tree 543a2d483a1110f9666ae5503d9e3c53a8782e0c
parent 1cef4659850eeb862c248c7670e404d7a1711ed1
author Or Gerlitz <ogerlitz@voltaire.com> 1265635062 +0000
committer Roland Dreier <rolandd@cisco.com> 1267033270 -0800

IB/iser: New receive buffer posting logic

Currently, the recv buffer posting logic is based on the transactional
nature of iSER which allows for posting a buffer before sending a PDU.
Change this to post only when the number of outstanding recv buffers
is below a water mark and in a batched manner, thus simplifying and
optimizing the data path.  Use a pre-allocated ring of recv buffers
instead of allocating from kmem cache.  A special treatment is given
to the login response buffer whose size must be 8K unlike the size of
buffers used for any other purpose which is 128 bytes.

Signed-off-by: Or Gerlitz <ogerlitz@voltaire.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>