From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:46052) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aBIii-0001kP-Uz for qemu-devel@nongnu.org; Tue, 22 Dec 2015 03:55:01 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1aBIii-0007a7-1I for qemu-devel@nongnu.org; Tue, 22 Dec 2015 03:55:00 -0500 Received: from mx1.redhat.com ([209.132.183.28]:52899) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aBIih-0007a1-SG for qemu-devel@nongnu.org; Tue, 22 Dec 2015 03:54:59 -0500 From: Stefan Hajnoczi Date: Tue, 22 Dec 2015 16:54:15 +0800 Message-Id: <1450774460-17259-6-git-send-email-stefanha@redhat.com> In-Reply-To: <1450774460-17259-1-git-send-email-stefanha@redhat.com> References: <1450774460-17259-1-git-send-email-stefanha@redhat.com> Subject: [Qemu-devel] [PULL 05/10] block/mirror: replace IOV_MAX with blk_get_max_iov() List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Peter Maydell , Stefan Hajnoczi Use blk_get_max_iov() instead of hardcoding IOV_MAX, which may not apply to all BlockDrivers. Signed-off-by: Stefan Hajnoczi --- block/mirror.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/block/mirror.c b/block/mirror.c index fc34a9c..f201f2b 100644 --- a/block/mirror.c +++ b/block/mirror.c @@ -161,13 +161,15 @@ static void mirror_read_complete(void *opaque, int ret) static uint64_t coroutine_fn mirror_iteration(MirrorBlockJob *s) { BlockDriverState *source = s->common.bs; - int nb_sectors, sectors_per_chunk, nb_chunks; + int nb_sectors, sectors_per_chunk, nb_chunks, max_iov; int64_t end, sector_num, next_chunk, next_sector, hbitmap_next_sector; uint64_t delay_ns = 0; MirrorOp *op; int pnum; int64_t ret; + max_iov = MIN(source->bl.max_iov, s->target->bl.max_iov); + s->sector_num = hbitmap_iter_next(&s->hbi); if (s->sector_num < 0) { bdrv_dirty_iter_init(s->dirty_bitmap, &s->hbi); @@ -248,7 +250,7 @@ static uint64_t coroutine_fn mirror_iteration(MirrorBlockJob *s) trace_mirror_break_buf_busy(s, nb_chunks, s->in_flight); break; } - if (IOV_MAX < nb_chunks + added_chunks) { + if (max_iov < nb_chunks + added_chunks) { trace_mirror_break_iov_max(s, nb_chunks, added_chunks); break; } -- 2.5.0