On 1.09.21 г. 20:01, Omar Sandoval wrote: > From: Omar Sandoval <osandov@xxxxxx> > > The length field of the send stream TLV header is 16 bits. This means > that the maximum amount of data that can be sent for one write is 64k > minus one. However, encoded writes must be able to send the maximum > compressed extent (128k) in one command. To support this, send stream > version 2 encodes the DATA attribute differently: it has no length > field, and the length is implicitly up to the end of containing command > (which has a 32-bit length field). Although this is necessary for > encoded writes, normal writes can benefit from it, too. > > For v2, let's bump up the send buffer to the maximum compressed extent > size plus 16k for the other metadata (144k total). Since this will most > likely be vmalloc'd (and always will be after the next commit), we round > it up to the next page since we might as well use the rest of the page > on systems with >16k pages. > > Signed-off-by: Omar Sandoval <osandov@xxxxxx> Reviewed-by: Nikolay Borisov <nborisov@xxxxxxxx>
