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  1. 03 1月, 2017 4 次提交
  3. 02 7月, 2016 2 次提交
  5. 19 6月, 2016 1 次提交
  7. 15 6月, 2016 2 次提交
  9. 17 4月, 2016 1 次提交
  11. 03 3月, 2016 3 次提交
  13. 29 10月, 2015 1 次提交
  15. 06 10月, 2015 3 次提交
  17. 31 8月, 2015 1 次提交
  19. 26 8月, 2015 3 次提交
  21. 08 8月, 2015 1 次提交
  23. 13 6月, 2015 1 次提交
  25. 19 5月, 2015 1 次提交
  27. 05 5月, 2015 1 次提交
    • D
      net/rds: Fix new sparse warning · e2783717
      由 David Ahern 提交于 
      c0adf54a introduced new sparse warnings:
  CHECK   /home/dahern/kernels/linux.git/net/rds/ib_cm.c
net/rds/ib_cm.c:191:34: warning: incorrect type in initializer (different base types)
net/rds/ib_cm.c:191:34:    expected unsigned long long [unsigned] [usertype] dp_ack_seq
net/rds/ib_cm.c:191:34:    got restricted __be64 <noident>
net/rds/ib_cm.c:194:51: warning: cast to restricted __be64

The temporary variable for sequence number should have been declared as __be64
rather than u64. Make it so.
Signed-off-by: NDavid Ahern <david.ahern@oracle.com>
Cc: shamir rabinovitch <shamir.rabinovitch@oracle.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      e2783717
  29. 04 5月, 2015 1 次提交
    • S
      net/rds: fix unaligned memory access · c0adf54a
      由 shamir rabinovitch 提交于 
      rdma_conn_param private data is copied using memcpy after headers such
as cma_hdr (see cma_resolve_ib_udp as example). so the start of the
private data is aligned to the end of the structure that come before. if
this structure end with u32 the meaning is that the start of the private
data will be 4 bytes aligned. structures that use u8/u16/u32/u64 are
naturally aligned but in case the structure start is not 8 bytes aligned,
all u64 members of this structure will not be aligned. to solve this issue
we must use special macros that allow unaligned access to those
unaligned members.

Addresses the following kernel log seen when attempting to use RDMA:

Kernel unaligned access at TPC[10507a88] rds_ib_cm_connect_complete+0x1bc/0x1e0 [rds_rdma]
Acked-by: NChien Yen <chien.yen@oracle.com>
Signed-off-by: Nshamir rabinovitch <shamir.rabinovitch@oracle.com>
[Minor tweaks for top of tree by:]
Signed-off-by: NDavid Ahern <david.ahern@oracle.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      c0adf54a
  31. 27 12月, 2012 1 次提交
  33. 23 3月, 2012 1 次提交
  35. 15 9月, 2011 1 次提交
  37. 17 6月, 2011 1 次提交
  39. 26 5月, 2011 1 次提交
    • S
      RDMA/cma: Pass QP type into rdma_create_id() · b26f9b99
      由 Sean Hefty 提交于 
      The RDMA CM currently infers the QP type from the port space selected
by the user.  In the future (eg with RDMA_PS_IB or XRC), there may not
be a 1-1 correspondence between port space and QP type.  For netlink
export of RDMA CM state, we want to export the QP type to userspace,
so it is cleaner to explicitly associate a QP type to an ID.

Modify rdma_create_id() to allow the user to specify the QP type, and
use it to make our selections of datagram versus connected mode.
Signed-off-by: NSean Hefty <sean.hefty@intel.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>
      b26f9b99
  41. 20 9月, 2010 1 次提交
  43. 09 9月, 2010 8 次提交
    • Z
      RDS/IB: print string constants in more places · 59f740a6
      由 Zach Brown 提交于 
      This prints the constant identifier for work completion status and rdma
cm event types, like we already do for IB event types.

A core string array helper is added that each string type uses.
Signed-off-by: NZach Brown <zach.brown@oracle.com>
      59f740a6
    • Z
      RDS/IB: print IB event strings as well as their number · 1bde04a6
      由 Zach Brown 提交于 
      It's nice to not have to go digging in the code to see which event
occurred.  It's easy to throw together a quick array that maps the ib
event enums to their strings.  I didn't see anything in the stack that
does this translation for us, but I also didn't look very hard.
Signed-off-by: NZach Brown <zach.brown@oracle.com>
      1bde04a6
    • Z
      RDS/IB: track signaled sends · f046011c
      由 Zach Brown 提交于 
      We're seeing bugs today where IB connection shutdown clears the send
ring while the tasklet is processing completed sends.  Implementation
details cause this to dereference a null pointer.  Shutdown needs to
wait for send completion to stop before tearing down the connection.  We
can't simply wait for the ring to empty because it may contain
unsignaled sends that will never be processed.

