Re: [PATCH 6/6] nbd: reduce the nbd_index_mutex scope
From: Eric Blake <hidden>
Date: 2021-08-11 15:57:21
On Wed, Aug 11, 2021 at 02:44:28PM +0200, Christoph Hellwig wrote:
nbd_index_mutex is currently held over add_disk and inside ->open, which leads to lock order reversals. Refactor the device creation code path so that nbd_dev_add is called without nbd_index_mutex lock held and only takes it for the IDR insertation.
insertion
Signed-off-by: Christoph Hellwig <hch@lst.de> --- drivers/block/nbd.c | 55 +++++++++++++++++++++++---------------------- 1 file changed, 28 insertions(+), 27 deletions(-)
-- Eric Blake, Principal Software Engineer Red Hat, Inc. +1-919-301-3266 Virtualization: qemu.org | libvirt.org