Commit graph

7 commits

Author SHA1 Message Date
Trond Myklebust
ac20d163fc NFSv4.1: Deal effectively with interrupted RPC calls.
If an RPC call is interrupted, assume that the server hasn't processed
the RPC call so that the next time we use the slot, we know that if we
get a NFS4ERR_SEQ_MISORDERED or NFS4ERR_SEQ_FALSE_RETRY, we just have
to bump the sequence number.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-12-15 15:39:59 -05:00
Trond Myklebust
8e63b6a8ad NFSv4.1: Move the RPC timestamp out of the slot.
Shave a few bytes off the slot table size by moving the RPC timestamp
into the sequence results.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-12-15 15:21:52 -05:00
Trond Myklebust
1fa8064429 NFSv4.1: Try to eliminate outliers when updating target_highest_slotid
Look for sudden changes in the first and second derivatives in order
to eliminate outlier changes to target_highest_slotid (which are
due to out-of-order RPC replies).

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-12-06 00:30:53 +01:00
Trond Myklebust
b75ad4cda5 NFSv4.1: Ensure smooth handover of slots from one task to the next waiting
Currently, we see a lot of bouncing for the value of highest_used_slotid
due to the fact that slots are getting freed, instead of getting instantly
transmitted to the next waiting task.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-12-06 00:30:52 +01:00
Trond Myklebust
0ca3f4825a NFSv4.1: Set the maximum slot table size to 1024 slots
This means that we end up statically allocating 128 bytes for the
bitmap on each slot table.
For a server that supports 1MB write and read I/O sizes this means
that we can completely fill the maximum 1GB TCP send/receive
windows.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-12-06 00:30:47 +01:00
Trond Myklebust
76e697ba7e NFSv4.1: Move slot table and session struct definitions to nfs4session.h
Clean up. Gather NFSv4.1 slot definitions in fs/nfs/nfs4session.h.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-12-06 00:30:46 +01:00
Trond Myklebust
73e39aaa83 NFSv4.1: Cleanup move session slot management to fs/nfs/nfs4session.c
NFSv4.1 session management is getting complex enough to deserve
a separate file.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-12-06 00:30:45 +01:00