Messages in this thread | ![/](/images/icornerl.gif) | | Subject | Re: SFFDC and blksize_size | From | David Woodhouse <> | Date | Mon, 10 Nov 2003 14:17:59 +0000 |
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On Mon, 2003-11-10 at 15:09 +0100, Jens Axboe wrote: > On Fri, Nov 07 2003, Simon Haynes wrote: > > > > I have been writing a block driver for SSFDC compliant SMC cards. This stuff > > allocates 16k blocks. When I get requests the transfers are split into the > > size I specifty in the blksize_size{MAJOR] array. It sems that most things > > Sounds like a bad way to do it. It's much better to prevent builds of > bigger requests than you can handle in one go. You don't mention what > kernel you are using, but both 2.4 and 2.6 can do this for you.
The problem is the other way round -- he wants request merging, and he's achieving this by setting the block size higher.... and observing a crash when he sets his block size higher than PAGE_SIZE.
-- dwmw2
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