From: Lorenzo Stoakes <ljs@kernel•org>
To: Marc Zyngier <maz@kernel•org>
Cc: Waiman Long <longman@redhat•com>,
Thomas Gleixner <tglx@linutronix•de>,
Sebastian Andrzej Siewior <bigeasy@linutronix•de>,
Clark Williams <clrkwllms@kernel•org>,
Steven Rostedt <rostedt@goodmis•org>,
Andrew Morton <akpm@linux-foundation•org>,
David Hildenbrand <david@kernel•org>,
"Liam R. Howlett" <liam@infradead•org>,
Vlastimil Babka <vbabka@kernel•org>,
Mike Rapoport <rppt@kernel•org>,
Suren Baghdasaryan <surenb@google•com>,
Michal Hocko <mhocko@suse•com>,
linux-arm-kernel@lists•infradead.org,
linux-kernel@vger•kernel.org, linux-mm@kvack•org,
linux-rt-devel@lists•linux.dev
Subject: Re: [PATCH 2/2] irqchip/gic-v3-its: Use GFP_ATOMIC_RT gfp flag in allocate_vpe_l1_table()
Date: Fri, 22 May 2026 10:06:42 +0100 [thread overview]
Message-ID: <ahAcWjiPbf-V554w@lucifer> (raw)
In-Reply-To: <861pf3x3hc.wl-maz@kernel.org>
On Fri, May 22, 2026 at 09:17:35AM +0100, Marc Zyngier wrote:
> On Wed, 20 May 2026 21:46:28 +0100,
> Waiman Long <longman@redhat•com> wrote:
> >
> > A longer term solution is to defer the allocation to a later stage of the
> > hotplug pipeline where interrupt isn't disabled.
>
> And that's what needs doing. Not papering over this in a bizarre way.
> I proposed a potential solution a few months back, but didn't get a
> chance to work on it. If you have the bandwidth, that's the way to go.
>
> But papering over this issue this way seems like a bad case of short
> term and unsustainable hack.
Yes, agreed. It really smacks of trying the fix the problem at the wrong level
of abstraction.
>
> Thanks,
>
> M.
>
> --
> Without deviation from the norm, progress is not possible.
Cheers, Lorenzo
next prev parent reply other threads:[~2026-05-22 9:07 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-20 20:46 [PATCH 1/2] gfp_types: Introduce a new GFP_ATOMIC_RT gfp flag Waiman Long
2026-05-20 20:46 ` [PATCH 2/2] irqchip/gic-v3-its: Use GFP_ATOMIC_RT gfp flag in allocate_vpe_l1_table() Waiman Long
2026-05-22 8:17 ` Marc Zyngier
2026-05-22 9:06 ` Lorenzo Stoakes [this message]
2026-05-21 16:40 ` [PATCH 1/2] gfp_types: Introduce a new GFP_ATOMIC_RT gfp flag Lorenzo Stoakes
2026-05-21 17:40 ` Waiman Long
2026-05-22 8:46 ` Lorenzo Stoakes
2026-05-25 8:41 ` Michal Hocko
2026-05-26 8:28 ` Sebastian Andrzej Siewior
2026-05-26 13:55 ` Vlastimil Babka (SUSE)
2026-05-27 8:41 ` Michal Hocko
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