On 10/21/2021 4:23 AM, Christoph Hellwig wrote:

On Wed, Oct 20, 2021 at 06:10:56PM -0600, Jane Chu wrote:

quoted

-	if (unlikely(is_bad_pmem(&pmem->bb, PFN_PHYS(pgoff) / 512,
-					PFN_PHYS(nr_pages))))
+	if (unlikely(!(flags & DAXDEV_F_RECOVERY) &&
+		is_bad_pmem(&pmem->bb, PFN_PHYS(pgoff) / 512,
+				PFN_PHYS(nr_pages))))

The indentation here is pretty messed up. Something like this would
be move normal:

	if (unlikely(!(flags & DAXDEV_F_RECOVERY) &&
			is_bad_pmem(&pmem->bb, PFN_PHYS(pgoff) / 512,
				    PFN_PHYS(nr_pages)))) {

Will do.

but if we don't really need the unlikely we could do an actually
readable variant:

	if (!(flags & DAXDEV_F_RECOVERY) &&
	    is_bad_pmem(&pmem->bb, PFN_PHYS(pgoff) / 512, PFN_PHYS(nr_pages)))

'unlikely' is needed because 'RWF_RECOVERY_DATA' flag is not
recommended for normal preadv2/pwritev2 usage, it's recommended
only if user is aware of or suspect poison in the range.

thanks,
-jane