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bh=mLpAPhOLexRIuQHAy6nH/DLSJaRi5up7/+uWx1QOq3Y=; b=emVduDGBYPEEaUKcR9Cz7CPFzRJYG21kyBQH5sOaGfddp35nNluHBId36ORgSevV9Rabk8 20vhAQxsErQoX2AElzX0/DfyBregZzwbW4X63L69gJRi3b/UvmCO5RfJ+uRXaoSk9Pt05W qvdbA9eflzzmaXIQ3hU7+g0wCiptXpo= X-MC-Unique: 9Bjqdhu0OkaVh7I9ctXvmw-1 From: Stefan Hajnoczi To: Kevin Wolf , qemu-devel@nongnu.org Cc: Stefan Hajnoczi , Leonardo Bras , qemu-block@nongnu.org, Fam Zheng , Paolo Bonzini , Vladimir Sementsov-Ogievskiy , Fabiano Rosas , Eric Blake , Hanna Reitz , Juan Quintela , Peter Xu Subject: [PATCH 2/6] fixup block: remove AioContext locking Date: Wed, 20 Dec 2023 20:48:59 -0500 Message-ID: <20231221014903.1537962-3-stefanha@redhat.com> In-Reply-To: <20231221014903.1537962-1-stefanha@redhat.com> References: <20231221014903.1537962-1-stefanha@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.4 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; 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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