From: Markus Elfring <Markus.Elfring@web.de>
To: Ryosuke Yasuoka <ryasuoka@redhat.com>,
dri-devel@lists.freedesktop.org, linux-mm@kvack.org,
virtualization@lists.linux.dev,
Andrew Morton <akpm@linux-foundation.org>,
Chia-I Wu <olvaffe@gmail.com>,
Christoph Hellwig <hch@infradead.org>,
Dmitry Osipenko <dmitry.osipenko@collabora.com>,
David Airlie <airlied@gmail.com>,
Gerd Hoffmann <kraxel@redhat.com>,
Gurchetan Singh <gurchetansingh@chromium.org>,
Jocelyn Falempe <jfalempe@redhat.com>,
Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
Maxime Ripard <mripard@kernel.org>,
Simona Vetter <simona@ffwll.ch>,
Thomas Zimmermann <tzimmermann@suse.de>,
Uladzislau Rezki <urezki@gmail.com>
Cc: LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH drm-next 1/2] vmalloc: Add atomic_vmap
Date: Wed, 5 Mar 2025 18:08:57 +0100 [thread overview]
Message-ID: <851bef96-245b-4f5c-8390-ab94dbc04063@web.de> (raw)
In-Reply-To: <20250305152555.318159-2-ryasuoka@redhat.com>
> Some drivers can use vmap in drm_panic, however, vmap is sleepable and
> takes locks. Since drm_panic will vmap in panic handler, atomic_vmap
> requests pages with GFP_ATOMIC and maps KVA without locks and sleep.
See also:
https://web.git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/process/submitting-patches.rst?h=v6.14-rc5#n94
Regards,
Markus
next prev parent reply other threads:[~2025-03-05 17:09 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-03-05 15:25 [PATCH drm-next 0/2] Enhance drm_panic Support for Virtio-GPU Ryosuke Yasuoka
2025-03-05 15:25 ` [PATCH drm-next 1/2] vmalloc: Add atomic_vmap Ryosuke Yasuoka
2025-03-05 17:08 ` Markus Elfring [this message]
2025-03-05 17:27 ` Uladzislau Rezki
2025-03-06 4:52 ` Matthew Wilcox
2025-03-06 13:24 ` Jocelyn Falempe
2025-03-06 14:04 ` Uladzislau Rezki
2025-03-06 15:52 ` Simona Vetter
2025-03-07 7:54 ` Jocelyn Falempe
2025-03-09 8:07 ` Ryosuke Yasuoka
2025-03-10 10:23 ` Jocelyn Falempe
2025-03-05 15:25 ` [PATCH drm-next 2/2] drm/virtio: Use atomic_vmap to work drm_panic in GUI Ryosuke Yasuoka
2025-03-06 23:56 ` kernel test robot
2025-03-07 3:07 ` kernel test robot
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