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From: Daniel Vetter <daniel@ffwll.ch>
To: Jason Gunthorpe <jgg@ziepe.ca>
Cc: "Michal Hocko" <mhocko@kernel.org>,
	"Feng Tang" <feng.tang@intel.com>,
	"Randy Dunlap" <rdunlap@infradead.org>,
	"Kees Cook" <keescook@chromium.org>,
	"Masahiro Yamada" <yamada.masahiro@socionext.com>,
	"Peter Zijlstra" <peterz@infradead.org>,
	"Intel Graphics Development" <intel-gfx@lists.freedesktop.org>,
	"Jann Horn" <jannh@google.com>,
	LKML <linux-kernel@vger.kernel.org>,
	"DRI Development" <dri-devel@lists.freedesktop.org>,
	"Linux MM" <linux-mm@kvack.org>,
	"Jérôme Glisse" <jglisse@redhat.com>,
	"Ingo Molnar" <mingo@redhat.com>,
	"Thomas Gleixner" <tglx@linutronix.de>,
	"David Rientjes" <rientjes@google.com>,
	"Wei Wang" <wvw@google.com>,
	"Daniel Vetter" <daniel.vetter@intel.com>,
	"Andrew Morton" <akpm@linux-foundation.org>,
	"Andy Shevchenko" <andriy.shevchenko@linux.intel.com>,
	"Christian König" <christian.koenig@amd.com>
Subject: Re: [Intel-gfx] [PATCH 2/5] kernel.h: Add non_block_start/end()
Date: Fri, 16 Aug 2019 18:36:52 +0200
Message-ID: <CAKMK7uGzOO4nZPbZzmaDjjBGZiV2HjgdbT45q9Rd5wTO14VH2w@mail.gmail.com> (raw)
In-Reply-To: <20190816143819.GE5398@ziepe.ca>

On Fri, Aug 16, 2019 at 4:38 PM Jason Gunthorpe <jgg@ziepe.ca> wrote:
>
> On Fri, Aug 16, 2019 at 04:11:34PM +0200, Daniel Vetter wrote:
> > Also, aside from this patch (which is prep for the next) and some
> > simple reordering conflicts they're all independent. So if there's no
> > way to paint this bikeshed here (technicolor perhaps?) then I'd like
> > to get at least the others considered.
>
> Sure, I think for conflict avoidance reasons I'm probably taking
> mmu_notifier stuff via hmm.git, so:
>
> - Andrew had a minor remark on #1, I am ambivalent and would take it
>   as-is. Your decision if you want to respin.

I like mine better, see also the reply from Ralph Campbell.

> - #2/#3 is this issue, I would stand by the preempt_disable/etc path
>   Our situation matches yours, debug tests run lockdep/etc.

Since Michal requested the current flavour I think we need spin a bit
more on these here. I guess I'll just rebase them to the end so
they're not holding up the others.

> - #4 I like a lot, except the map should enclose range_end too,
>   this can be done after the mm_has_notifiers inside the
>   __mmu_notifier function

To make sure I get this right: The same lockdep context, but also
wrapped around invalidate_range_end? From my understanding of pte
zapping that makes sense, but I'm definitely not well-versed enough
for that.

>   Can you respin?

Will do.

>   I will propose preloading the map in another patch
> - #5 is already applied in -rc

Yup, I'll drop that one.

