From: "Darrick J. Wong" <darrick.wong@oracle.com>
To: Andreas Dilger <adilger@dilger.ca>
Cc: "Ts'o Theodore" <tytso@mit.edu>, linux-ext4 <linux-ext4@vger.kernel.org>
Subject: Re: ext4-lazy (SMR-optimizations) landing to kernel?
Date: Mon, 10 Apr 2017 20:23:34 -0700 [thread overview]
Message-ID: <20170411032334.GA5066@birch.djwong.org> (raw)
In-Reply-To: <6B0F0C59-6930-41B3-8EE4-EA5BEECEB9F9@dilger.ca>
On Mon, Apr 10, 2017 at 09:06:23PM -0600, Andreas Dilger wrote:
> Hi Ted,
> now that FAST'17 is behind us, is there any plan to land the ext4-lazy code
> (SMR optimizations) to the upstream kernel? This looks like it improves
> some workloads even without SMR disks, and doesn't have any noticeable
> overhead for other workloads.
>
> I'd guess the one thing that we might want to do is still allow the journal
> to optionally checkpoint the metadata to the filesystem in the background,
> when the filesystem is otherwise idle, so that in case of journal loss for
> some reason the whole filesystem is not lost?
Don't forget to fix jbd2_bh_submit_read to behave when JBD2_FLAG_ESCAPE
is set on a journal data block.
--D
>
> Cheers, Andreas
>
>
>
>
>
next prev parent reply other threads:[~2017-04-11 3:23 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-11 3:06 ext4-lazy (SMR-optimizations) landing to kernel? Andreas Dilger
2017-04-11 3:23 ` Darrick J. Wong [this message]
2017-04-17 14:18 ` Eric Sandeen
2017-04-17 19:59 ` Andreas Dilger
2017-04-18 3:28 ` Theodore Ts'o
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