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Wed, 11 Nov 2026 22:24:52 -0800 (PST) Received: from localhost.localdomain ([183.96.175.225]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2edb6a3e61bsm26979965ad.11.2026.11.11.22.24.48 (version=TLS1_3 cipher=TLS_CHACHA20_POLY1305_SHA256 bits=256/256); Wed, 11 Nov 2026 22:24:51 -0800 (PST) From: Joonho Lee To: linux-sound@vger.kernel.org Cc: tiwai@suse.com, 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 Subject: [PATCH v30 00/17] ALSA: virtio: preserve PCM progress Date: Thu, 12 Nov 2026 15:24:29 +0900 Message-ID: <20261112062446.159-1-mynameisjune111@gmail.com> X-Mailer: git-send-email 2.54.0 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 This v30 revision resends v29 with no code changes. Patch 17 clarifies the commit description and moves qualification limits to this cover letter, following the review. The other patch messages and code are unchanged. Previous version: https://lore.kernel.org/linux-sound/20261112053446.73504-1-mynameisjune111@gmail.com/T/ This resends v28 in full using mynameisjune111@gmail.com for every message. There are no code or patch-description changes from v28; the existing human DCO trailers are retained. The v28 documentation patch 14 was rejected by Gmail. Sending that message through my Workspace account made it available on Lore, but Sashiko grouped it separately from the other sixteen patches. This revision sends the complete series with one From address. Previous version: https://lore.kernel.org/linux-sound/20261112043516.37010-1-mynameisjune111@gmail.com/T/ The following describes the changes and validation already included in v28. This replaces v27 in full. Apply all seventeen patches directly to base commit a4311e9447bbb219044db38897f95be112f46a8a. The previous public version is at: https://lore.kernel.org/linux-sound/20261112004704.49758-1-mynameisjune111@gmail.com/T/ Changes since v27 are confined to patch 12. The other patch diffs are unchanged. I reproduced both capture findings from the Sashiko review. If request N+1 completed before N, RESET could leave N+1's already completed payload eligible for later delivery. After an external XRUN, rejecting N also left N+1 buffered until generation cleanup. PREPARE cleared that state in the control test, so this does not establish a permanent recovery failure. RESET now marks valid completed payloads present at the pointer observation as discarded while retaining their ordered placeholders. This lets the commit sequence advance when older requests return. Transport-owned requests and data arriving after the observation remain eligible to commit. Repeated RESET preserves the discard, and invalid response status still reports XRUN. Rejected completions also release returned buffered entries without resetting the sequence of requests still owned by the transport. The failed native PAUSE path previously reopened the queue with the STOP quiet boundary and capture_stopping flag still set. A running stream could then accept an empty completion without the normal XRUN check. Rollback now restores the prior flags under the substream lock and checks the reset epoch before reopening admission. ARM64 QEMU tests use the actual driver functions with test-only request ordering and STOP allocation-failure injection. The v27 baseline fails eight affected assertions; the candidate passes all thirteen assertions, including normal reordering, post-observation delivery, invalid status, and STOP empty-tail controls. The running-observation test invokes the actual pointer-observation helper. Full RUNNING RESET ioctls are covered separately by the production regression. The production driver module was built separately without those hooks. Its ARM64 W=1 build and eight QEMU regression runs passed with the matching v27 KASAN/lockdep kernel and core modules. These cover RW/MMAP capture, PREPARED RESET with DRAIN/reopen, RUNNING RESET, and playback PAUSE/RELEASE, HWSYNC/poll, DROP and reopen. Capture includes 70-second RW and resumed MMAP phases. The independent backend-sequence oracle matched 7,104,000 frames across seven capture phases. No KASAN or lockdep diagnostic appeared. The kernel image and core were reused unchanged; the modified driver was rebuilt. Fresh KCSAN and physical VZ tests were not run for this revision. The earlier v27 KCSAN and Scarlett results describe that earlier build. The controlled tests use synthetic requests and a known STOP failure before submission; they do not qualify transport timeout/uncertainty or demonstrate out-of-order completions on physical hardware. Intermediate patch stages are application-checked; the fresh runtime tests cover the final candidate. Review addressed: https://lore.kernel.org/linux-sound/sashiko-outbox-210240@kernel.org/ Playback validation limits: The one-period reduction in the TX queue has not been qualified for worst-case scheduling tolerance. The tree through the preceding playback-completion change was inspected but not run separately. The playback gate tests used ARM64 QEMU; they did not include KCSAN or physical audio. They do not qualify the full series. base-commit: a4311e9447bbb219044db38897f95be112f46a8a