# Re: readahead patches

- From: Theodore Ts'o \<tytso@mit.edu\>
- Date: 2017-02-28 16:06:32 
- List: linux-ext4
- Page: https://ratatoskr.run/linux-ext4/2017/02/13428609
- Thread: https://ratatoskr.run/linux-ext4/2017/02/13428609/t.md

```text
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
```