From: Andy Lutomirski <luto@kernel.org>
To: Khalid Aziz <khalid.aziz@oracle.com>
Cc: Juerg Haefliger <juergh@gmail.com>,
Tycho Andersen <tycho@tycho.ws>,
jsteckli@amazon.de, Andi Kleen <ak@linux.intel.com>,
liran.alon@oracle.com, Kees Cook <keescook@google.com>,
Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>,
deepa.srinivasan@oracle.com,
chris hyser <chris.hyser@oracle.com>,
Tyler Hicks <tyhicks@canonical.com>,
"Woodhouse, David" <dwmw@amazon.co.uk>,
Andrew Cooper <andrew.cooper3@citrix.com>,
Jon Masters <jcm@redhat.com>,
Boris Ostrovsky <boris.ostrovsky@oracle.com>,
kanth.ghatraju@oracle.com,
Joao Martins <joao.m.martins@oracle.com>,
Jim Mattson <jmattson@google.com>,
pradeep.vincent@oracle.com, John Haxby <john.haxby@oracle.com>,
Thomas Gleixner <tglx@linutronix.de>,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
Christoph Hellwig <hch@lst.de>,
steven.sistare@oracle.com, Laura Abbott <labbott@redhat.com>,
Andrew Lutomirski <luto@kernel.org>,
Dave Hansen <dave.hansen@intel.com>,
Peter Zijlstra <peterz@infradead.org>,
Aaron Lu <aaron.lu@intel.com>,
Andrew Morton <akpm@linux-foundation.org>,
alexander.h.duyck@linux.intel.com,
Amir Goldstein <amir73il@gmail.com>,
Andrey Konovalov <andreyknvl@google.com>,
aneesh.kumar@linux.ibm.com, anthony.yznaga@oracle.com,
Ard Biesheuvel <ard.biesheuvel@linaro.org>,
Arnd Bergmann <arnd@arndb.de>,
arunks@codeaurora.org, Ben Hutchings <ben@decadent.org.uk>,
Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
Borislav Petkov <bp@alien8.de>,
brgl@bgdev.pl, Catalin Marinas <catalin.marinas@arm.com>,
Jonathan Corbet <corbet@lwn.net>,
cpandya@codeaurora.org, Daniel Vetter <daniel.vetter@ffwll.ch>,
Dan Williams <dan.j.williams@intel.com>,
Greg KH <gregkh@linuxfoundation.org>,
Roman Gushchin <guro@fb.com>,
Johannes Weiner <hannes@cmpxchg.org>,
"H. Peter Anvin" <hpa@zytor.com>,
Joonsoo Kim <iamjoonsoo.kim@lge.com>,
James Morse <james.morse@arm.com>, Jann Horn <jannh@google.com>,
Juergen Gross <jgross@suse.com>, Jiri Kosina <jkosina@suse.cz>,
James Morris <jmorris@namei.org>, Joe Perches <joe@perches.com>,
Souptick Joarder <jrdr.linux@gmail.com>,
Joerg Roedel <jroedel@suse.de>,
Keith Busch <keith.busch@intel.com>,
Konstantin Khlebnikov <khlebnikov@yandex-team.ru>,
Logan Gunthorpe <logang@deltatee.com>,
marco.antonio.780@gmail.com, Mark Rutland <mark.rutland@arm.com>,
Mel Gorman <mgorman@techsingularity.net>,
Michal Hocko <mhocko@suse.com>, Michal Hocko <mhocko@suse.cz>,
Mike Kravetz <mike.kravetz@oracle.com>,
Ingo Molnar <mingo@redhat.com>,
"Michael S. Tsirkin" <mst@redhat.com>,
Marek Szyprowski <m.szyprowski@samsung.com>,
Nicholas Piggin <npiggin@gmail.com>,
osalvador@suse.de,
"Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
pavel.tatashin@microsoft.com,
Randy Dunlap <rdunlap@infradead.org>,
richard.weiyang@gmail.com, Rik van Riel <riel@surriel.com>,
David Rientjes <rientjes@google.com>,
