linux-ext4 - Re: v4.7--v4.10+: ext4: repeatable inline-data oops (and fs corruption) caused by msync() of shared writable mmap (with recipe)

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Message-ID: <87a88nga4d.fsf@esperi.org.uk>
Date:   Tue, 14 Mar 2017 15:18:26 +0000
From:   Nick Alcock <nick.alcock@...cle.com>
To:     "Darrick J. Wong" <darrick.wong@...cle.com>
Cc:     Eric Biggers <ebiggers3@...il.com>, linux-ext4@...r.kernel.org,
        linux-fsdevel@...r.kernel.org
Subject: Re: v4.7--v4.10+: ext4: repeatable inline-data oops (and fs corruption) caused by msync() of shared writable mmap (with recipe)

On 13 Mar 2017, Darrick J. Wong told this:

> I wouldn't turn on inline_data for files, period.  It's not as well tested
> as it ought to be (clearly). :/

Bah, if I don't, how will it get tested? :) this machine is newly
commissioned and doesn't have much load or important content yet: it's
just the time to try experimental and potentially dangerous things :)

(I didn't know you could turn it on in any sense other than a 'big
hammer' for everything. I have a great many symlinks, and it's really
that I'm interested in reducing seeks for...)

-- 
NULL && (void)