Messages in this thread | | | From | Simon Haynes <> | Subject | SFFDC and blksize_size | Date | Fri, 7 Nov 2003 13:12:54 +0000 |
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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 set this to 1k. In my case this causes a performance problem as I have to end up doing 16 * (16K write, 16K read, 16k erase) to write and verify a 16k block which has been previously written. I increased this size to 4k and now I only need 4 * this lot. !deally I would like to do 1. However if I set the block size to 16k the module installation crashes when I call register_disk.
I guess I could deal with the request queue myself but I would just like to know if there is a 4k limit or I have some other bug.
Many Thanks
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