Longer term teach dax to punch "error" holes in mapping requests and deliver SIGBUS to applications that consume a bad pmem page. For now, simply disable the dax performance optimization in the presence of known errors. Signed-off-by: Dan Williams <dan.j.williams@xxxxxxxxx> --- block/ioctl.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/block/ioctl.c b/block/ioctl.c index 7a964d842913..46e8cbe469d8 100644 --- a/block/ioctl.c +++ b/block/ioctl.c @@ -422,6 +422,15 @@ bool blkdev_dax_capable(struct block_device *bdev) || (bdev->bd_part->nr_sects % (PAGE_SIZE / 512))) return false; + /* + * If the device has known bad blocks, force all I/O through the + * driver / page cache. + * + * TODO: support finer grained dax error handling + */ + if (disk->bb) + return false; + return true; } -- To unsubscribe from this list: send the line "unsubscribe linux-block" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
