From: Andrew Morton <akpm@zip.com.au>
To: Pavel Machek <pavel@ucw.cz>
Cc: kernel list <linux-kernel@vger.kernel.org>
Subject: Re: Reading page from given block device
Date: Wed, 08 May 2002 17:07:24 -0700 [thread overview]
Message-ID: <3CD9BDBC.A5B52E8C@zip.com.au> (raw)
In-Reply-To: <20020508204809.GA2300@elf.ucw.cz> <3CD996E5.BFB5CF9E@zip.com.au> <20020508225603.GA11842@atrey.karlin.mff.cuni.cz> <3CD9AE15.114D13E3@zip.com.au> <20020508231520.GC11842@atrey.karlin.mff.cuni.cz>
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().
-
next prev parent reply other threads:[~2002-05-09 0:08 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-05-08 20:48 Pavel Machek
2002-05-08 21:21 ` Andrew Morton
2002-05-08 21:30 ` Andrew Morton
2002-05-08 22:56 ` Pavel Machek
[not found] ` <3CD9AE15.114D13E3@zip.com.au>
2002-05-08 23:15 ` Pavel Machek
2002-05-09 0:07 ` Andrew Morton [this message]
2002-05-09 4:42 ` Alexander Viro
2002-05-09 21:36 ` Pavel Machek
2002-05-09 21:45 ` Alexander Viro
2002-05-08 22:59 ` Pavel Machek
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