linux-kernel - Re: problems with splice from /proc (was Linux 5.10-rc1)

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Message-ID: <20201027080745.GA31045@infradead.org>
Date:   Tue, 27 Oct 2020 08:07:45 +0000
From:   Christoph Hellwig <hch@...radead.org>
To:     Greg KH <gregkh@...uxfoundation.org>
Cc:     Christoph Hellwig <hch@...radead.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Al Viro <viro@...iv.linux.org.uk>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: problems with splice from /proc (was Linux 5.10-rc1)

On Tue, Oct 27, 2020 at 08:55:41AM +0100, Greg KH wrote:
> This is just a test, part of the bionic test suite to verify that bionic
> is working properly, and is run on new kernels as a verification that
> nothing functional broke in the kernel update.
> 
> I don't know about "real applications" yet.
> 
> Do you have to implement this on a per-proc-file-basis, or will it work
> for the whole filesystem?
> 
> And are the patches public anywhere that I could test them out?

This all branch has the last posted version:

http://git.infradead.org/users/hch/misc.git/shortlog/refs/heads/set_fs-rw.2

with tthe proc:, sysctl: and seq_file: patches related to it.  It did
switch over all seq_file instances, but non-seq_file instances and write
operations will need manual per-instance work.