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Date:   Tue, 2 Apr 2019 08:46:32 +1100
From:   Dave Chinner <>
To:     "Darrick J. Wong" <>
Cc:     linux-fsdevel <>,
        linux-ext4 <>,
        xfs <>
Subject: Re: [PATCH] bootfs: simple bootloader filesystem

On Mon, Apr 01, 2019 at 12:00:01AM -0700, Darrick J. Wong wrote:
> From: Darrick J. Wong <>
> Does your computer use a bootloader which arrogantly declares that it can
> read boot files off a filesystem but isn't sophisticated enough even to
> recognize when that filesystem needs journal recovery?
> Does your system software deployment program foolishly omit system calls
> to flush newly unwrapped packages to disk?  Do you sometimes wonder if
> they've forgotten that old maxim, "wait for the disk drive light to turn
> off /before/ you power down"?
> Are your computer operators aggressively derpy?  Do they have a habit of
> leaving disk cables on the floor so they can trip over them twenty times
> a day?  Does this leave you with sad files full of zeroes?
> If so, bootfs is for you!  This new filesystem type uses journalling to
> ensure metadata integrity, but forces all writes and directory tree
> updates to be synchronous, fsyncs files on close, and checkpoints its
> journal whenever a synchronization event happens.  Some allege this is
> very slow, but I've been able to max out the iops on both of my double
> height floppy drives!  In a power-cycling stress test, I found that the
> switch broke off in my hand before I lost any data.  This concept may
> sound terrible, but like any good crutch, it _is_ made of wood!
> Singed-off-by: Darrick J. Wong <>

Ooooo - such a hot topic! Finally bootfs is more than just
we-really-should-do-this conference talk!

Looks good to me - with this we can finally move on from LILO....

Acked-by: Dave Chinner <>

FWIW, Should this have a cc: tag on
it so it gets out into distro-world ASAP?


Dave Chinner

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