This patch tracks the number of signaled sends that we've posted and
waits for them to complete.  It also makes sure that the tasklet has
finished executing.
Signed-off-by: NZach Brown <zach.brown@oracle.com>
      f046011c
    • C
      RDS/IB: Add caching of frags and incs · 33244125
      由 Chris Mason 提交于 
      This patch is based heavily on an initial patch by Chris Mason.
Instead of freeing slab memory and pages, it keeps them, and
funnels them back to be reused.

The lock minimization strategy uses xchg and cmpxchg atomic ops
for manipulation of pointers to list heads. We anchor the lists with a
pointer to a list_head struct instead of a static list_head struct.
We just have to carefully use the existing primitives with
the difference between a pointer and a static head struct.

For example, 'list_empty()' means that our anchor pointer points to a list with
a single item instead of meaning that our static head element doesn't point to
any list items.

Original patch by Chris, with significant mods and fixes by Andy and Zach.
Signed-off-by: NChris Mason <chris.mason@oracle.com>
Signed-off-by: NAndy Grover <andy.grover@oracle.com>
Signed-off-by: NZach Brown <zach.brown@oracle.com>
      33244125
    • Z
      RDS/IB: add refcount tracking to struct rds_ib_device · 3e0249f9
      由 Zach Brown 提交于 
      The RDS IB client .remove callback used to free the rds_ibdev for the given
device unconditionally.  This could race other users of the struct.  This patch
adds refcounting so that we only free the rds_ibdev once all of its users are
done.

Many rds_ibdev users are tied to connections.  We give the connection a
reference and change these users to reference the device in the connection
instead of looking it up in the IB client data.  The only user of the IB client
data remaining is the first lookup of the device as connections are built up.

Incrementing the reference count of a device found in the IB client data could
race with final freeing so we use an RCU grace period to make sure that freeing
won't happen until those lookups are done.

MRs need the rds_ibdev to get at the pool that they're freed in to.  They exist
outside a connection and many MRs can reference different devices from one
socket, so it was natural to have each MR hold a reference.  MR refs can be
dropped from interrupt handlers and final device teardown can block so we push
it off to a work struct.  Pool teardown had to be fixed to cancel its pending
work instead of deadlocking waiting for all queued work, including itself, to
finish.

MRs get their reference from the global device list, which gets a reference.
It is left unprotected by locks and remains racy.  A simple global lock would
be a significant bottleneck.  More scalable (complicated) locking should be
done carefully in a later patch.
Signed-off-by: NZach Brown <zach.brown@oracle.com>
      3e0249f9
    • Z
      RDS/IB: rds_ib_cm_handle_connect() forgot to unlock c_cm_lock · a46ca94e
      由 Zach Brown 提交于 
      rds_ib_cm_handle_connect() could return without unlocking the c_conn_lock if
rds_setup_qp() failed.  Rather than adding another imbalanced mutex_unlock() to
this error path we only unlock the mutex once as we exit the function, reducing
the likelyhood of making this same mistake in the future.  We remove the
previous mulitple return sites, leaving one unambigious return path.
Signed-off-by: NZach Brown <zach.brown@oracle.com>
      a46ca94e
    • A
      RDS/IB: add _to_node() macros for numa and use {k,v}malloc_node() · e4c52c98
      由 Andy Grover 提交于 
      Allocate send/recv rings in memory that is node-local to the HCA.
This significantly helps performance.
Signed-off-by: NAndy Grover <andy.grover@oracle.com>
      e4c52c98
    • A
      RDS: Refill recv ring directly from tasklet · f17a1a55
      由 Andy Grover 提交于 
      Performance is better if we use allocations that don't block
to refill the receive ring. Since the whole reason we were
kicking out to the worker thread was so we could do blocking
allocs, we no longer need to do this.

Remove gfp params from rds_ib_recv_refill(); we always use
GFP_NOWAIT.
Signed-off-by: NAndy Grover <andy.grover@oracle.com>
      f17a1a55