Messages in this thread | ![/](/images/icornerl.gif) | | Date | Mon, 10 Nov 2003 15:23:41 +0100 | From | Jens Axboe <> | Subject | Re: SFFDC and blksize_size |
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On Mon, Nov 10 2003, David Woodhouse wrote: > 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.
Yes I know, but he doesn't want requests merged > 16k, right? So it's stupid to allow these to get through.
-- Jens Axboe
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