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

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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