linux-kernel - Re: [PATCH 2/2] fs: cache the string generated by reading /proc/filesystems

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Message-ID: <CAGudoHF2RbaEAUYcWBZCo=4KvRroEcotAjtZEnoTG1qTYA5+eg@mail.gmail.com>
Date: Sat, 5 Apr 2025 06:55:33 +0200
From: Mateusz Guzik <mjguzik@...il.com>
To: Christoph Hellwig <hch@...radead.org>
Cc: Andreas Schwab <schwab@...ux-m68k.org>, brauner@...nel.org, viro@...iv.linux.org.uk, 
	jack@...e.cz, linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org
Subject: Re: [PATCH 2/2] fs: cache the string generated by reading /proc/filesystems

On Fri, Apr 4, 2025 at 10:41 AM Christoph Hellwig <hch@...radead.org> wrote:
>
> On Sat, Mar 29, 2025 at 09:53:16PM +0100, Andreas Schwab wrote:
> > On Mär 29 2025, Mateusz Guzik wrote:
> >
> > > It is being read surprisingly often (e.g., by mkdir, ls and even sed!).
> >
> > It is part of libselinux (selinuxfs_exits), called by its library
> > initializer.
>
> Can we please fix libselinux instead of working around this really
> broken behavior in the kernel?
>

That's a fair point, I'm going to ask them about it. If they fix it
then I'll probably self-NAK the patch.

-- 
Mateusz Guzik <mjguzik gmail.com>