Robin Murphy <robin.murphy@arm.com>,
Steven Rostedt <rostedt@goodmis.org>,
Mike Rapoport <rppt@linux.vnet.ibm.com>,
Sai Praneeth Prakhya <sai.praneeth.prakhya@intel.com>,
"Serge E. Hallyn" <serge@hallyn.com>,
Steve Capper <steve.capper@arm.com>,
thymovanbeers@gmail.com, Vlastimil Babka <vbabka@suse.cz>,
Will Deacon <will.deacon@arm.com>,
Matthew Wilcox <willy@infradead.org>,
yang.shi@linux.alibaba.com, yaojun8558363@gmail.com,
Huang Ying <ying.huang@intel.com>,
zhangshaokun@hisilicon.com, iommu@lists.linux-foundation.org,
X86 ML <x86@kernel.org>,
linux-arm-kernel <linux-arm-kernel@lists.infradead.org>,
"open list:DOCUMENTATION" <linux-doc@vger.kernel.org>,
LKML <linux-kernel@vger.kernel.org>,
Linux-MM <linux-mm@kvack.org>,
LSM List <linux-security-module@vger.kernel.org>,
Khalid Aziz <khalid@gonehiking.org>
Subject: Re: [RFC PATCH v9 02/13] x86: always set IF before oopsing from page fault
Date: Wed, 3 Apr 2019 17:12:56 -0700 [thread overview]
Message-ID: <CALCETrXvwuwkVSJ+S5s7wTBkNNj3fRVxpx9BvsXWrT=3ZdRnCw@mail.gmail.com> (raw)
In-Reply-To: <e6c57f675e5b53d4de266412aa526b7660c47918.1554248002.git.khalid.aziz@oracle.com>
On Wed, Apr 3, 2019 at 10:36 AM Khalid Aziz <khalid.aziz@oracle.com> wrote:
>
> From: Tycho Andersen <tycho@tycho.ws>
>
> Oopsing might kill the task, via rewind_stack_do_exit() at the bottom, and
> that might sleep:
>
> diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c
> index 9d5c75f02295..7891add0913f 100644
> --- a/arch/x86/mm/fault.c
> +++ b/arch/x86/mm/fault.c
> @@ -858,6 +858,12 @@ no_context(struct pt_regs *regs, unsigned long error_code,
> /* Executive summary in case the body of the oops scrolled away */
> printk(KERN_DEFAULT "CR2: %016lx\n", address);
>
> + /*
> + * We're about to oops, which might kill the task. Make sure we're
> + * allowed to sleep.
> + */
> + flags |= X86_EFLAGS_IF;
> +
> oops_end(flags, regs, sig);
> }
>
NAK. If there's a bug in rewind_stack_do_exit(), please fix it in
rewind_stack_do_exit().
next prev parent reply other threads:[~2019-04-04 0:13 UTC|newest]
Thread overview: 70+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-03 17:34 [RFC PATCH v9 00/13] Add support for eXclusive Page Frame Ownership Khalid Aziz
2019-04-03 17:34 ` [RFC PATCH v9 01/13] mm: add MAP_HUGETLB support to vm_mmap Khalid Aziz
2019-04-03 17:34 ` [RFC PATCH v9 02/13] x86: always set IF before oopsing from page fault Khalid Aziz
2019-04-04 0:12 ` Andy Lutomirski [this message]
2019-04-04 1:42 ` Tycho Andersen
2019-04-04 4:12 ` Andy Lutomirski
2019-04-04 15:47 ` Tycho Andersen
2019-04-04 16:23 ` Sebastian Andrzej Siewior
2019-04-04 16:28 ` Thomas Gleixner
2019-04-04 17:11 ` Andy Lutomirski
2019-04-03 17:34 ` [RFC PATCH v9 03/13] mm: Add support for eXclusive Page Frame Ownership (XPFO) Khalid Aziz
2019-04-04 7:21 ` Peter Zijlstra
2019-04-04 9:25 ` Peter Zijlstra
