linux-kernel - RE: [PATCH] habanalabs: rate limit error msg on waiting for CS

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Message-ID: <VI1PR02MB305448F610A65F0BD205737DD25D0@VI1PR02MB3054.eurprd02.prod.outlook.com>
Date:   Wed, 4 Dec 2019 08:01:17 +0000
From:   Tomer Tayar <ttayar@...ana.ai>
To:     Oded Gabbay <oded.gabbay@...il.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Omer Shpigelman <oshpigelman@...ana.ai>
CC:     "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>
Subject: RE: [PATCH] habanalabs: rate limit error msg on waiting for CS

On Tue, Dec 3, 2019 at 22:28, Oded Gabbay <oded.gabbay@...il.com> wrote:
> In case a user submits a CS, and the submission fails, and the user doesn't
> check the return value and instead use the error return value as a valid
> sequence number of a CS and ask to wait on it, the driver will print an
> error and return an error code for that wait.
> 
> The real problem happens if now the user ignores the error of the wait, and
> try to wait again and again. This can lead to a flood of error messages
> from the driver and even soft lockup event.
> 
> Signed-off-by: Oded Gabbay <oded.gabbay@...il.com>

Reviewed-by: Tomer Tayar <ttayar@...ana.ai>