linux-ext4 - Re: readahead patches

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Message-ID: <20170228154039.svqp7spwlvsthifa@thunk.org>
Date:   Tue, 28 Feb 2017 10:40:39 -0500
From:   Theodore Ts'o <tytso@....edu>
To:     Alexey Lyashkov <alexey.lyashkov@...il.com>
Cc:     linux-ext4@...r.kernel.org,
        Artem Blagodarenko <artem.blagodarenko@...il.com>
Subject: Re: readahead patches

On Sun, Feb 26, 2017 at 10:01:45PM +0300, Alexey Lyashkov wrote:
> Hi Theodore,
> 
> May i ask you to review an Artem patches against ext4 and e2fsprogs submitted with subject 
> [PATCH] ext4: preload block group descriptors and [PATCH] libext2fs: readahead for meta_bg ?
> 
> These patches dramatically decrease a mount / openfs time. 300T
> volume with meta_bg enabled have a mount() over 300s and debugfs -c
> -R stat was executed over 600s without these patches. With these
> patches mount time decreased to 20s, and debugfs to 12s.

They're on my todo list.  At the moment I'm focusing on bug fixes more
than I am patches that would go into the next merge window, but I have
noted those patches, will look at them once I have a chance.

Cheers,

						- Ted