Re: [PATCH v4 2/4] block/nbd: define new max_write_zero_fast limit

2020-09-10 Thread Vladimir Sementsov-Ogievskiy
23.07.2020 23:32, Eric Blake wrote: On 6/11/20 11:26 AM, Vladimir Sementsov-Ogievskiy wrote: The NBD spec was recently updated to clarify that max_block doesn't relate to NBD_CMD_WRITE_ZEROES with NBD_CMD_FLAG_FAST_ZERO (which mirrors Qemu flag BDRV_REQ_NO_FALLBACK). bs->bl.max_write_zero_fast

Re: [PATCH v4 2/4] block/nbd: define new max_write_zero_fast limit

2020-07-23 Thread Eric Blake
On 6/11/20 11:26 AM, Vladimir Sementsov-Ogievskiy wrote: The NBD spec was recently updated to clarify that max_block doesn't relate to NBD_CMD_WRITE_ZEROES with NBD_CMD_FLAG_FAST_ZERO (which mirrors Qemu flag BDRV_REQ_NO_FALLBACK). bs->bl.max_write_zero_fast is zero by default which means using

[PATCH v4 2/4] block/nbd: define new max_write_zero_fast limit

2020-06-11 Thread Vladimir Sementsov-Ogievskiy
The NBD spec was recently updated to clarify that max_block doesn't relate to NBD_CMD_WRITE_ZEROES with NBD_CMD_FLAG_FAST_ZERO (which mirrors Qemu flag BDRV_REQ_NO_FALLBACK). bs->bl.max_write_zero_fast is zero by default which means using max_pwrite_zeroes. Update nbd driver to allow larger