From: Oliver Sang <oliver.sang@intel.com>
To: Mel Gorman <mgorman@techsingularity.net>
Cc: Andrew Morton <akpm@linux-foundation.org>,
0day robot <lkp@intel.com>, LKML <linux-kernel@vger.kernel.org>,
linux-mm@kvack.org, lkp@lists.01.org,
Nicolas Saenz Julienne <nsaenzju@redhat.com>,
Marcelo Tosatti <mtosatti@redhat.com>,
Vlastimil Babka <vbabka@suse.cz>,
Michal Hocko <mhocko@kernel.org>, Hugh Dickins <hughd@google.com>
Subject: Re: [mm/page_alloc] 2bd8eec68f: BUG:sleeping_function_called_from_invalid_context_at_mm/gup.c
Date: Wed, 6 Jul 2022 22:25:30 +0800 [thread overview]
Message-ID: <YsWbWsN2qPbWsNWZ@xsang-OptiPlex-9020> (raw)
In-Reply-To: <20220706095535.GD27531@techsingularity.net>
hi, Mel Gorman,
On Wed, Jul 06, 2022 at 10:55:35AM +0100, Mel Gorman wrote:
> On Tue, Jul 05, 2022 at 09:51:25PM +0800, Oliver Sang wrote:
> > Hi Andrew Morton,
> >
> > On Sun, Jul 03, 2022 at 01:22:09PM -0700, Andrew Morton wrote:
> > > On Sun, 3 Jul 2022 17:44:30 +0800 kernel test robot <oliver.sang@intel.com> wrote:
> > >
> > > > FYI, we noticed the following commit (built with gcc-11):
> > > >
> > > > commit: 2bd8eec68f740608db5ea58ecff06965228764cb ("[PATCH 7/7] mm/page_alloc: Replace local_lock with normal spinlock")
> > > > url: https://github.com/intel-lab-lkp/linux/commits/Mel-Gorman/Drain-remote-per-cpu-directly/20220613-230139
> > > > base: https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git b13baccc3850ca8b8cccbf8ed9912dbaa0fdf7f3
> > > > patch link: https://lore.kernel.org/lkml/20220613125622.18628-8-mgorman@techsingularity.net
> > > >
> > >
> > > Did this test include the followup patch
> > > mm-page_alloc-replace-local_lock-with-normal-spinlock-fix.patch?
> >
> > no, we just fetched original patch set and test upon it.
> >
> > now we applied the patch you pointed to us upon 2bd8eec68f and found the issue
> > still exist.
> > (attached dmesg FYI)
> >
>
> Thanks Oliver.
>
> The trace is odd in that it hits in GUP when the page allocator is no
> longer active and the context is a syscall. First, is this definitely
> the first patch the problem occurs?
>
> Second, it's possible for IRQs to be enabled and an IRQ delivered before
> preemption is enabled. It's not clear why that would be a problem other
> than lacking symmetry or how it could result in the reported BUG but
> might as well rule it out. This is build tested only
do you want us test below patch?
if so, should we apply it upon the patch
"mm/page_alloc: Replace local_lock with normal spinlock"
or
"mm/page_alloc: replace local_lock with normal spinlock -fix"?
>
> diff --git a/mm/page_alloc.c b/mm/page_alloc.c
> index 934d1b5a5449..d0141e51e613 100644
> --- a/mm/page_alloc.c
> +++ b/mm/page_alloc.c
> @@ -192,14 +192,14 @@ static DEFINE_MUTEX(pcp_batch_high_lock);
>
> #define pcpu_spin_unlock(member, ptr) \
> ({ \
> - spin_unlock(&ptr->member); \
> pcpu_task_unpin(); \
> + spin_unlock(&ptr->member); \
> })
>
> #define pcpu_spin_unlock_irqrestore(member, ptr, flags) \
> ({ \
> - spin_unlock_irqrestore(&ptr->member, flags); \
> pcpu_task_unpin(); \
> + spin_unlock_irqrestore(&ptr->member, flags); \
> })
>
> /* struct per_cpu_pages specific helpers. */
>
>
>
next prev parent reply other threads:[~2022-07-06 14:25 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-06-13 12:56 [PATCH v4 00/7] Drain remote per-cpu directly Mel Gorman
2022-06-13 12:56 ` [PATCH 1/7] mm/page_alloc: Add page->buddy_list and page->pcp_list Mel Gorman
2022-06-13 12:56 ` [PATCH 2/7] mm/page_alloc: Use only one PCP list for THP-sized allocations Mel Gorman
2022-06-13 12:56 ` [PATCH 3/7] mm/page_alloc: Split out buddy removal code from rmqueue into separate helper Mel Gorman
2022-06-13 12:56 ` [PATCH 4/7] mm/page_alloc: Remove mistaken page == NULL check in rmqueue Mel Gorman
2022-06-13 12:56 ` [PATCH 5/7] mm/page_alloc: Protect PCP lists with a spinlock Mel Gorman
2022-06-16 15:59 ` Vlastimil Babka
2022-06-13 12:56 ` [PATCH 6/7] mm/page_alloc: Remotely drain per-cpu lists Mel Gorman
2022-06-16 16:41 ` Vlastimil Babka
2022-06-13 12:56 ` [PATCH 7/7] mm/page_alloc: Replace local_lock with normal spinlock Mel Gorman
2022-06-15 22:43 ` Yu Zhao
[not found] ` <CGME20220615224855eucas1p1ea6d90c23ec9423dfe04b267f6dddd2a@eucas1p1.samsung.com>
2022-06-15 22:48 ` Marek Szyprowski
2022-06-15 23:04 ` Andrew Morton
2022-06-16 3:05 ` Yu Zhao
2022-06-17 7:55 ` Vlastimil Babka
2022-06-17 6:47 ` Marek Szyprowski
2022-06-21 9:21 ` Mel Gorman
2022-06-16 17:01 ` Vlastimil Babka
2022-06-16 21:07 ` Yu Zhao
2022-06-17 7:57 ` Vlastimil Babka
2022-06-21 9:27 ` Mel Gorman
2022-06-21 9:26 ` Mel Gorman
2022-06-17 9:39 ` Nicolas Saenz Julienne
2022-06-21 9:29 ` Mel Gorman
2022-06-21 9:31 ` Nicolas Saenz Julienne
2022-07-03 9:44 ` [mm/page_alloc] 2bd8eec68f: BUG:sleeping_function_called_from_invalid_context_at_mm/gup.c kernel test robot
2022-07-03 20:22 ` Andrew Morton
2022-07-05 13:51 ` Oliver Sang
2022-07-06 9:55 ` Mel Gorman
2022-07-06 11:53 ` Mel Gorman
2022-07-06 14:21 ` Oliver Sang
2022-07-06 14:52 ` Mel Gorman
2022-07-07 8:22 ` Oliver Sang
2022-07-06 14:25 ` Oliver Sang [this message]
2022-07-06 14:53 ` Mel Gorman
2022-07-07 21:55 ` Vlastimil Babka
2022-07-08 10:56 ` Mel Gorman
2022-07-12 5:04 ` Oliver Sang
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