Messages in this thread | | | Date | Mon, 17 Aug 2009 16:19:39 -0400 | From | Mark Lord <> | Subject | Re: Discard support (was Re: [PATCH] swap: send callback when swap slot is freed) |
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James Bottomley wrote: > On Mon, 2009-08-17 at 14:21 -0400, Greg Freemyer wrote: >> On Mon, Aug 17, 2009 at 1:19 PM, James Bottomley<James.Bottomley@suse.de> wrote: >>> On Mon, 2009-08-17 at 13:08 -0400, Greg Freemyer wrote: .. >>>> Non-coalescing is believed detrimental, >>> It is? Why? >> For the only compliant SSD in the wild, Mark has shown it to be true >> via testing. > > He only said larger trims take longer. As I said previously, if it's a > X+nY relationship, then we still benefit from accumulation up to some > value of n. ..
Err, what I said was, "rm -rf /usr/src/linux" takes over half an hour with uncoalesced TRIM, and only a scant few seconds in total *with* coalesced TRIM.
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