On Fri, Sep 03, 2021 at 01:28:02PM +0300, Vladimir Sementsov-Ogievskiy wrote: > We are going to support 64 bit write-zeroes requests. Now update the > limit variable. It's absolutely safe. The variable is set in some > drivers, and used in bdrv_co_do_pwrite_zeroes(). > > Update also max_write_zeroes variable in bdrv_co_do_pwrite_zeroes(), so > that bdrv_co_do_pwrite_zeroes() is now prepared to 64bit requests. The > remaining logic including num, offset and bytes variables is already > supporting 64bit requests. > > So the only thing that prevents 64 bit requests is limiting > max_write_zeroes variable to INT_MAX in bdrv_co_do_pwrite_zeroes(). > We'll drop this limitation after updating all block drivers. > > Ah, we also have bdrv_check_request32() in bdrv_co_pwritev_part(). It > will be modified to do bdrv_check_request() for write-zeroes path. > > Signed-off-by: Vladimir Sementsov-Ogievskiy <vsement...@virtuozzo.com> > --- > include/block/block_int.h | 9 +++++---- > block/io.c | 2 +- > 2 files changed, 6 insertions(+), 5 deletions(-)
Reviewed-by: Eric Blake <ebl...@redhat.com> -- Eric Blake, Principal Software Engineer Red Hat, Inc. +1-919-301-3266 Virtualization: qemu.org | libvirt.org
