Date: Thu, 9 Jan 2014 13:38:05 -0500 From: Garrett Wollman <wollman@csail.mit.edu> To: "Steven Hartland" <killing@multiplay.co.uk> Cc: freebsd-scsi@freebsd.org Subject: Re: Attempting ATA TRIM on SAS devices? Message-ID: <21198.60557.126129.808095@khavrinen.csail.mit.edu> In-Reply-To: <A87BDB528EC946A4B8D50F89FBBC76EA@multiplay.co.uk> References: <21197.39676.138433.937002@khavrinen.csail.mit.edu> <430F34AB88D44C4BAF31DDC7AD214137@multiplay.co.uk> <21197.47504.93295.771468@khavrinen.csail.mit.edu> <CE07448557D04B6DAD7A2A1636EC462A@multiplay.co.uk> <21197.56484.67992.739053@khavrinen.csail.mit.edu> <D05A3164F6D945619B62945B1C9CCC1A@multiplay.co.uk> <21197.59350.752519.254639@khavrinen.csail.mit.edu> <A87BDB528EC946A4B8D50F89FBBC76EA@multiplay.co.uk>
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<<On Thu, 9 Jan 2014 00:14:02 -0000, "Steven Hartland" <killing@multiplay.co.uk> said: >> I'm not sure that that works, given that the zpool is auto-imported at >> boot time and I don't know which da units will be assigned to the SSDs >> in question (no way to pin them so far as I can tell). Does ZFS >> generate BIO_DELETE on the cache devices at any time other than pool >> import? > Yes on every delete, What do you mean by "on every delete"? Do you mean whenever a block is evicted from the L2ARC? -GAWollman
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