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Re: [PATCH v6 1/4] libata: Safely overwrite attached page in WRITE SAME xlat

From Tom Yan <tom.ty89@gmail.com>
Newsgroups linux.kernel
Subject Re: [PATCH v6 1/4] libata: Safely overwrite attached page in WRITE SAME xlat
Date 2016-08-23 10:00 +0200
Message-ID <s9eMN-Y4-13@gated-at.bofh.it> (permalink)
References (3 earlier) <s95zQ-3HK-61@gated-at.bofh.it> <s97ii-4By-9@gated-at.bofh.it> <s98o1-5uy-1@gated-at.bofh.it> <s9crD-85M-7@gated-at.bofh.it> <s9dnI-eE-17@gated-at.bofh.it>
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On 23 August 2016 at 06:20, Shaun Tancheff <shaun.tancheff@seagate.com> wrote:
> On Tue, Aug 23, 2016 at 12:26 AM, Tom Yan <tom.ty89@gmail.com> wrote:
>
>> It is always 1 merely because we prefer sticking to that. Say we want
>> to enable multi-block payload now, it won't be 1 anymore.
>
> Sorry, I though that DSM TRIM is using 512 bytes here because
> WRITE_SAME_16 has a payload of a single logical sector.

Nope, SCSI Write Same commands does not have payload (or in SCSI
terms, parameter list / data-out buffer).

>
>> Also note that the payload is NOT always fully-filled.
>
> Oh, I was considering filling the remainder of the buffer
> with 0's using memset() as you described to be "filly-filled"
> in this case. Sorry for the confusion.

Well yeah _after_ memset() it should always be "fully-filled" (i.e.
512-byte aligned).

>
> --
> Shaun Tancheff

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Thread

[PATCH v6 1/4] libata: Safely overwrite attached page in WRITE SAME xlat Shaun Tancheff <shaun@tancheff.com> - 2016-08-22 06:30 +0200
  Re: [PATCH v6 1/4] libata: Safely overwrite attached page in WRITE  SAME xlat Hannes Reinecke <hare@suse.de> - 2016-08-22 08:30 +0200
  Re: [PATCH v6 1/4] libata: Safely overwrite attached page in WRITE  SAME xlat Tom Yan <tom.ty89@gmail.com> - 2016-08-22 21:30 +0200
    Re: [PATCH v6 1/4] libata: Safely overwrite attached page in WRITE  SAME xlat Shaun Tancheff <shaun.tancheff@seagate.com> - 2016-08-22 22:00 +0200
      Re: [PATCH v6 1/4] libata: Safely overwrite attached page in WRITE  SAME xlat Tom Yan <tom.ty89@gmail.com> - 2016-08-22 22:20 +0200
  Re: [PATCH v6 1/4] libata: Safely overwrite attached page in WRITE  SAME xlat Tom Yan <tom.ty89@gmail.com> - 2016-08-22 23:30 +0200
    Re: [PATCH v6 1/4] libata: Safely overwrite attached page in WRITE  SAME xlat Shaun Tancheff <shaun.tancheff@seagate.com> - 2016-08-23 00:10 +0200
      Re: [PATCH v6 1/4] libata: Safely overwrite attached page in WRITE  SAME xlat Tom Yan <tom.ty89@gmail.com> - 2016-08-23 02:00 +0200
        Re: [PATCH v6 1/4] libata: Safely overwrite attached page in WRITE  SAME xlat Shaun Tancheff <shaun.tancheff@seagate.com> - 2016-08-23 03:10 +0200
          Re: [PATCH v6 1/4] libata: Safely overwrite attached page in WRITE  SAME xlat Tom Yan <tom.ty89@gmail.com> - 2016-08-23 07:30 +0200
            Re: [PATCH v6 1/4] libata: Safely overwrite attached page in WRITE  SAME xlat Shaun Tancheff <shaun.tancheff@seagate.com> - 2016-08-23 08:30 +0200
              Re: [PATCH v6 1/4] libata: Safely overwrite attached page in WRITE  SAME xlat Tom Yan <tom.ty89@gmail.com> - 2016-08-23 10:00 +0200
                Re: [PATCH v6 1/4] libata: Safely overwrite attached page in WRITE  SAME xlat Shaun Tancheff <shaun.tancheff@seagate.com> - 2016-08-23 11:00 +0200
                Re: [PATCH v6 1/4] libata: Safely overwrite attached page in WRITE  SAME xlat Tom Yan <tom.ty89@gmail.com> - 2016-08-23 12:10 +0200
                Re: [PATCH v6 1/4] libata: Safely overwrite attached page in WRITE SAME xlat "Martin K. Petersen" <martin.petersen@oracle.com> - 2016-08-24 05:40 +0200
                Re: [PATCH v6 1/4] libata: Safely overwrite attached page in WRITE  SAME xlat Tom Yan <tom.ty89@gmail.com> - 2016-08-24 07:50 +0200
                Re: [PATCH v6 1/4] libata: Safely overwrite attached page in WRITE  SAME xlat Shaun Tancheff <shaun.tancheff@seagate.com> - 2016-08-24 23:50 +0200
                Re: [PATCH v6 1/4] libata: Safely overwrite attached page in WRITE  SAME xlat Tom Yan <tom.ty89@gmail.com> - 2016-08-25 08:40 +0200
                Re: [PATCH v6 1/4] libata: Safely overwrite attached page in WRITE  SAME xlat Shaun Tancheff <shaun.tancheff@seagate.com> - 2016-08-25 09:20 +0200

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