From: "Jason A. Donenfeld" <Jason@zx2c4.com>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: 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>,
Florian Weimer <fweimer@redhat.com>,
Arnd Bergmann <arnd@arndb.de>, Jann Horn <jannh@google.com>,
Christian Brauner <brauner@kernel.org>,
linux-mm@kvack.org
Subject: Re: [PATCH v14 2/7] mm: add VM_DROPPABLE for designating always lazily freeable mappings
Date: Tue, 3 Jan 2023 21:44:47 +0100 [thread overview]
Message-ID: <Y7STv9+p248zr+0a@zx2c4.com> (raw)
In-Reply-To: <CAHk-=wi4gshfKjbhEO_xZdVb9ztXf0iuv5kKhxtvAHf2HzTmng@mail.gmail.com>
On Tue, Jan 03, 2023 at 12:15:57PM -0800, Linus Torvalds wrote:
> On Tue, Jan 3, 2023 at 12:03 PM Jason A. Donenfeld <Jason@zx2c4.com> wrote:
> >
> > That buffering cannot be done safely currently
>
> .. again, this is "your semantics" (the (b) in my humbug list), not
> necessarily reality for anybody else.
Yea that's fair. Except, of course, I maintain that my semantics are
important ones. :)
> I'm NAK'ing making invasive changes to the VM for something this
> specialized. I really believe that the people who have this issue are
> *so* few and far between that they can deal with the VM forking and
> reseeding issues quite well on their own.
Okay, that's fine. I'll see if I can make this work without having to do
surgery on mm and introduce a new VM_* flag and such. Hopefully I'll
succeed there.
Jason
next prev parent reply other threads:[~2023-01-03 20:45 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 [this message]
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
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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