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Message-Id: <E1OxgCu-0000XW-29@tytso-glaptop> Date: Mon, 20 Sep 2010 09:14:56 -0400 From: "Theodore Ts'o" <tytso@....edu> To: linux-ext4@...r.kernel.org, dm-devel@...hat.com Subject: Is it deliberate that the device mapper is not passing the DISCARD ioctls Hi there, I was just testing discard support in mke2fs, and I was surprised that although the dm layer appears to pass discard requests through to the underlying block device driver when submitted through the bio layer (i.e., from kernel file systems), apparently the discard ioctls (i.e., BLKDISCARD, BLKDISCARDSEC, BLKDISCARDZEROES) are not currently wired up in the dm layer. Is this deliberate, or an oversight? Thanks, regards, - Ted -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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