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d="scan'208";a="103413673" To: CC: , , Mark Syms Subject: [PATCH] Ensure the PV ring is drained on disconnect Date: Wed, 29 Mar 2023 11:53:44 +0100 Message-ID: <20230329105344.3465706-2-mark.syms@citrix.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230329105344.3465706-1-mark.syms@citrix.com> References: <20230329105344.3465706-1-mark.syms@citrix.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=216.71.145.153; envelope-from=prvs=4450486d3=Mark.Syms@citrix.com; helo=esa2.hc3370-68.iphmx.com X-Spam_score_int: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-Mailman-Approved-At: Wed, 29 Mar 2023 09:08:07 -0400 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-to: Mark Syms From: Mark Syms via Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZM-MESSAGEID: 1680095318327100013 Content-Type: text/plain; charset="utf-8" Also ensure all pending AIO is complete. Signed-off-by: Mark Syms --- hw/block/dataplane/xen-block.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/hw/block/dataplane/xen-block.c b/hw/block/dataplane/xen-block.c index 734da42ea7..067f8e2f45 100644 --- a/hw/block/dataplane/xen-block.c +++ b/hw/block/dataplane/xen-block.c @@ -523,6 +523,10 @@ static bool xen_block_handle_requests(XenBlockDataPlan= e *dataplane) =20 dataplane->more_work =3D 0; =20 + if (dataplane->sring =3D=3D 0) { + return done_something; + } + rc =3D dataplane->rings.common.req_cons; rp =3D dataplane->rings.common.sring->req_prod; xen_rmb(); /* Ensure we see queued requests up to 'rp'. */ @@ -666,11 +670,23 @@ void xen_block_dataplane_destroy(XenBlockDataPlane *d= ataplane) void xen_block_dataplane_stop(XenBlockDataPlane *dataplane) { XenDevice *xendev; + XenBlockRequest *request, *next; =20 if (!dataplane) { return; } =20 + /* Ensure we have drained the ring */ + do { + xen_block_handle_requests(dataplane); + } while (dataplane->more_work); + + /* Now ensure that all inflight requests are complete */ + QLIST_FOREACH_SAFE(request, &dataplane->inflight, list, next) { + blk_aio_flush(request->dataplane->blk, xen_block_complete_aio, + request); + } + xendev =3D dataplane->xendev; =20 aio_context_acquire(dataplane->ctx); --=20 2.39.2