From: Al Viro <viro@ZenIV.linux.org.uk>
To: Andy Lutomirski <luto@amacapital.net>
Cc: NeilBrown <neilb@suse.com>, Peter Zijlstra <peterz@infradead.org>,
Dmitry Safonov <dsafonov@virtuozzo.com>,
Andrew Lutomirski <luto@kernel.org>,
"H. Peter Anvin" <hpa@zytor.com>,
Denys Vlasenko <dvlasenk@redhat.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
Borislav Petkov <bp@alien8.de>, Ingo Molnar <mingo@kernel.org>,
Brian Gerst <brgerst@gmail.com>,
LKML <linux-kernel@vger.kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
linux-tip-commits@vger.kernel.org, jsimmons@infradead.org
Subject: Re: in_compat_syscall() returns from kernel thread for X86_32.
Date: Thu, 18 Oct 2018 03:49:43 +0100 [thread overview]
Message-ID: <20181018024943.GD32577@ZenIV.linux.org.uk> (raw)
In-Reply-To: <CALCETrXB8PE4Ue0BeD0wUS9psLLjpv_pt+nj=SEaj+Nb_dZzUA@mail.gmail.com>
On Wed, Oct 17, 2018 at 07:37:42PM -0700, Andy Lutomirski wrote:
> I could get on board with:
>
> ({WARN_ON_ONCE(current->flags & PF_KTHREAD); true})
>
> The point of these accessors is to be used *in a syscall*.
>
> What on Earth is Lustre doing that makes it have this problem?
Plays with timestamps from a kernel thread, perhaps?
See the old .su joke about adenoidectomy with rectal access
for possible reasons for doing it that way...
next prev parent reply other threads:[~2018-10-18 2:51 UTC|newest]
Thread overview: 94+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-04-11 15:22 [PATCH] x86/vdso: add mremap hook to vm_special_mapping Dmitry Safonov
2016-04-11 15:22 ` Dmitry Safonov
2016-04-11 15:41 ` kbuild test robot
2016-04-11 15:41 ` kbuild test robot
2016-04-11 15:54 ` Dmitry Safonov
2016-04-11 15:54 ` Dmitry Safonov
2016-04-14 16:32 ` [PATCHv2] " Dmitry Safonov
2016-04-14 16:32 ` Dmitry Safonov
2016-04-14 22:58 ` Andy Lutomirski
2016-04-14 22:58 ` Andy Lutomirski
2016-04-15 8:46 ` Dmitry Safonov
2016-04-15 8:46 ` Dmitry Safonov
2016-04-15 9:18 ` Ingo Molnar
2016-04-15 9:18 ` Ingo Molnar
2016-04-15 9:51 ` Dmitry Safonov
2016-04-15 9:51 ` Dmitry Safonov
2016-04-15 12:08 ` Dmitry Safonov
2016-04-15 12:08 ` Dmitry Safonov
2016-04-15 13:20 ` [PATCHv3 1/2] " Dmitry Safonov
2016-04-15 13:20 ` Dmitry Safonov
2016-04-15 13:20 ` [PATCHv3 2/2] x86: rename is_{ia32,x32}_task to in_{ia32,x32}_syscall Dmitry Safonov
2016-04-15 13:20 ` Dmitry Safonov
2016-04-15 16:52 ` Andy Lutomirski
2016-04-15 16:52 ` Andy Lutomirski
2016-04-15 16:55 ` Dmitry Safonov
2016-04-15 16:55 ` Dmitry Safonov
2016-04-15 13:53 ` [PATCHv3 1/2] x86/vdso: add mremap hook to vm_special_mapping kbuild test robot
2016-04-15 13:53 ` kbuild test robot
2016-04-15 14:12 ` [PATCHv4 " Dmitry Safonov
2016-04-15 14:12 ` Dmitry Safonov
2016-04-15 14:12 ` [PATCHv4 2/2] x86: rename is_{ia32,x32}_task to in_{ia32,x32}_syscall Dmitry Safonov
