linux-ext4 - Re: [PATCH] lib/ext2fs: Validity checks for ext2fs_inode_scan_goto

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Message-ID: <CA+ASDXPYufpx0uaC7iyo_cgaa_2XdR+OLBvMDKk=rpwJe1hWXQ@mail.gmail.com>
Date: Fri, 1 Dec 2023 09:30:38 -0800
From: Brian Norris <briannorris@...omium.org>
To: "Darrick J. Wong" <djwong@...nel.org>
Cc: "Theodore Ts'o" <tytso@....edu>, linux-ext4@...r.kernel.org
Subject: Re: [PATCH] lib/ext2fs: Validity checks for ext2fs_inode_scan_goto_blockgroup()

On Fri, Dec 1, 2023 at 8:24 AM Darrick J. Wong <djwong@...nel.org> wrote:
> On Thu, Nov 30, 2023 at 04:01:18PM -0800, Brian Norris wrote:
> > This resolves issues seen in ureadahead, when it uses an old packfile
> > (with mismatching group indices) with a new filesystem.
>
> Say what now?  The boot time pre-caching thing Ubuntu used to have?
> https://manpages.ubuntu.com/manpages/trusty/man8/ureadahead.8.html

Sure. ChromeOS still uses it. Steven Rostedt even bothered to do a
talk about it recently:
https://eoss2023.sched.com/event/1LcMw/the-resurrection-of-ureadahead-and-speeding-up-the-boot-process-and-preloading-applications-steven-rostedt-google

Brian