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bh=mLpAPhOLexRIuQHAy6nH/DLSJaRi5up7/+uWx1QOq3Y=; b=SHHzbMwoLEUWHauPg8t3ZcmNR0qy5WA54120xvi+Q/A2RJXYP0cIzOMUlqXlO8/uz4zT3O scVLY7N1K1S0WZTwZnEMlDjYiptSgyaSbl/Lh/p+d3KcSm/Ea+wLSg/D6Q+eic9+9iwnls ES6DOh05yPoY0R6kx2mFqQW6Z81oAJc= X-MC-Unique: qMZVZiXKN-KeHB0bXhtY1A-1 From: Stefan Hajnoczi To: qemu-devel@nongnu.org, Kevin Wolf Cc: Juan Quintela , Vladimir Sementsov-Ogievskiy , pbonzini@redhat.com, Peter Xu , qemu-block@nongnu.org, Hanna Reitz , Fabiano Rosas , Leonardo Bras , Eric Blake , Stefan Hajnoczi , Fam Zheng Subject: [PATCH v3 2/6] fixup block: remove AioContext locking Date: Thu, 21 Dec 2023 14:24:48 -0500 Message-ID: <20231221192452.1785567-3-stefanha@redhat.com> In-Reply-To: <20231221192452.1785567-1-stefanha@redhat.com> References: <20231221192452.1785567-1-stefanha@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.3 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=170.10.133.124; envelope-from=stefanha@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -21 X-Spam_score: -2.2 X-Spam_bar: -- X-Spam_report: (-2.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.061, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01, T_SPF_HELO_TEMPERROR=0.01 autolearn=unavailable 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: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1703186760835100002 Content-Type: text/plain; charset="utf-8" Signed-off-by: Stefan Hajnoczi --- migration/block.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/migration/block.c b/migration/block.c index 2bcfcbfdf6..6ec6a1d6e6 100644 --- a/migration/block.c +++ b/migration/block.c @@ -311,10 +311,17 @@ static int mig_save_device_bulk(QEMUFile *f, BlkMigDe= vState *bmds) block_mig_state.submitted++; blk_mig_unlock(); =20 + /* + * The migration thread does not have an AioContext. Lock the BQL so t= hat + * I/O runs in the main loop AioContext (see + * qemu_get_current_aio_context()). + */ + qemu_mutex_lock_iothread(); bdrv_reset_dirty_bitmap(bmds->dirty_bitmap, cur_sector * BDRV_SECTOR_S= IZE, nr_sectors * BDRV_SECTOR_SIZE); blk->aiocb =3D blk_aio_preadv(bb, cur_sector * BDRV_SECTOR_SIZE, &blk-= >qiov, 0, blk_mig_read_cb, blk); + qemu_mutex_unlock_iothread(); =20 bmds->cur_sector =3D cur_sector + nr_sectors; return (bmds->cur_sector >=3D total_sectors); --=20 2.43.0