linux-ext4 - Re: [PATCH] fscrypt: optimize fscrypt_zeroout

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: <20200114205302.GA41220@gmail.com>
Date:   Tue, 14 Jan 2020 12:53:03 -0800
From:   Eric Biggers <ebiggers@...nel.org>
To:     linux-fscrypt@...r.kernel.org
Cc:     linux-ext4@...r.kernel.org
Subject: Re: [PATCH] fscrypt: optimize fscrypt_zeroout_range()

On Thu, Dec 26, 2019 at 10:08:13AM -0600, Eric Biggers wrote:
> From: Eric Biggers <ebiggers@...gle.com>
> 
> Currently fscrypt_zeroout_range() issues and waits on a bio for each
> block it writes, which makes it very slow.
> 
> Optimize it to write up to 16 pages at a time instead.
> 
> Also add a function comment, and improve reliability by allowing the
> allocations of the bio and the first ciphertext page to wait on the
> corresponding mempools.
> 
> Signed-off-by: Eric Biggers <ebiggers@...gle.com>
> ---
>  fs/crypto/bio.c | 112 ++++++++++++++++++++++++++++++++++--------------
>  1 file changed, 81 insertions(+), 31 deletions(-)

Applied to fscrypt.git#master for 5.6.

- Eric