Thanks, Daniel
-- 
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch


  reply index

Thread overview: 69+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-14 20:20 [PATCH 0/5] hmm & mmu_notifier debug/lockdep annotations Daniel Vetter
2019-08-14 20:20 ` [PATCH 1/5] mm: Check if mmu notifier callbacks are allowed to fail Daniel Vetter
2019-08-14 22:14   ` Andrew Morton
2019-08-14 23:22     ` Jason Gunthorpe
2019-08-14 23:34     ` Ralph Campbell
2019-08-16 17:19   ` Jason Gunthorpe
2019-08-14 20:20 ` [PATCH 2/5] kernel.h: Add non_block_start/end() Daniel Vetter
2019-08-14 20:45   ` Andrew Morton
2019-08-15  6:52     ` Daniel Vetter
2019-08-15  8:44     ` Michal Hocko
2019-08-15 13:04       ` Jason Gunthorpe
2019-08-15 13:12         ` Daniel Vetter
2019-08-15 14:37           ` Jason Gunthorpe
2019-08-15 14:43             ` Daniel Vetter
2019-08-15 15:10               ` Jason Gunthorpe
2019-08-15 16:25                 ` Daniel Vetter
2019-08-15 17:35                   ` Jason Gunthorpe
2019-08-15 17:39                     ` Jerome Glisse
2019-08-15 18:01                       ` Jason Gunthorpe
2019-08-15 18:27                         ` Jerome Glisse
2019-08-15 18:57                           ` Jason Gunthorpe
2019-08-15 16:32                 ` Jerome Glisse
2019-08-15 17:16                   ` Jason Gunthorpe
2019-08-15 17:21                     ` Daniel Vetter
2019-08-15 17:35                       ` Jerome Glisse
2019-08-15 13:24         ` Michal Hocko
2019-08-15 22:15       ` Andrew Morton
2019-08-16  8:24         ` Michal Hocko
2019-08-14 23:58   ` Jason Gunthorpe
2019-08-15  6:58     ` Daniel Vetter
2019-08-15 12:23       ` Jason Gunthorpe
2019-08-15 13:21         ` Michal Hocko
2019-08-15 14:12           ` Jason Gunthorpe
2019-08-15 16:00             ` Michal Hocko
2019-08-15 16:56               ` Jason Gunthorpe
2019-08-15 17:11                 ` Jerome Glisse
2019-08-15 17:17                   ` Jason Gunthorpe
2019-08-15 17:42                 ` Michal Hocko
2019-08-15 17:57                   ` Jerome Glisse
2019-08-15 18:24                   ` Jason Gunthorpe
2019-08-15 19:05                     ` Michal Hocko
2019-08-15 19:18                       ` Jason Gunthorpe
2019-08-15 19:35                         ` Michal Hocko
2019-08-15 20:13                           ` Jason Gunthorpe
2019-08-16  8:10                             ` Michal Hocko
2019-08-16 12:19                               ` Jason Gunthorpe
2019-08-16 12:26                                 ` Michal Hocko
2019-08-15 20:16                           ` [Intel-gfx] " Daniel Vetter
2019-08-15 20:27                             ` Jason Gunthorpe
2019-08-15 20:49                               ` Daniel Vetter
2019-08-16  1:00                                 ` Jason Gunthorpe
2019-08-16  6:20                                   ` Daniel Vetter
2019-08-16 12:12                                     ` Jason Gunthorpe
2019-08-16 14:11                                       ` Daniel Vetter
2019-08-16 14:38                                         ` Jason Gunthorpe
2019-08-16 16:36                                           ` Daniel Vetter [this message]
2019-08-16 16:54                                             ` Jason Gunthorpe
2019-08-16  8:27                             ` Michal Hocko
2019-08-14 20:20 ` [PATCH 3/5] mm, notifier: Catch sleeping/blocking for !blockable Daniel Vetter
2019-08-15  0:00   ` Jason Gunthorpe
2019-08-15  7:02     ` Daniel Vetter
     [not found]       ` <20190815123556.GB21596@ziepe.ca>
2019-08-17 16:09         ` Daniel Vetter
2019-08-14 20:20 ` [PATCH 4/5] mm, notifier: Add a lockdep map for invalidate_range_start Daniel Vetter
2019-08-15  0:09   ` Jason Gunthorpe
2019-08-15  7:10     ` Daniel Vetter
2019-08-15 12:53       ` Jason Gunthorpe
2019-08-14 20:20 ` [PATCH 5/5] mm/hmm: WARN on illegal ->sync_cpu_device_pagetables errors Daniel Vetter
2019-08-15  0:11   ` Jason Gunthorpe
2019-08-15  7:14     ` Daniel Vetter

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