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    SubjectRe: DIRECT IO for ext3/ext2.
    > Thanks for your reply. I looked into the boundary alignment issue.
    > Observed something strange happening;
    > I wrote my own kernel module and then;
    > 1. retrieved the block size = 4096 using block_size(struct block_device
    > *bdev)
    > 2. in the user application i did a lseek by 4906 (block size seek)
    > 3. then found the address of the variable i wanted to read into, to be
    > block
    > size aligned.
    > However, the read still seems to fail with the O_DIRECT flag specified.
    > The same check _passes if i do not specify the flag in open of the
    > device.
    > Boundary issues seem to be not the cause of failure here.
    > Would have any more kind suggestions on something that i should do or
    > could be missing on?

    Is the size of the data you are reading also a multiple the block size? (It
    should be.)



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