From: Linus Torvalds <torvalds@linux-foundation.org>
To: Florian Weimer <fweimer@redhat.com>
Cc: "Jason A. Donenfeld" <Jason@zx2c4.com>,
Andy Lutomirski <luto@kernel.org>, Ingo Molnar <mingo@kernel.org>,
linux-kernel@vger.kernel.org, patches@lists.linux.dev,
tglx@linutronix.de, linux-crypto@vger.kernel.org,
linux-api@vger.kernel.org, x86@kernel.org,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Adhemerval Zanella Netto <adhemerval.zanella@linaro.org>,
"Carlos O'Donell" <carlos@redhat.com>,
Arnd Bergmann <arnd@arndb.de>, Jann Horn <jannh@google.com>,
Christian Brauner <brauner@kernel.org>,
linux-mm@kvack.org, mlichvar@redhat.com
Subject: Re: [PATCH v14 2/7] mm: add VM_DROPPABLE for designating always lazily freeable mappings
Date: Mon, 9 Jan 2023 08:28:58 -0600 [thread overview]
Message-ID: <CAHk-=wg7vMC2VmSBdVw7EKV+7UDiftQEg3L+3Rc0rcjjfsvs5A@mail.gmail.com> (raw)
In-Reply-To: <874jt0kndq.fsf@oldenburg.str.redhat.com>
On Mon, Jan 9, 2023 at 4:34 AM Florian Weimer <fweimer@redhat.com> wrote:
>
> We did these changes on the glibc side because Jason sounded very
> confident that he's able to deliver vDSO acceleration for getrandom. If
> that fails to materialize, we'll just have to add back userspace
> buffering in glibc.
My whole argument has been that user-space buffering is the sane thing
to do. Most definitely for something like glibc.
The number of people who go "oh, no, my buffer or randomness could be
exposed by insert-odd-situation-here" is approximately zero, and then
the onus should be on *them* to do something special.
Because *they* are special. Precious little snowflake special.
Linus
next prev parent reply other threads:[~2023-01-09 14:34 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-01 16:29 [PATCH v14 0/7] implement getrandom() in vDSO Jason A. Donenfeld
2023-01-01 16:29 ` [PATCH v14 1/7] x86: lib: Separate instruction decoder MMIO type from MMIO trace Jason A. Donenfeld
2023-01-03 10:32 ` Ingo Molnar
2023-01-03 14:51 ` Jason A. Donenfeld
2023-01-03 17:00 ` Ingo Molnar
2023-01-03 17:29 ` Borislav Petkov
2023-01-03 17:30 ` Jason A. Donenfeld
2023-01-03 17:47 ` Ingo Molnar
2023-01-03 17:48 ` Jason A. Donenfeld
2023-01-04 20:25 ` Ingo Molnar
2023-01-04 20:29 ` Jason A. Donenfeld
2023-01-03 11:00 ` [tip: x86/asm] x86/insn: Avoid namespace clash by separating instruction decoder MMIO type from MMIO trace type tip-bot2 for Jason A. Donenfeld
2023-01-03 17:53 ` [tip: x86/urgent] " tip-bot2 for Jason A. Donenfeld
2023-01-01 16:29 ` [PATCH v14 2/7] mm: add VM_DROPPABLE for designating always lazily freeable mappings Jason A. Donenfeld
2023-01-03 10:50 ` Ingo Molnar
2023-01-03 15:01 ` Jason A. Donenfeld
2023-01-03 18:15 ` Ingo Molnar
2023-01-03 18:51 ` Jason A. Donenfeld
2023-01-03 18:36 ` Andy Lutomirski
2023-01-03 19:05 ` Jason A. Donenfeld
2023-01-03 20:52 ` Andy Lutomirski
2023-01-03 19:19 ` Linus Torvalds
2023-01-03 19:35 ` Jason A. Donenfeld
2023-01-03 19:54 ` Linus Torvalds
2023-01-03 20:03 ` Jason A. Donenfeld
2023-01-03 20:15 ` Linus Torvalds
2023-01-03 20:25 ` Linus Torvalds
2023-01-03 20:44 ` Jason A. Donenfeld
2023-01-05 21:57 ` Yann Droneaud
2023-01-05 22:57 ` Jason A. Donenfeld
2023-01-06 1:02 ` Linus Torvalds
2023-01-06 2:08 ` Linus Torvalds
2023-01-06 2:42 ` Jason A. Donenfeld
2023-01-06 20:53 ` Andy Lutomirski
2023-01-06 21:10 ` Linus Torvalds
2023-01-10 11:01 ` Dr. Greg
2023-01-06 21:36 ` Jason A. Donenfeld
2023-01-06 21:42 ` Matthew Wilcox
2023-01-06 22:06 ` Linus Torvalds
2023-01-06 2:14 ` Jason A. Donenfeld
2023-01-09 10:34 ` Florian Weimer
2023-01-09 14:28 ` Linus Torvalds [this message]
2023-01-11 7:27 ` Eric Biggers
2023-01-11 12:07 ` Linus Torvalds
2023-01-01 16:29 ` [PATCH v14 3/7] x86: mm: Skip faulting instruction for VM_DROPPABLE faults Jason A. Donenfeld
2023-01-01 16:29 ` [PATCH v14 4/7] random: add vgetrandom_alloc() syscall Jason A. Donenfeld
2023-01-01 16:29 ` [PATCH v14 5/7] arch: allocate vgetrandom_alloc() syscall number Jason A. Donenfeld
2023-01-01 16:29 ` [PATCH v14 6/7] random: introduce generic vDSO getrandom() implementation Jason A. Donenfeld
2023-01-01 16:29 ` [PATCH v14 7/7] x86: vdso: Wire up getrandom() vDSO implementation Jason A. Donenfeld
2023-01-12 17:27 ` Christophe Leroy
2023-01-12 17:49 ` Jason A. Donenfeld
2023-01-11 22:23 ` [PATCH v14 0/7] implement getrandom() in vDSO Mathieu Desnoyers
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