Messages in this thread | | | Date | Wed, 22 Feb 2006 12:23:08 -0500 | From | Peter Staubach <> | Subject | Re: [PATCH 0/3] map multiple blocks in get_block() and mpage_readpages() |
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Badari Pulavarty wrote:
> >Thanks. Only current issue Nathan raised is, he wants to see >b_size change to u64 (instead of u32) to support really-huge-IO >requests. Does this sound reasonable to you ? >
I believe that the various read and write system calls impose a 32 bit limit on the size of the i/o request, so you may need to look at that too.
Increasing the size of b_size would address a bug which exists when trying to read more than 4GB from a block device which is greater than 4GB in size. Currently, that bug is masked because the maximum system call size is arbitrarily limited.
Thanx...
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