Re: [PATCH 1/2] net/mlx5: increase async EQ to avoid EQ overrun

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On Mon, Feb 05, 2018 at 04:29:51PM +0200, Max Gurtovoy wrote:
> Currently the async EQ has 256 entries only. It might not be big enough
> for the SW to handle all the needed pending events. For example, in case
> of many QPs (let's say 1024) connected to a SRQ created using NVMeOF target
> and the target goes down, the FW will raise 1024 "last WQE reached" events
> and may cause EQ overrun. Increase the EQ to more reasonable size, that beyond
> it the FW should be able to delay the event and raise it later on using internal
> backpressure mechanism.

If the firmware has an internal backpressure meachanism then why
would we get a EQ overrun?

Do we need to block adding too many QPs to a SRQ as well or something
like that?

Jason
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