Messages in this thread | | | Date | Wed, 22 Jan 2014 09:10:48 -0500 | From | Ric Wheeler <> | Subject | Re: [Lsf-pc] [LSF/MM TOPIC] really large storage sectors - going beyond 4096 bytes |
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On 01/22/2014 04:34 AM, Mel Gorman wrote: > On Tue, Jan 21, 2014 at 10:04:29PM -0500, Ric Wheeler wrote: >> One topic that has been lurking forever at the edges is the current >> 4k limitation for file system block sizes. Some devices in >> production today and others coming soon have larger sectors and it >> would be interesting to see if it is time to poke at this topic >> again. >> > Large block support was proposed years ago by Christoph Lameter > (http://lwn.net/Articles/232757/). I think I was just getting started > in the community at the time so I do not recall any of the details. I do > believe it motivated an alternative by Nick Piggin called fsblock though > (http://lwn.net/Articles/321390/). At the very least it would be nice to > know why neither were never merged for those of us that were not around > at the time and who may not have the chance to dive through mailing list > archives between now and March. > > FWIW, I would expect that a show-stopper for any proposal is requiring > high-order allocations to succeed for the system to behave correctly. >
I have a somewhat hazy memory of Andrew warning us that touching this code takes us into dark and scary places.
ric
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