Re: [PATCH 4/5] libata: Report zeroed read after Trim and max discard size

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On 11/26/2009 10:46 PM, Martin K. Petersen wrote:
"Mark" == Mark Lord<kernel@xxxxxxxxxxxx>  writes:

Mark>  Is that correct, or should it be this:

Mark>         if (ata_id_has_trim(id)&&  (id[ATA_ID_ADDITIONAL_SUPP]&
Mark>         0x4020) == 0x4020)

Good spotting!  You are right, I need both bits to be set...


libata: Report zeroed read after Trim and max discard size

Our current Trim payload is a single sector that can accommodate 64 *
65535 blocks being unmapped.  Report this value in the Block Limits
Maximum Unmap LBA count field.

If a storage device supports Trim and the DRAT and RZAT bits are set,
report TPRZ=1 in Read Capacity(16).

Signed-off-by: Martin K. Petersen<martin.petersen@xxxxxxxxxx>

The two libata patches look good. I need to review the thread one more time, and then will apply these...


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