Messages in this thread | | | Date | Sun, 23 Nov 2008 16:11:56 +0900 | From | Tejun Heo <> | Subject | Re: about TRIM/DISCARD support and barriers |
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Hello,
cc'ing Matthew whom I forgot to cc in the first message. Matthew, the original message is...
http://lkml.org/lkml/2008/11/22/260
Tejun Heo wrote: > Dongjun Shin who works for Samsung SSD dep asked me about libata TRIM > support and pointed me to the new DISCARD support David Woodhouse got > merged for 2.6.28. I took a look at the code and blk-layer > interface-wise we seemed to be ready both for filesystems and userland > (so that fsck or something which runs background can mark unused > blocks) but there doesn't seem to be any low level driver which > actually implements ->prepare_discard_fn or fs which sets the DISCARD > flag.
Dongjun, the only doc I can find about ATA TRIM is the following one.
http://t13.org/Documents/UploadedDocuments/docs2007/e07154r3-Data_Set_Management_Proposal_for_ATA-ACS2.pdf
And AFAICS this hasn't made into ACS yet. Is this what you guys are gonna implement and Windows7 is gonna use?
Thanks.
-- tejun
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