linux-kernel - Re: kmap_local semantics

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <20210318043656.GA26988@lst.de>
Date:   Thu, 18 Mar 2021 05:36:56 +0100
From:   Christoph Hellwig <hch@....de>
To:     Ira Weiny <ira.weiny@...el.com>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Christoph Hellwig <hch@....de>, linux-kernel@...r.kernel.org
Subject: Re: kmap_local semantics

On Wed, Mar 17, 2021 at 07:44:20PM -0700, Ira Weiny wrote:
> Agreed.  I'm Sorry, I did not word the above clearly enough.  Let me rephrase
> that.
> 
> Christoph, do you anticipate additional need to call kmap and hand the mappings
> to other threads?  If not then kmap_local is what you should use.  If so, I'd
> like to know why.

No.  Just looking into callers that want a mapping and then synchronously
wait for I/O.