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Date: Wed, 17 Apr 2024 10:56:34 +0800 Message-Id: <20240417025634.1014582-1-lizhijian@fujitsu.com> X-Mailer: git-send-email 2.31.1 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-TM-AS-GCONF: 00 X-TM-AS-Product-Ver: IMSS-9.1.0.1417-9.0.0.1002-28326.004 X-TM-AS-User-Approved-Sender: Yes X-TMASE-Version: IMSS-9.1.0.1417-9.0.1002-28326.004 X-TMASE-Result: 10-2.135800-10.000000 X-TMASE-MatchedRID: llTo18AJfvGPo+6vQMop+lcgCgDL49aa8nuBtG35YKtZUipC+zHNiopb wG9fIuITrn7hLrBOoti89piuHlsL5yXgtXpCvamunVTWWiNp+v/kwFzTzcgzhN8pqleQItEFHGp 23bat06AatlLuL9E7F+affHI8kAmiCi3dKliN94n/2ZGj3BST5W6SwokDttjb7ZfNcz4VDyv6sR z1g/tlo+LzNWBegCW2wgn7iDBesS0nRE+fI6etkhZuq+P6IbRPm9gOJtZYN6E9wVWfOl9F+r91Q lMzEDW98Q+5/oQ9hDKXVPKFi4MRwQ0oCPUYWO3ctYuBihDMfN1gMgNl5r1I9MBgvHuudtHysNDy bdOqCWh6WkJecb4mO8MYFnUbyvVJ/YPqDH/SjOk= X-TMASE-SNAP-Result: 1.821001.0001-0-1-22:0,33:0,34:0-0 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=139.138.36.223; envelope-from=lizhijian@fujitsu.com; helo=esa9.hc1455-7.c3s2.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, 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-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: Li Zhijian From: Li Zhijian 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: 1713322447585100003 Content-Type: text/plain; charset="utf-8" bdrv_activate_all() should not be called from the coroutine context, move it to the QEMU thread colo_process_incoming_thread() with the bql_lock protected. The backtrace is as follows: #4 0x0000561af7948362 in bdrv_graph_rdlock_main_loop () at ../block/graph= -lock.c:260 #5 0x0000561af7907a68 in graph_lockable_auto_lock_mainloop (x=3D0x7fd2981= 0be7b) at /patch/to/qemu/include/block/graph-lock.h:259 #6 0x0000561af79167d1 in bdrv_activate_all (errp=3D0x7fd29810bed0) at ../= block.c:6906 #7 0x0000561af762b4af in colo_incoming_co () at ../migration/colo.c:935 #8 0x0000561af7607e57 in process_incoming_migration_co (opaque=3D0x0) at = ../migration/migration.c:793 #9 0x0000561af7adbeeb in coroutine_trampoline (i0=3D-106876144, i1=3D2204= 2) at ../util/coroutine-ucontext.c:175 #10 0x00007fd2a5cf21c0 in () at /lib64/libc.so.6 CC: Fabiano Rosas Closes: https://gitlab.com/qemu-project/qemu/-/issues/2277 Fixes: 2b3912f135 ("block: Mark bdrv_first_blk() and bdrv_is_root_node() GR= APH_RDLOCK") Signed-off-by: Li Zhijian Reviewed-by: Fabiano Rosas Reviewed-by: Zhang Chen Tested-by: Zhang Chen --- V2: fix missing bql_unlock() in error path. --- migration/colo.c | 18 ++++++++++-------- 1 file changed, 10 insertions(+), 8 deletions(-) diff --git a/migration/colo.c b/migration/colo.c index 84632a603e..5600a43d78 100644 --- a/migration/colo.c +++ b/migration/colo.c @@ -835,6 +835,16 @@ static void *colo_process_incoming_thread(void *opaque) return NULL; } =20 + /* Make sure all file formats throw away their mutable metadata */ + bql_lock(); + bdrv_activate_all(&local_err); + if (local_err) { + bql_unlock(); + error_report_err(local_err); + return NULL; + } + bql_unlock(); + failover_init_state(); =20 mis->to_src_file =3D qemu_file_get_return_path(mis->from_src_file); @@ -922,7 +932,6 @@ out: int coroutine_fn colo_incoming_co(void) { MigrationIncomingState *mis =3D migration_incoming_get_current(); - Error *local_err =3D NULL; QemuThread th; =20 assert(bql_locked()); @@ -931,13 +940,6 @@ int coroutine_fn colo_incoming_co(void) return 0; } =20 - /* Make sure all file formats throw away their mutable metadata */ - bdrv_activate_all(&local_err); - if (local_err) { - error_report_err(local_err); - return -EINVAL; - } - qemu_thread_create(&th, "COLO incoming", colo_process_incoming_thread, mis, QEMU_THREAD_JOINABLE); =20 --=20 2.31.1