2019-04-04 14:48 ` Tycho Andersen
2019-04-04 7:43 ` Peter Zijlstra
2019-04-04 15:15 ` Khalid Aziz
2019-04-04 17:01 ` Peter Zijlstra
2019-04-17 16:15 ` Ingo Molnar
2019-04-17 16:49 ` Khalid Aziz
2019-04-17 17:09 ` Ingo Molnar
2019-04-17 17:19 ` Nadav Amit
2019-04-17 17:26 ` Ingo Molnar
2019-04-17 17:44 ` Nadav Amit
2019-04-17 21:19 ` Thomas Gleixner
2019-04-17 23:18 ` Linus Torvalds
2019-04-17 23:42 ` Thomas Gleixner
2019-04-17 23:52 ` Linus Torvalds
2019-04-18 4:41 ` Andy Lutomirski
2019-04-18 5:41 ` Kees Cook
2019-04-18 14:34 ` Khalid Aziz
2019-04-22 19:30 ` Khalid Aziz
2019-04-22 22:23 ` Kees Cook
2019-04-18 6:14 ` Thomas Gleixner
2019-04-17 17:33 ` Khalid Aziz
2019-04-17 19:49 ` Andy Lutomirski
2019-04-17 19:52 ` Tycho Andersen
2019-04-17 20:12 ` Khalid Aziz
2019-05-01 14:49 ` Waiman Long
2019-05-01 15:18 ` Khalid Aziz
2019-04-03 17:34 ` [RFC PATCH v9 04/13] xpfo, x86: Add support for XPFO for x86-64 Khalid Aziz
2019-04-04 7:52 ` Peter Zijlstra
2019-04-04 15:40 ` Khalid Aziz
2019-04-03 17:34 ` [RFC PATCH v9 05/13] mm: add a user_virt_to_phys symbol Khalid Aziz
2019-04-03 17:34 ` [RFC PATCH v9 06/13] lkdtm: Add test for XPFO Khalid Aziz
2019-04-03 17:34 ` [RFC PATCH v9 07/13] arm64/mm: Add support " Khalid Aziz
2019-04-03 17:34 ` [RFC PATCH v9 08/13] swiotlb: Map the buffer if it was unmapped by XPFO Khalid Aziz
2019-04-03 17:34 ` [RFC PATCH v9 09/13] xpfo: add primitives for mapping underlying memory Khalid Aziz
2019-04-03 17:34 ` [RFC PATCH v9 10/13] arm64/mm, xpfo: temporarily map dcache regions Khalid Aziz
2019-04-03 17:34 ` [RFC PATCH v9 11/13] xpfo, mm: optimize spinlock usage in xpfo_kunmap Khalid Aziz
2019-04-04 7:56 ` Peter Zijlstra
2019-04-04 16:06 ` Khalid Aziz
2019-04-03 17:34 ` [RFC PATCH v9 12/13] xpfo, mm: Defer TLB flushes for non-current CPUs (x86 only) Khalid Aziz
2019-04-04 4:10 ` Andy Lutomirski
[not found] ` <91f1dbce-332e-25d1-15f6-0e9cfc8b797b@oracle.com>
2019-04-05 7:17 ` Thomas Gleixner
2019-04-05 14:44 ` Dave Hansen
2019-04-05 15:24 ` Andy Lutomirski
2019-04-05 15:56 ` Tycho Andersen
2019-04-05 16:32 ` Andy Lutomirski
2019-04-05 15:56 ` Khalid Aziz
2019-04-05 16:01 ` Dave Hansen
2019-04-05 16:27 ` Andy Lutomirski
2019-04-05 16:41 ` Peter Zijlstra
2019-04-05 17:35 ` Khalid Aziz
2019-04-05 15:44 ` Khalid Aziz
2019-04-05 15:24 ` Andy Lutomirski
2019-04-04 8:18 ` Peter Zijlstra
2019-04-03 17:34 ` [RFC PATCH v9 13/13] xpfo, mm: Optimize XPFO TLB flushes by batching them together Khalid Aziz
2019-04-04 16:44 ` [RFC PATCH v9 00/13] Add support for eXclusive Page Frame Ownership Nadav Amit
2019-04-04 17:18 ` Khalid Aziz
2019-04-06 6:40 ` Jon Masters
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='CALCETrXvwuwkVSJ+S5s7wTBkNNj3fRVxpx9BvsXWrT=3ZdRnCw@mail.gmail.com' \
--to=luto@kernel.org \
--cc=aaron.lu@intel.com \
--cc=ak@linux.intel.com \
--cc=akpm@linux-foundation.org \
--cc=alexander.h.duyck@linux.intel.com \
