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Thu, 29 Oct 2026 01:51:25 -0700 (PDT) Received: from localhost.localdomain ([183.96.175.225]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2eae6bddae0sm29991205ad.35.2026.10.29.01.51.21 (version=TLS1_3 cipher=TLS_CHACHA20_POLY1305_SHA256 bits=256/256); Thu, 29 Oct 2026 01:51:25 -0700 (PDT) From: Joonho Lee To: linux-sound@vger.kernel.org Cc: tiwai@suse.de, perex@perex.cz, anton.yakovlev@opensynergy.com, mst@redhat.com, virtualization@lists.linux.dev, linux-kernel@vger.kernel.org, corbet@lwn.net, skhan@linuxfoundation.org, rdunlap@infradead.org, linux-doc@vger.kernel.org, Joonho Lee Subject: [PATCH v9 10/14] ALSA: virtio: prioritize staged capture period work Date: Thu, 29 Oct 2026 17:50:28 +0900 Message-ID: <20261029085032.70689-11-mynameisjune111@gmail.com> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20261029085032.70689-1-mynameisjune111@gmail.com> References: <20261029085032.70689-1-mynameisjune111@gmail.com> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Queue staged capture period notifications on system_highpri_wq through the common scheduling helper. This allows capture notifications to make progress when ordinary workqueue workers are delayed by CPU contention. Playback and ordinary capture keep schedule_work(). This preserves the existing priority proposal without mixing RESET or lifecycle changes into it. It provides no hard real-time deadline and cannot prevent a userspace reader from overrunning its buffer. Assisted-by: LLM Signed-off-by: Joonho Lee --- diff --git a/sound/virtio/virtio_pcm.h b/sound/virtio/virtio_pcm.h --- a/sound/virtio/virtio_pcm.h +++ b/sound/virtio/virtio_pcm.h @@ -159,6 +159,10 @@ static inline bool virtsnd_pcm_schedule_period_elapsed(struct virtio_pcm_substream *vss) { + if (vss->direction == SNDRV_PCM_STREAM_CAPTURE && + vss->capture_staging) + return queue_work(system_highpri_wq, &vss->elapsed_period); + return schedule_work(&vss->elapsed_period); }