From: Oleg Nesterov <[email protected]>
To: Thomas Gleixner <[email protected]>
Cc: Jens Axboe <[email protected]>,
[email protected], [email protected],
[email protected]
Subject: Re: [PATCH 3/5] kernel: add support for TIF_NOTIFY_SIGNAL
Date: Thu, 15 Oct 2020 17:27:08 +0200 [thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
On 10/15, Thomas Gleixner wrote:
>
> On Thu, Oct 15 2020 at 16:37, Oleg Nesterov wrote:
> > On 10/15, Jens Axboe wrote:
> >> On 10/15/20 8:31 AM, Oleg Nesterov wrote:
> >> > I don't understand why does this version requires CONFIG_GENERIC_ENTRY.
> >> >
> >> > Afaics, it is very easy to change all the non-x86 arches to support
> >> > TIF_NOTIFY_SIGNAL, but it is not trivial to change them all to use
> >> > kernel/entry/common.c ?
> >>
> >> I think that Thomas wants to gate TIF_NOTIFY_SIGNAL on conversion to
> >> the generic entry code?
> >
> > Then I think TIF_NOTIFY_SIGNAL will be never fully supported ;)
>
> Yeah, we proliferate crap on that basis forever. _ALL_ architectures
> have the very same entry/exit ordering problems (or subsets and
> different ones) which we fixed on x86.
>
> So no, we don't want to have 24 different variants of the same thing
> again. That's what common code is for.
>
> Not doing that is making the life of everyone working on core
> infrastructure pointlessly harder. Architecture people still have enough
> ways to screw everyone up.
Sure, it would be nice to change them all to use kernel/entry/common.c.
Until then (until never), how can we kill JOBCTL_TASK_WORK ?
How can we remove freezing/klp_patch_pending from recalc_sigpending() ?
Oleg.
next prev parent reply other threads:[~2020-10-15 15:27 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-15 13:16 [PATCHSET v5] Add support for TIF_NOTIFY_SIGNAL Jens Axboe
2020-10-15 13:16 ` [PATCH 1/5] tracehook: clear TIF_NOTIFY_RESUME in tracehook_notify_resume() Jens Axboe
2020-10-15 14:42 ` Oleg Nesterov
2020-10-15 14:43 ` Jens Axboe
2020-10-15 13:16 ` [PATCH 2/5] kernel: add task_sigpending() helper Jens Axboe
2020-10-15 14:42 ` Oleg Nesterov
2020-10-15 13:16 ` [PATCH 3/5] kernel: add support for TIF_NOTIFY_SIGNAL Jens Axboe
2020-10-15 14:31 ` Oleg Nesterov
2020-10-15 14:33 ` Jens Axboe
2020-10-15 14:37 ` Oleg Nesterov
2020-10-15 14:43 ` Jens Axboe
2020-10-15 14:47 ` Oleg Nesterov
2020-10-15 14:53 ` Oleg Nesterov
2020-10-15 14:56 ` Jens Axboe
2020-10-15 15:01 ` Thomas Gleixner
2020-10-15 15:27 ` Oleg Nesterov [this message]
2020-10-15 14:44 ` Oleg Nesterov
2020-10-15 13:17 ` [PATCH 4/5] x86: wire up TIF_NOTIFY_SIGNAL Jens Axboe
2020-10-15 14:11 ` Thomas Gleixner
2020-10-15 14:31 ` Jens Axboe
2020-10-15 14:34 ` Thomas Gleixner
2020-10-15 14:35 ` Jens Axboe
2020-10-15 14:36 ` Oleg Nesterov
2020-10-15 14:42 ` Jens Axboe
2020-10-15 14:34 ` Oleg Nesterov
2020-10-15 14:54 ` Thomas Gleixner
2020-10-15 15:17 ` Oleg Nesterov
2020-10-16 9:55 ` Thomas Gleixner
2020-10-16 10:54 ` Oleg Nesterov
2020-10-16 13:07 ` Thomas Gleixner
2020-10-15 14:44 ` Oleg Nesterov
2020-10-20 10:57 ` introduce asm-generic/thread_info.h ? Oleg Nesterov
2020-10-15 13:17 ` [PATCH 5/5] task_work: use TIF_NOTIFY_SIGNAL if available Jens Axboe
2020-10-15 15:49 ` Oleg Nesterov
2020-10-15 18:39 ` Jens Axboe
2020-10-16 9:00 ` Thomas Gleixner
2020-10-16 9:39 ` Thomas Gleixner
2020-10-16 13:35 ` Jens Axboe
2020-10-16 14:17 ` Thomas Gleixner
2020-10-16 14:51 ` Oleg Nesterov
2020-10-16 14:53 ` Jens Axboe
2020-10-16 18:03 ` Thomas Gleixner
2020-10-16 18:05 ` Jens Axboe
2020-10-16 13:33 ` Jens Axboe
2020-10-16 14:11 ` Thomas Gleixner
2020-10-16 14:22 ` Jens Axboe
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