--cc=amir73il@gmail.com \
--cc=andrew.cooper3@citrix.com \
--cc=andreyknvl@google.com \
--cc=aneesh.kumar@linux.ibm.com \
--cc=anthony.yznaga@oracle.com \
--cc=ard.biesheuvel@linaro.org \
--cc=arnd@arndb.de \
--cc=arunks@codeaurora.org \
--cc=ben@decadent.org.uk \
--cc=bigeasy@linutronix.de \
--cc=boris.ostrovsky@oracle.com \
--cc=bp@alien8.de \
--cc=brgl@bgdev.pl \
--cc=catalin.marinas@arm.com \
--cc=chris.hyser@oracle.com \
--cc=corbet@lwn.net \
--cc=cpandya@codeaurora.org \
--cc=dan.j.williams@intel.com \
--cc=daniel.vetter@ffwll.ch \
--cc=dave.hansen@intel.com \
--cc=deepa.srinivasan@oracle.com \
--cc=dwmw@amazon.co.uk \
--cc=gregkh@linuxfoundation.org \
--cc=guro@fb.com \
--cc=hannes@cmpxchg.org \
--cc=hch@lst.de \
--cc=hpa@zytor.com \
--cc=iamjoonsoo.kim@lge.com \
--cc=iommu@lists.linux-foundation.org \
--cc=james.morse@arm.com \
--cc=jannh@google.com \
--cc=jcm@redhat.com \
--cc=jgross@suse.com \
--cc=jkosina@suse.cz \
--cc=jmattson@google.com \
--cc=jmorris@namei.org \
--cc=joao.m.martins@oracle.com \
--cc=joe@perches.com \
--cc=john.haxby@oracle.com \
--cc=jrdr.linux@gmail.com \
--cc=jroedel@suse.de \
--cc=jsteckli@amazon.de \
--cc=juergh@gmail.com \
--cc=kanth.ghatraju@oracle.com \
--cc=keescook@google.com \
--cc=keith.busch@intel.com \
--cc=khalid.aziz@oracle.com \
--cc=khalid@gonehiking.org \
--cc=khlebnikov@yandex-team.ru \
--cc=kirill.shutemov@linux.intel.com \
--cc=konrad.wilk@oracle.com \
--cc=labbott@redhat.com \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-doc@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=linux-security-module@vger.kernel.org \
--cc=liran.alon@oracle.com \
--cc=logang@deltatee.com \
--cc=m.szyprowski@samsung.com \
--cc=marco.antonio.780@gmail.com \
--cc=mark.rutland@arm.com \
--cc=mgorman@techsingularity.net \
--cc=mhocko@suse.com \
--cc=mhocko@suse.cz \
--cc=mike.kravetz@oracle.com \
--cc=mingo@redhat.com \
--cc=mst@redhat.com \
--cc=npiggin@gmail.com \
--cc=osalvador@suse.de \
--cc=paulmck@linux.vnet.ibm.com \
--cc=pavel.tatashin@microsoft.com \
--cc=peterz@infradead.org \
--cc=pradeep.vincent@oracle.com \
--cc=rdunlap@infradead.org \
--cc=richard.weiyang@gmail.com \
--cc=riel@surriel.com \
--cc=rientjes@google.com \
--cc=robin.murphy@arm.com \
--cc=rostedt@goodmis.org \
--cc=rppt@linux.vnet.ibm.com \
--cc=sai.praneeth.prakhya@intel.com \
--cc=serge@hallyn.com \
--cc=steve.capper@arm.com \
--cc=steven.sistare@oracle.com \
--cc=tglx@linutronix.de \
--cc=thymovanbeers@gmail.com \
--cc=tycho@tycho.ws \
--cc=tyhicks@canonical.com \
--cc=vbabka@suse.cz \
--cc=will.deacon@arm.com \
--cc=willy@infradead.org \
--cc=x86@kernel.org \
--cc=yang.shi@linux.alibaba.com \
--cc=yaojun8558363@gmail.com \
--cc=ying.huang@intel.com \
--cc=zhangshaokun@hisilicon.com \
/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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox