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Sun, 29 Mar 2026 09:17:52 -0700 (PDT) List-Id: Commit messages for the main branch of the src repository List-Archive: https://lists.freebsd.org/archives/dev-commits-src-main List-Help: List-Post: List-Subscribe: List-Unsubscribe: X-BeenThere: dev-commits-src-main@freebsd.org Sender: owner-dev-commits-src-main@FreeBSD.org MIME-Version: 1.0 References: <69a71c76.409df.5a93939b@gitrepo.freebsd.org> In-Reply-To: <69a71c76.409df.5a93939b@gitrepo.freebsd.org> From: Alan Somers Date: Sun, 29 Mar 2026 10:17:40 -0600 X-Gm-Features: AQROBzCnpNVfVEbEQ2iIL2BlvUCq1XPqEFIYwINXvN-Iv120_TEfxR7sX9zQhBM Message-ID: Subject: Re: git: c8c37141a661 - main - virtio_blk: Use bus_dma for command/ack buffer allocations To: Andrew Turner Cc: src-committers@freebsd.org, dev-commits-src-all@freebsd.org, dev-commits-src-main@freebsd.org, Sarah Walker Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Spamd-Result: default: False [-3.88 / 15.00]; ARC_ALLOW(-1.00)[google.com:s=arc-20240605:i=1]; NEURAL_HAM_MEDIUM(-0.99)[-0.993]; NEURAL_HAM_LONG(-0.99)[-0.991]; NEURAL_HAM_SHORT(-0.99)[-0.991]; FORGED_SENDER(0.30)[asomers@freebsd.org,asomers@gmail.com]; R_SPF_ALLOW(-0.20)[+ip4:209.85.128.0/17:c]; DMARC_POLICY_SOFTFAIL(0.10)[freebsd.org : SPF not aligned (relaxed), No valid DKIM,none]; MIME_GOOD(-0.10)[text/plain]; FREEFALL_USER(0.00)[asomers]; ASN(0.00)[asn:15169, ipnet:209.85.128.0/17, country:US]; MIME_TRACE(0.00)[0:+]; TO_DN_SOME(0.00)[]; RCVD_COUNT_ONE(0.00)[1]; FROM_HAS_DN(0.00)[]; FREEMAIL_ENVFROM(0.00)[gmail.com]; TO_MATCH_ENVRCPT_SOME(0.00)[]; RWL_MAILSPIKE_POSSIBLE(0.00)[209.85.208.49:from]; FROM_NEQ_ENVFROM(0.00)[asomers@freebsd.org,asomers@gmail.com]; RCVD_TLS_LAST(0.00)[]; PREVIOUSLY_DELIVERED(0.00)[dev-commits-src-main@freebsd.org]; RCVD_IN_DNSWL_NONE(0.00)[209.85.208.49:from]; MLMMJ_DEST(0.00)[dev-commits-src-main@freebsd.org]; MISSING_XM_UA(0.00)[]; R_DKIM_NA(0.00)[]; RCPT_COUNT_FIVE(0.00)[5] X-Rspamd-Queue-Id: 4fkKKt3KTbz4N5Y X-Spamd-Bar: --- On Tue, Mar 3, 2026 at 10:38=E2=80=AFAM Andrew Turner = wrote: > > The branch main has been updated by andrew: > > URL: https://cgit.FreeBSD.org/src/commit/?id=3Dc8c37141a661cc9a6a51e43599= d1afc8a3f0ef46 > > commit c8c37141a661cc9a6a51e43599d1afc8a3f0ef46 > Author: Sarah Walker > AuthorDate: 2026-03-03 16:27:38 +0000 > Commit: Andrew Turner > CommitDate: 2026-03-03 16:29:15 +0000 > > virtio_blk: Use bus_dma for command/ack buffer allocations > > While the majority of virtio platforms will be fully coherent, some m= ay > require cache maintenance or other specific device memory handling (e= g for > secure partitioning). Using bus_dma allows for these usecases. > > The virtio buffers are marked as coherent; this should ensure that sy= nc > calls are no-ops in the common cases. > > Reviewed by: andrew, br > Sponsored by: Arm Ltd > Differential Revision: https://reviews.freebsd.org/D54960 After this commit, my VM can no longer dump core. When I try, it panics again. Could you please investigate? And let's move discussion to Bugzilla: https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D294120 .