Re: [PATCH v5 2/2] Add support for SCT Write Same

From	"Martin K. Petersen" <martin.petersen@oracle.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH v5 2/2] Add support for SCT Write Same
Date	2016-08-12 03:20 +0200
Message-ID	<s59iG-3m5-5@gated-at.bofh.it> (permalink)
References	(3 earlier) <s4Gqo-b4-135@gated-at.bofh.it> <s4Gqo-b4-137@gated-at.bofh.it> <s4Gqo-b4-139@gated-at.bofh.it> <s4Ni9-4Db-1@gated-at.bofh.it> <s4TQC-1tP-31@gated-at.bofh.it>
Organization	Oracle Corporation

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>>>>> "Tom" == Tom Yan <tom.ty89@gmail.com> writes:

>> Many drives from different vendors were affected by this. So we'd
>> have to make multi block payloads an explicit opt-in like we did for
>> discard_zeroes_data. However, given that "big" discards are mainly
>> done synchronously when creating filesystems, I am not sure there is
>> any real benefit to this.

Tom> Probably. Perhaps it could make a difference upon deletion of some
Tom> really big files (though the logical sectors used may not be
Tom> continuous anyway).

Nope. And you've got the bio size limit getting in the way as well.

-- 
Martin K. Petersen	Oracle Linux Engineering

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Re: [PATCH v5 2/2] Add support for SCT Write Same "Martin K. Petersen" <martin.petersen@oracle.com> - 2016-08-11 03:50 +0200
  Re: [PATCH v5 2/2] Add support for SCT Write Same Tom Yan <tom.ty89@gmail.com> - 2016-08-11 10:50 +0200
    Re: [PATCH v5 2/2] Add support for SCT Write Same "Martin K. Petersen" <martin.petersen@oracle.com> - 2016-08-12 03:20 +0200

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