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[87.16.204.83]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-4463d02f270sm6398058f8f.9.2026.04.28.06.12.47 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 28 Apr 2026 06:12:48 -0700 (PDT) Date: Tue, 28 Apr 2026 15:12:40 +0200 From: Stefano Garzarella To: Hamza Mahfooz Cc: netdev@vger.kernel.org, "K. Y. Srinivasan" , Haiyang Zhang , Wei Liu , Dexuan Cui , Long Li , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Simon Horman , Michael Kelley , Himadri Pandya , linux-hyperv@vger.kernel.org, virtualization@lists.linux.dev, linux-kernel@vger.kernel.org Subject: Re: [PATCH] hv_sock: fix ARM64 support Message-ID: References: <20260428125339.13963-1-hamzamahfooz@linux.microsoft.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20260428125339.13963-1-hamzamahfooz@linux.microsoft.com> No version number in the subject? Please next time follow https://docs.kernel.org/process/submitting-patches.html#subject-line Common tags might include a version descriptor if the multiple versions of the patch have been sent out in response to comments (i.e., “v1, v2, v3”), or “RFC” to indicate a request for comments. On Tue, Apr 28, 2026 at 08:53:39AM -0400, Hamza Mahfooz wrote: >VMBUS ring buffers must be page aligned. Therefore, the current value of >24K presents a challenge on ARM64 kernels (with 64K pages). So, use >VMBUS_RING_SIZE() to ensure they are always aligned and large enough to >hold all of the relevant data. > >Cc: stable@vger.kernel.org >Fixes: 77ffe33363c0 ("hv_sock: use HV_HYP_PAGE_SIZE for Hyper-V communication") >Tested-by: Dexuan Cui >Reviewed-by: Dexuan Cui >Signed-off-by: Hamza Mahfooz >--- > net/vmw_vsock/hyperv_transport.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) Acked-by: Stefano Garzarella > >diff --git a/net/vmw_vsock/hyperv_transport.c b/net/vmw_vsock/hyperv_transport.c >index 069386a74557..40f09b23efa3 100644 >--- a/net/vmw_vsock/hyperv_transport.c >+++ b/net/vmw_vsock/hyperv_transport.c >@@ -375,10 +375,10 @@ static void hvs_open_connection(struct vmbus_channel *chan) > } else { > sndbuf = max_t(int, sk->sk_sndbuf, RINGBUFFER_HVS_SND_SIZE); > sndbuf = min_t(int, sndbuf, RINGBUFFER_HVS_MAX_SIZE); >- sndbuf = ALIGN(sndbuf, HV_HYP_PAGE_SIZE); >+ sndbuf = VMBUS_RING_SIZE(sndbuf); > rcvbuf = max_t(int, sk->sk_rcvbuf, RINGBUFFER_HVS_RCV_SIZE); > rcvbuf = min_t(int, rcvbuf, RINGBUFFER_HVS_MAX_SIZE); >- rcvbuf = ALIGN(rcvbuf, HV_HYP_PAGE_SIZE); >+ rcvbuf = VMBUS_RING_SIZE(rcvbuf); > } > > chan->max_pkt_size = HVS_MAX_PKT_SIZE; >-- >2.54.0 >