Hi list, I have an application that needs to use buffered_io to access SMR disk for good performance. >From "ZBD Support Restrictions" at https://zonedstorage.io/docs/linux/overview " Direct IO Writes The kernel page cache does not guarantee that cached dirty pages will be flushed to a block device in sequential sector order. This can lead to unaligned write errors if an application uses buffered writes to write to the sequential write required zones of a device. To avoid this pitfall, applications that directly use a zoned block device without a file system should always use direct I/O operations to write to the sequential write required zones of a host-managed disk (that is, they should issue write() system calls with a block device "file open" that uses the O_DIRECT flag). " Raw zbd disk only supports direct_io. Does dm-zoned support buffered io (without O_DIRECT)? Thanks, Ming -- dm-devel mailing list dm-devel@xxxxxxxxxx https://listman.redhat.com/mailman/listinfo/dm-devel
