Messages in this thread | | | Date | Wed, 08 May 2002 17:07:24 -0700 | From | Andrew Morton <> | Subject | Re: Reading page from given block device |
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Pavel Machek wrote: > > ... > Second try: > > c0134a28 -- __getblk > __get_hash_table
hmm. It looks like your blockdev may have the wrong blocksize in bd_inode->i_blkbits, and __get_hash_table cannot find the 4k block against the 1k blocksize device. It keeps returning zero.
The new pagecache-based __get_hash_table uses bd_inode->i_blkbits to go from a block number to a pagecache index. That works fine when called via the official `bread()' function, but probably your __bread() approach has confused it.
Try running set_blocksize(bdev, PAGE_SIZE) before calling __bread().
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