On 06/03/2016 11:49 AM, Eric Blake wrote: > On 06/03/2016 11:03 AM, Eric Blake wrote: >> It makes more sense to have ALL block size limit constraints >> in the same struct. Improve the documentation while at it. >> >> Note that bdrv_refresh_limits() has to keep things alive across >> a memset() of BlockLimits. >> >> Signed-off-by: Eric Blake <[email protected]> >> --- >> include/block/block_int.h | 12 ++++++++---- >> block.c | 4 ++-- >> block/blkdebug.c | 4 ++-- >> block/bochs.c | 2 +- >> block/cloop.c | 2 +- >> block/dmg.c | 2 +- >> block/io.c | 12 +++++++----- >> block/iscsi.c | 2 +- >> block/raw-posix.c | 16 ++++++++-------- >> block/raw-win32.c | 6 +++--- >> block/vvfat.c | 2 +- >> 11 files changed, 35 insertions(+), 29 deletions(-) > > Something in this patch is causing qemu-iotests 77 to infloop; we may > decide it is just easier to drop this patch rather than find all the > places where the request_alignment must be preserved across what > otherwise zeroes out limits.
Found it; squash this in (or use it as an argument why we don't want
request_alignment in bs->bl after all):
diff --git i/block/raw_bsd.c w/block/raw_bsd.c
index b1d5237..c3c2246 100644
--- i/block/raw_bsd.c
+++ w/block/raw_bsd.c
@@ -152,7 +152,11 @@ static int raw_get_info(BlockDriverState *bs,
BlockDriverInfo *bdi)
static void raw_refresh_limits(BlockDriverState *bs, Error **errp)
{
+ /* Inherit all limits except for request_alignment */
+ int request_alignment = bs->bl.request_alignment;
+
bs->bl = bs->file->bs->bl;
+ bs->bl.request_alignment = request_alignment;
}
static int raw_truncate(BlockDriverState *bs, int64_t offset)
--
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
signature.asc
Description: OpenPGP digital signature
