linux-kernel - Re: [PATCH 1/2] fs/kernel_read_file: add support for duplicate detection

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Message-ID: <ZG6KueWpHnyPr6YV@bombadil.infradead.org>
Date:   Wed, 24 May 2023 15:07:53 -0700
From:   Luis Chamberlain <mcgrof@...nel.org>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     david@...hat.com, tglx@...utronix.de, hch@....de,
        patches@...ts.linux.dev, linux-modules@...r.kernel.org,
        linux-mm@...ck.org, linux-kernel@...r.kernel.org, pmladek@...e.com,
        petr.pavlu@...e.com, prarit@...hat.com, lennart@...ttering.net,
        gregkh@...uxfoundation.org, rafael@...nel.org, song@...nel.org,
        lucas.de.marchi@...il.com, lucas.demarchi@...el.com,
        christophe.leroy@...roup.eu, peterz@...radead.org, rppt@...nel.org,
        dave@...olabs.net, willy@...radead.org, vbabka@...e.cz,
        mhocko@...e.com, dave.hansen@...ux.intel.com,
        colin.i.king@...il.com, jim.cromie@...il.com,
        catalin.marinas@....com, jbaron@...mai.com,
        rick.p.edgecombe@...el.com, yujie.liu@...el.com
Subject: Re: [PATCH 1/2] fs/kernel_read_file: add support for duplicate
 detection

On Wed, May 24, 2023 at 02:56:47PM -0700, Linus Torvalds wrote:
> On Wed, May 24, 2023 at 2:52 PM Linus Torvalds
> <torvalds@...ux-foundation.org> wrote:
> >
> > Stop adding horrific code for some made-up load that isn't real.
> 
> Even if you trigger some "worst case 3x memory use", that is
> _temporary_, and will be free'd in the end.
> 
> The patches to "fix" this are worse than the disease.

Fine with me, we can punt back and wait and hope udev fixes this.
No one can tell me I didn't try. Now let's hope userspace will try
an alternative.

  Luis