From: Rik van Riel <riel@redhat.com>
To: Oleg Nesterov <oleg@redhat.com>
Cc: linux-kernel@vger.kernel.org, mingo@redhat.com, hpa@zytor.com,
matt.fleming@intel.com, bp@suse.de, pbonzini@redhat.com,
tglx@linutronix.de, luto@amacapital.net
Subject: Re: [RFC PATCH 04/11] x86,fpu: defer FPU restore until return to userspace
Date: Tue, 13 Jan 2015 15:06:04 -0500 [thread overview]
Message-ID: <54B57AAC.6020903@redhat.com> (raw)
In-Reply-To: <20150113183003.GB30475@redhat.com>
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
On 01/13/2015 01:30 PM, Oleg Nesterov wrote:
> On 01/13, Oleg Nesterov wrote:
>>
>> But yes, I think we need the per-cpu "in_kernel_fpu" and
>> irq_fpu_usable() must die. Please look at
>> http://marc.info/?l=linux-kernel&m=14096628660929
This link does not work for me. I wonder if that email is not
on the marc.info node I managed to send my http request to...
> Plus I think we need this to fix the race with
> math_state_restore()... Please see
> http://marc.info/?l=linux-kernel&m=140992479607206
>
> Unfortunately I forgot other problems I found in this area... And I
> completely forgot the plan I had in mind ;)
That I can certainly merge into my series.
- --
All rights reversed
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1
iQEcBAEBAgAGBQJUtXqsAAoJEM553pKExN6DESsH/iVrj6VEpV1gqyxB7T0cC0wr
UWjPP5OyV2JRkOronbl1iA9YMhN5WUfhvdWph4nauL0nR+IOip2qRqCmQN6NG4yj
A9u3NTDzKpXCBaBf+Ub5yPBv/QESvGomxUQmEYYdgxW6OfZtp0apouSPIhCAwWMq
XPKVXyjl0AH30+tV9oMnhhnXuwdG+ojNDFK8xeMG15gBPP8LncVYkmlgTeD4Kzca
VPw83KxFqNekEA7TPboBkjqDEfckT8tTsutlOMWmBnyI51duuMX3qc4xoJfCdmNB
+f8TYL0Y/7RKF2RS9qDXZRk1fakQHbzCaswpRIs7522zj49tkrGi4AFmUaOZ+0k=
=7eRE
-----END PGP SIGNATURE-----
next prev parent reply other threads:[~2015-01-13 20:06 UTC|newest]
Thread overview: 76+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-11 21:46 [RFC PATCH 0/11 BROKEN] move FPU context loading to userspace switch riel
2015-01-11 21:46 ` [RFC PATCH 01/11] x86,fpu: document the data structures a little riel
2015-01-12 21:18 ` Borislav Petkov
2015-01-12 21:38 ` Rik van Riel
2015-01-12 21:52 ` Dave Hansen
2015-01-13 15:59 ` Rik van Riel
2015-01-11 21:46 ` [RFC PATCH 02/11] x86,fpu: replace fpu_switch_t with a thread flag riel
2015-01-13 15:24 ` Oleg Nesterov
2015-01-13 16:35 ` Rik van Riel
2015-01-13 16:55 ` Oleg Nesterov
2015-01-11 21:46 ` [RFC PATCH 03/11] x86,fpu: move __thread_fpu_begin to when the task has the fpu riel
2015-01-13 15:24 ` Oleg Nesterov
2015-01-13 16:37 ` Rik van Riel
2015-01-11 21:46 ` [RFC PATCH 04/11] x86,fpu: defer FPU restore until return to userspace riel
2015-01-13 15:53 ` Oleg Nesterov
2015-01-13 17:07 ` Andy Lutomirski
2015-01-13 17:11 ` Oleg Nesterov
2015-01-13 17:18 ` Andy Lutomirski
2015-01-13 17:44 ` Rik van Riel
2015-01-13 17:57 ` Andy Lutomirski
2015-01-13 18:13 ` Rik van Riel
2015-01-13 18:26 ` Andy Lutomirski
2015-01-13 17:54 ` Rik van Riel
2015-01-13 18:22 ` Oleg Nesterov
2015-01-13 18:30 ` Oleg Nesterov
2015-01-13 20:06 ` Rik van Riel [this message]
2015-01-14 17:56 ` Oleg Nesterov
2015-01-13 17:58 ` Oleg Nesterov
2015-01-13 19:32 ` Rik van Riel
2015-01-11 21:46 ` [RFC PATCH 05/11] x86,fpu: ensure FPU state is reloaded from memory if task is traced riel