2016-04-15 14:12 ` Dmitry Safonov
2016-04-15 16:58 ` [PATCHv4 1/2] x86/vdso: add mremap hook to vm_special_mapping Andy Lutomirski
2016-04-15 16:58 ` Andy Lutomirski
2016-04-18 11:18 ` Dmitry Safonov
2016-04-18 11:18 ` Dmitry Safonov
2016-04-18 15:37 ` Andy Lutomirski
2016-04-18 15:37 ` Andy Lutomirski
2016-04-18 13:43 ` [PATCHv5 1/3] x86: rename is_{ia32,x32}_task to in_{ia32,x32}_syscall Dmitry Safonov
2016-04-18 13:43 ` Dmitry Safonov
2016-04-18 13:43 ` [PATCHv5 2/3] x86/vdso: add mremap hook to vm_special_mapping Dmitry Safonov
2016-04-18 13:43 ` Dmitry Safonov
2016-04-18 14:03 ` kbuild test robot
2016-04-18 14:03 ` kbuild test robot
2016-04-18 14:17 ` [PATCHv6 " Dmitry Safonov
2016-04-18 14:17 ` Dmitry Safonov
2016-04-18 14:23 ` [PATCHv7 " Dmitry Safonov
2016-04-18 14:23 ` Dmitry Safonov
2016-04-20 16:22 ` Dmitry Safonov
2016-04-20 16:22 ` Dmitry Safonov
2016-04-21 19:52 ` Andy Lutomirski
2016-04-21 19:52 ` Andy Lutomirski
2016-04-22 10:45 ` Dmitry Safonov
2016-04-22 10:45 ` Dmitry Safonov
2016-04-23 23:09 ` [PATCHv5 " kbuild test robot
2016-04-23 23:09 ` kbuild test robot
2016-04-18 13:43 ` [PATCHv5 3/3] selftest/x86: add mremap vdso 32-bit test Dmitry Safonov
2016-04-18 13:43 ` Dmitry Safonov
2016-04-21 20:01 ` Andy Lutomirski
2016-04-21 20:01 ` Andy Lutomirski
2016-04-22 11:34 ` Dmitry Safonov
2016-04-22 11:34 ` Dmitry Safonov
2016-04-19 9:34 ` [tip:x86/asm] x86/entry: Rename is_{ia32,x32}_task() to in_{ia32,x32}_syscall() tip-bot for Dmitry Safonov
2016-04-19 11:15 ` Ingo Molnar
2016-04-19 11:35 ` Borislav Petkov
2016-04-19 17:00 ` H. Peter Anvin
2016-04-19 16:04 ` Andy Lutomirski
2016-04-22 8:36 ` Ingo Molnar
2018-10-18 1:47 ` in_compat_syscall() returns from kernel thread for X86_32 NeilBrown
2018-10-18 2:37 ` Andy Lutomirski
2018-10-18 2:49 ` Al Viro [this message]
2018-10-18 4:36 ` NeilBrown
2018-10-18 17:26 ` Andy Lutomirski
2018-10-20 6:02 ` Andreas Dilger
2018-10-20 7:58 ` Andy Lutomirski
2018-10-24 1:47 ` NeilBrown
2018-10-24 13:15 ` Theodore Y. Ts'o
2018-10-24 14:32 ` Theodore Y. Ts'o
2019-01-11 22:21 ` Pavel Machek
2018-10-25 3:46 ` NeilBrown
2018-10-25 4:45 ` Andy Lutomirski
2016-04-25 11:37 ` [PATCHv8 1/2] x86/vdso: add mremap hook to vm_special_mapping Dmitry Safonov
2016-04-25 11:37 ` Dmitry Safonov
2016-04-25 11:37 ` [PATCHv8 2/2] selftest/x86: add mremap vdso test Dmitry Safonov
2016-04-25 11:37 ` Dmitry Safonov
2016-04-25 21:39 ` Andy Lutomirski
2016-04-25 21:39 ` Andy Lutomirski
2016-04-25 21:38 ` [PATCHv8 1/2] x86/vdso: add mremap hook to vm_special_mapping Andy Lutomirski
2016-04-25 21:38 ` Andy Lutomirski
2016-05-05 11:09 ` Dmitry Safonov
2016-05-05 11:52 ` Ingo Molnar
2016-05-05 11:52 ` Ingo Molnar
2016-05-05 11:55 ` Dmitry Safonov
2016-05-05 11:55 ` Dmitry Safonov
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