From: Gerd Knorr <kraxel@bytesex.org>
To: linux-kernel@vger.kernel.org
Subject: Re: Problem with map_user_kiobuf() not mapping to physical memory
Date: 2 May 2001 19:17:51 GMT [thread overview]
Message-ID: <slrn9f0nav.18a.kraxel@bytesex.org> (raw)
In-Reply-To: <3AF028D3.8EE24BE1@beam.demon.co.uk>
> to the driver which performs a map_user_kiobuf() on it, the resulting
> kiobuf
> structure has all of the pagelist[] physical address entries set to the
> same value
> and the maplist[] entries set to 0. The devices access to this memory
> now
> causes system problems.
> Is map_user_kiobuf() working correctly ?
Yes, it is. You have to lock down the pages for I/O with
lock_kiovec() before using the maplist. The locking will
also fault the pages if needed.
Gerd
--
sigfault (core dumped)
prev parent reply other threads:[~2001-05-02 20:57 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-05-02 15:33 Problem with map_user_kiobuf() not mapping to physical memory Terry Barnaby
2001-05-02 14:34 ` Bjorn Wesen
2001-05-02 19:17 ` Gerd Knorr [this message]
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=slrn9f0nav.18a.kraxel@bytesex.org \
--to=kraxel@bytesex.org \
--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 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.