2015-01-13 16:19 ` Oleg Nesterov
2015-01-13 16:33 ` Rik van Riel
2015-01-13 16:50 ` Oleg Nesterov
2015-01-13 16:57 ` Rik van Riel
2015-01-11 21:46 ` [RFC PATCH 06/11] x86,fpu: lazily skip fpu restore with eager fpu mode, too riel
2015-01-13 17:11 ` Andy Lutomirski
2015-01-13 20:43 ` Rik van Riel
2015-01-14 18:36 ` Oleg Nesterov
2015-01-15 2:49 ` Rik van Riel
2015-01-15 19:34 ` Oleg Nesterov
2015-01-11 21:46 ` [RFC PATCH 07/11] x86,fpu: store current fpu pointer, instead of fpu_owner_task riel
2015-01-11 21:46 ` [RFC PATCH 08/11] x86,fpu: restore user FPU state lazily after __kernel_fpu_end riel
2015-01-14 18:43 ` Oleg Nesterov
2015-01-14 19:08 ` Oleg Nesterov
2015-01-11 21:46 ` [RFC PATCH 09/11] x86,fpu,kvm: keep vcpu FPU active as long as it is resident riel
2015-01-11 21:46 ` [RFC PATCH 10/11] x86,fpu: fix fpu_copy to deal with not-loaded fpu riel
2015-01-11 21:46 ` [RFC PATCH 11/11] (BROKEN) x86,fpu: broken signal handler stack setup riel
2015-01-15 19:19 ` [PATCH 0/3] x86, fpu: kernel_fpu_begin/end initial cleanups/fix Oleg Nesterov
2015-01-15 19:19 ` [PATCH 1/3] x86, fpu: introduce per-cpu "bool in_kernel_fpu" Oleg Nesterov
2015-01-16 2:22 ` Rik van Riel
2015-01-20 12:54 ` [tip:x86/fpu] x86, fpu: Introduce per-cpu in_kernel_fpu state tip-bot for Oleg Nesterov
2015-01-15 19:20 ` [PATCH 2/3] x86, fpu: don't abuse ->has_fpu in __kernel_fpu_{begin,end}() Oleg Nesterov
2015-01-16 2:27 ` Rik van Riel
2015-01-16 15:54 ` Oleg Nesterov
2015-01-16 16:07 ` Rik van Riel
2015-01-20 12:55 ` [tip:x86/fpu] x86, fpu: Don't abuse has_fpu in __kernel_fpu_begin /end() tip-bot for Oleg Nesterov
2015-01-15 19:20 ` [PATCH 3/3] x86, fpu: fix math_state_restore() race with kernel_fpu_begin() Oleg Nesterov
2015-01-16 2:30 ` Rik van Riel
2015-01-16 16:03 ` Oleg Nesterov
2015-01-20 12:55 ` [tip:x86/fpu] x86, fpu: Fix " tip-bot for Oleg Nesterov
2015-01-19 18:51 ` [PATCH 0/3] x86, fpu: more eagerfpu cleanups Oleg Nesterov
2015-01-19 18:51 ` [PATCH 1/3] x86, fpu: __kernel_fpu_begin() should clear fpu_owner_task even if use_eager_fpu() Oleg Nesterov
2015-01-20 14:15 ` Rik van Riel
2015-02-20 18:13 ` Borislav Petkov
2015-03-03 11:27 ` [tip:x86/fpu] x86/fpu: " tip-bot for Oleg Nesterov
2015-01-19 18:51 ` [PATCH 2/3] x86, fpu: always allow FPU in interrupt " Oleg Nesterov
2015-01-20 14:46 ` Rik van Riel
2015-01-20 22:46 ` Andy Lutomirski
2015-02-20 21:48 ` Borislav Petkov
2015-03-03 11:28 ` [tip:x86/fpu] x86/fpu: Always " tip-bot for Oleg Nesterov
2015-01-19 18:52 ` [PATCH 3/3] x86, fpu: don't abuse FPU in kernel threads " Oleg Nesterov
2015-01-20 14:53 ` Rik van Riel
2015-02-23 15:31 ` Borislav Petkov
2015-03-03 11:28 ` [tip:x86/fpu] x86/fpu: Don' t " tip-bot for Oleg Nesterov
2015-02-20 12:10 ` [PATCH 0/3] x86, fpu: more eagerfpu cleanups Borislav Petkov
2015-02-20 13:30 ` Oleg Nesterov
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=54B57AAC.6020903@redhat.com \
--to=riel@redhat.com \
--cc=bp@suse.de \
--cc=hpa@zytor.com \
--cc=linux-kernel@vger.kernel.org \
--cc=luto@amacapital.net \
--cc=matt.fleming@intel.com \
--cc=mingo@redhat.com \
--cc=oleg@redhat.com \
--cc=pbonzini@redhat.com \
--cc=tglx@linutronix.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.