linux-kernel - Re: [PATCH 2/2] block: create ioctl to discard-or-zeroout a range of blocks

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Message-ID: <yq14mc38sca.fsf@sermon.lab.mkp.net>
Date:	Fri, 18 Mar 2016 16:05:25 -0400
From:	"Martin K. Petersen" <martin.petersen@...cle.com>
To:	Jeff Moyer <jmoyer@...hat.com>
Cc:	"Theodore Ts'o" <tytso@....edu>, Chris Mason <clm@...com>,
	Andreas Dilger <adilger@...ger.ca>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Gregory Farnum <greg@...gs42.com>,
	Eric Sandeen <sandeen@...hat.com>,
	"Darrick J. Wong" <darrick.wong@...cle.com>,
	Dave Chinner <david@...morbit.com>,
	Ric Wheeler <rwheeler@...hat.com>,
	Andy Lutomirski <luto@...capital.net>,
	One Thousand Gnomes <gnomes@...rguk.ukuu.org.uk>,
	Martin Petersen <martin.petersen@...cle.com>,
	Christoph Hellwig <hch@...radead.org>,
	Jens Axboe <axboe@...nel.dk>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linux API <linux-api@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	shane.seymour@....com, Bruce Fields <bfields@...ldses.org>,
	linux-fsdevel <linux-fsdevel@...r.kernel.org>,
	Jeff Layton <jlayton@...chiereds.net>
Subject: Re: [PATCH 2/2] block: create ioctl to discard-or-zeroout a range of blocks

>>>>> "Jeff" == Jeff Moyer <jmoyer@...hat.com> writes:

Jeff> TRIM/UNMAP isn't just supported on solid state devices, though.  I
Jeff> do recall some enterprise thinly provisioned storage that would
Jeff> take ages to discard large regions.  I think that caused us to
Jeff> change the defaults for mkfs, right?

I think those have largely been fixed. But, yes.

-- 
Martin K. Petersen	Oracle Linux Engineering