[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <Y6IXWltScF2CI1v3@gmail.com>
Date: Tue, 20 Dec 2022 20:13:14 +0000
From: Eric Biggers <ebiggers@...nel.org>
To: Christophe Leroy <christophe.leroy@...roup.eu>
Cc: "Jason A. Donenfeld" <Jason@...c4.com>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"patches@...ts.linux.dev" <patches@...ts.linux.dev>,
"tglx@...utronix.de" <tglx@...utronix.de>,
"linux-crypto@...r.kernel.org" <linux-crypto@...r.kernel.org>,
"linux-api@...r.kernel.org" <linux-api@...r.kernel.org>,
"x86@...nel.org" <x86@...nel.org>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Adhemerval Zanella Netto <adhemerval.zanella@...aro.org>,
Carlos O'Donell <carlos@...hat.com>,
Florian Weimer <fweimer@...hat.com>,
Arnd Bergmann <arnd@...db.de>, Jann Horn <jannh@...gle.com>,
Christian Brauner <brauner@...nel.org>,
"linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>
Subject: Re: [PATCH v12 0/6] implement getrandom() in vDSO
On Tue, Dec 20, 2022 at 05:17:52PM +0000, Christophe Leroy wrote:
> Hi Jason,
>
> Le 12/12/2022 à 19:53, Jason A. Donenfeld a écrit :
> > Changes v11->v12:
> > ----------------
> > - In order to avoid mlock()ing pages, and the related rlimit and fork
> > inheritance issues there, Introduce VM_DROPPABLE to prevent swapping
> > while meeting the cache-like requirements of vDSO getrandom().
> >
> > This has some tenticles in mm/ and arch/x86/ code, so I've marked the
> > two patches for that as still RFC, while the rest of the series is not
> > RFC.
> >
> > - Mandate that opaque state blobs don't straddle page boundaries, so
> > that VM_DROPPABLE can work on page-level granularity rather than
> > allocation-level granularity.
> >
> > - Add compiler barriers to vDSO getrandom() to prevent theoretical
> > reordering potential.
> >
> > - Initialize the trials loop counter in the chacha test.
>
> I would have liked to give it a try on powerpc, but the series
> conflicts. I tried both on v6.1 and on linus/master from now:
>
Same here, I can't figure out how to apply this series.
It would help if people always used the --base option to git format-patch...
- Eric
Powered by blists - more mailing lists