Re: [PATCH] mmc: core: add auto bkops support

From	Ulf Hansson <ulf.hansson@linaro.org>
Newsgroups	linux.kernel
Subject	Re: [PATCH] mmc: core: add auto bkops support
Date	2016-06-27 11:10 +0200
Message-ID	<rOAIi-6Df-7@gated-at.bofh.it> (permalink)
References	(3 earlier) <rM83M-OW-11@gated-at.bofh.it> <rMj8S-7Dk-13@gated-at.bofh.it> <rMRkd-4AB-5@gated-at.bofh.it> <rN1MB-2UJ-1@gated-at.bofh.it> <rN5nb-5t9-5@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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[...]

>>> If I am not wrong, in current implementation of runtime suspend,
>>> the driver stops BKOPS (send HPI) just before sending sleep command,
>>> see _mmc_suspend(), depends on “MMC_CAP_AGGRESSIVE_PM” flag.
>>> In this case, the eMMC device will not have enough time to perform internal
>>> BKOPS in both – Manual and Auto BKOPS configurations.
>>>
>>
>> ye, so it seems a pre-exiting issue before introducing auto bkops?
>> I think we can push another patch to improve it but not handling
>> it for this $SUBJECT, does it sound ok to you?
>
> Runtime suspend for eMMC has a default auto-suspend delay of 3 seconds
> (refer mmc_blk_probe()).  Isn't that when auto bkops would happen?

That's correct.

So perhaps we should extend the default auto-suspend delay?

The SD case actually have the same issue, as I some background
operations exists there as well.

[...]

Kind regards
Uffe

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Re: [PATCH] mmc: core: add auto bkops support Ulf Hansson <ulf.hansson@linaro.org> - 2016-06-27 11:10 +0200
  Re: [PATCH] mmc: core: add auto bkops support Alex Lemberg <Alex.Lemberg@sandisk.com> - 2016-06-27 13:50 +0200

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