Naohiro/Johannes, > Add bio_add_zone_append_page(), a wrapper around bio_add_hw_page() which > is intended to be used by file systems that directly add pages to a bio > instead of using bio_iov_iter_get_pages(). Why use the hardware limit? For filesystem I/O we generally use the queue soft limit to prevent I/Os getting too big which can lead to very unpredictable latency in mixed workloads. max_zone_append_sectors also appears to be gated exclusively by hardware constraints. Is there user-controllable limit in place for append operations? -- Martin K. Petersen Oracle Linux Engineering
