Re: RFC: 32-bit __data_len and REQ_DISCARD+REQ_SECURE

From	Jeff Moyer <jmoyer@redhat.com>
Newsgroups	linux.kernel
Subject	Re: RFC: 32-bit __data_len and REQ_DISCARD+REQ_SECURE
Date	2015-10-28 23:20 +0100
Message-ID	<qoHex-5t-13@gated-at.bofh.it> (permalink)
References	(2 earlier) <qdOt4-3rn-11@gated-at.bofh.it> <qdOt4-3rn-9@gated-at.bofh.it> <qlJmy-2y3-15@gated-at.bofh.it> <qlKiC-3V5-3@gated-at.bofh.it> <qlXzc-6P0-23@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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Ulf Hansson <ulf.hansson@linaro.org> writes:

> I am not sure if this issue is the same as been discussed earlier on
> the mmc list regarding "discard/erase".
>
> Anyway, there have been several attempts to fix bugs related to this.
> One of these discussion kind of pointed out a viable solution, but
> unfortunate no patches that adopts that solution have been posted yet.
>
> You might want to read up on this.
> https://www.mail-archive.com/linux-mmc@vger.kernel.org/msg23643.html
> http://linux-mmc.vger.kernel.narkive.com/Wp31G953/patch-mmc-core-don-t-return-1-for-max-discard
>
> So this is an old issue, which should have been fixed long long long time ago...

Thanks Ulf.  After reading all of the linked discussions, it's my
understanding that this is an emmc-specific issue that doesn't require
any block layer changes.  If that's wrong, please let me know.

Cheers,
Jeff
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Thread

Re: RFC: 32-bit __data_len and REQ_DISCARD+REQ_SECURE Grant Grundler <grundler@chromium.org> - 2015-10-20 20:00 +0200
  Re: RFC: 32-bit __data_len and REQ_DISCARD+REQ_SECURE Jeff Moyer <jmoyer@redhat.com> - 2015-10-20 21:00 +0200
    Re: RFC: 32-bit __data_len and REQ_DISCARD+REQ_SECURE Ulf Hansson <ulf.hansson@linaro.org> - 2015-10-21 11:10 +0200
      Re: RFC: 32-bit __data_len and REQ_DISCARD+REQ_SECURE Grant Grundler <grundler@chromium.org> - 2015-10-21 19:10 +0200
      Re: RFC: 32-bit __data_len and REQ_DISCARD+REQ_SECURE Jeff Moyer <jmoyer@redhat.com> - 2015-10-28 23:20 +0100
    Re: RFC: 32-bit __data_len and REQ_DISCARD+REQ_SECURE Grant Grundler <grundler@chromium.org> - 2015-10-21 19:40 +0200

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