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 Reading page from given block device 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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=3CD9BDBC.A5B52E8C@zip.com.au \
--to=akpm@zip.com.au \
--cc=linux-kernel@vger.kernel.org \
--cc=pavel@ucw.cz \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.