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bdrv_qiov_is_aligned
2013 May 24
0
Re: [Qemu-devel] use O_DIRECT to open disk images for IDE failed under xen-4.1.2 and qemu upstream
...uffer needs to be aligned on a sector
> > > * boundary. Check if this is the case or tell the low-level
> > > * driver that it needs to copy the buffer.
> > > */
> > > if ((bs->open_flags & BDRV_O_NOCACHE)) {
> > > if (!bdrv_qiov_is_aligned(bs, qiov)) { //if the address is
> > aligned-512, will no meet the conditions
> > > type |= QEMU_AIO_MISALIGNED;
> > > #ifdef CONFIG_LINUX_AIO
> > > } else if (s->use_aio) {
> > > return laio_submit(bs, s->aio_ctx,...