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  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:   Wed, 23 Jan 2019 19:27:12 +0100
From:   Javier González <javier@...igon.com>
To:     Kanchan Joshi <joshi.k@...sung.com>
Cc:     linux-fsdevel@...r.kernel.org, linux-block@...r.kernel.org,
        linux-ext4@...r.kernel.org, linux-nvme@...ts.infradead.org,
        jack@...e.com, david@...morbit.com, tytso@....edu,
        prakash.v@...sung.com
Subject: Re: [PATCH 2/4] introduce four macros for in-kernel hints


> On 9 Jan 2019, at 16.30, Kanchan Joshi <joshi.k@...sung.com> wrote:
> 
> Exiting write-hints are exposed to user-mode. There is a possiblity
> of conflict if kernel happens to use those. This patch introduces four
> write-hints for exclusive kernel-mode use.
> 
> Signed-off-by: Kanchan Joshi <joshi.k@...sung.com>
> ---
> include/linux/fs.h | 5 +++++
> 1 file changed, 5 insertions(+)
> 
> diff --git a/include/linux/fs.h b/include/linux/fs.h
> index 811c777..e8548eb 100644
> --- a/include/linux/fs.h
> +++ b/include/linux/fs.h
> @@ -291,6 +291,11 @@ enum rw_hint {
> 	WRITE_LIFE_MEDIUM	= RWH_WRITE_LIFE_MEDIUM,
> 	WRITE_LIFE_LONG		= RWH_WRITE_LIFE_LONG,
> 	WRITE_LIFE_EXTREME	= RWH_WRITE_LIFE_EXTREME,
> +/* below ones are meant for in-kernel use */
> +	KERN_WRITE_LIFE_SHORT,
> +	KERN_WRITE_LIFE_MEDIUM,
> +	KERN_WRITE_LIFE_LONG,
> +	KERN_WRITE_LIFE_EXTREME
> };
> 

I think Jens and Dave meant kernel hints to go top down. This would also
give space for supporting more hints / streams from both ends for user
and kernel.

Javier

Download attachment "signature.asc" of type "application/pgp-signature" (834 bytes)

Powered by blists - more mailing lists