linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Luben Tuikov <luben@splentec.com>
To: Jens Axboe <axboe@suse.de>
Cc: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: struct page question
Date: Wed, 25 Sep 2002 16:56:51 -0400	[thread overview]
Message-ID: <3D922313.24B59088@splentec.com> (raw)
In-Reply-To: 20020925073430.GG15479@suse.de

Jens Axboe wrote:
> 
> > Apparently I cannot just set b_data and b_size, b_page
> > also has to be set and it also seems that it will
> > not work if page_address(b_page) != b_data...
> 
> bh->b_page = virt_to_page(va);
> bh->b_data = va;

Thanks Jens again.

My doubts are that va might not point to page->virtual,
but may point ``in the middle'' of the page, in which case
md will cough up since it does the page_address(b_page) != b_data
then BUG()...

I.e. I cannot guarantee about where va points (just that it is NOT
highmem).

-- 
Luben

  reply	other threads:[~2002-09-25 20:51 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2002-09-24 21:10 struct page question Luben Tuikov
2002-09-25  7:34 ` Jens Axboe
2002-09-25 20:56   ` Luben Tuikov [this message]
2002-09-26  5:33     ` Jens Axboe

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=3D922313.24B59088@splentec.com \
    --to=luben@splentec.com \
    --cc=axboe@suse.de \
    --cc=linux-kernel@vger.kernel.org \
    /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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).