hv/vmbus_drv.c
> @@ -2507,7 +2507,7 @@ static int vmbus_bus_resume(struct device *dev)
>  	vmbus_request_offers();
>  
>  	if (wait_for_completion_timeout(
> -		&vmbus_connection.ready_for_resume_event, 10 * HZ) == 0)
> +		&vmbus_connection.ready_for_resume_event, secs_to_jiffies(10)) == 0)
>  		pr_err("Some vmbus device is missing after suspending?\n");
>  
>  	/* Reset the event for the next suspend. */
> 
> -- 
> 2.34.1
> 

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