linux-kernel - Re: [V9fs-developer] [PATCH] fs: 9p: add generic splice

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Date:   Tue, 01 Dec 2020 21:37:15 +0100
From:   Toke Høiland-Jørgensen <toke@...hat.com>
To:     Dominique Martinet <asmadeus@...ewreck.org>
Cc:     Eric Van Hensbergen <ericvh@...il.com>,
        Latchesar Ionkov <lucho@...kov.net>,
        linux-kernel@...r.kernel.org, v9fs-developer@...ts.sourceforge.net
Subject: Re: [V9fs-developer] [PATCH] fs: 9p: add generic splice_read file
 operations

Dominique Martinet <asmadeus@...ewreck.org> writes:

> Toke Høiland-Jørgensen wrote on Tue, Dec 01, 2020:
>> > This made me test copy_file_range, and it works with both as well (used
>> > not to)
>> >
>> > interestingly on older kernels this came as default somehow? I have
>> > splice working on 5.4.67 :/ so this broke somewhat recently...
>> 
>> Huh, no idea; this is my first time digging into filesystem code, I
>> normally do networking and BPF :)
>
> In case anyone else wants to know, this broke in 5.10-rc1 with
> 36e2c7421f02 ("fs: don't allow splice read/write without explicit ops")
>
> So really a recent regression, good catch :)

Thanks - and what a lucky coincidence that I happened upon this now so
it can be fixed before 5.10-final :)

-Toke