Chuck Lever 737af93c3d xprtrdma: Reduce required number of send SGEs ...

commit 16f906d66c upstream.

The MAX_SEND_SGES check introduced in commit 655fec6987
("xprtrdma: Use gathered Send for large inline messages") fails
for devices that have a small max_sge.

Instead of checking for a large fixed maximum number of SGEs,
check for a minimum small number. RPC-over-RDMA will switch to
using a Read chunk if an xdr_buf has more pages than can fit in
the device's max_sge limit. This is considerably better than
failing all together to mount the server.

This fix supports devices that have as few as three send SGEs
available.

Reported-by: Selvin Xavier <selvin.xavier@broadcom.com>
Reported-by: Devesh Sharma <devesh.sharma@broadcom.com>
Reported-by: Honggang Li <honli@redhat.com>
Reported-by: Ram Amrani <Ram.Amrani@cavium.com>
Fixes: 655fec6987 ("xprtrdma: Use gathered Send for large ...")
Tested-by: Honggang Li <honli@redhat.com>
Tested-by: Ram Amrani <Ram.Amrani@cavium.com>
Tested-by: Steve Wise <swise@opengridcomputing.com>
Reviewed-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2017-03-12 06:44:20 +01:00

..

auth_gss

svcrpc: fix oops in absence of krb5 module

2017-01-31 12:29:24 -05:00

xprtrdma

xprtrdma: Reduce required number of send SGEs

2017-03-12 06:44:20 +01:00

addr.c

replace strict_strto calls

2014-07-12 18:45:49 -04:00

auth_generic.c

Merge tag 'nfs-for-4.9-1' of git://git.linux-nfs.org/projects/anna/linux-nfs

2016-10-13 21:28:20 -07:00

auth_null.c

sunrpc: move NO_CRKEY_TIMEOUT to the auth->au_flags

2016-07-19 16:23:24 -04:00

auth_unix.c

Merge tag 'nfs-for-4.9-1' of git://git.linux-nfs.org/projects/anna/linux-nfs

2016-10-13 21:28:20 -07:00

auth.c

sunrpc: replace generic auth_cred hash with auth-specific function

2016-09-30 15:47:47 -04:00

backchannel_rqst.c

SUNRPC: Refactor rpc_xdr_buf_init()

2016-09-19 13:08:37 -04:00

cache.c

Replace <asm/uaccess.h> with <linux/uaccess.h> globally

2016-12-24 11:46:01 -08:00

clnt.c

SUNRPC: cleanup ida information when removing sunrpc module

2017-01-24 15:29:24 -05:00

debugfs.c

SUNRPC: Address kbuild warning in net/sunrpc/debugfs.c

2015-06-11 14:01:06 -04:00

Kconfig

rpcrdma: Merge svcrdma and xprtrdma modules into one

2015-06-04 16:56:02 -04:00

Makefile

SUNRPC: Add a structure to track multiple transports

2016-02-05 18:48:54 -05:00

netns.h

netns: make struct pernet_operations::id unsigned int

2016-11-18 10:59:15 -05:00

rpc_pipe.c

fs: Replace CURRENT_TIME with current_time() for inode timestamps

2016-09-27 21:06:21 -04:00

rpcb_clnt.c

SUNRPC: Use the multipath iterator to assign a transport to each task

2016-02-05 18:48:55 -05:00

sched.c

SUNRPC: Separate buffer pointers for RPC Call and Reply messages

2016-09-19 13:08:37 -04:00

socklib.c

sunrpc: do not pull udp headers on receive

2016-04-11 15:31:33 -04:00

stats.c

SUNRPC: Proper metric accounting when RPC is not transmitted

2016-11-29 16:45:44 -05:00

sunrpc_syms.c

SUNRPC: cleanup ida information when removing sunrpc module

2017-01-24 15:29:24 -05:00

sunrpc.h

SUNRPC: track whether a request is coming from a loop-back interface.

2014-05-22 15:59:18 -04:00

svc_xprt.c

sunrpc: don't call sleeping functions from the notifier block callbacks

2017-01-12 15:56:40 -05:00

svc.c

svcauth_gss: Close connection when dropping an incoming message

2016-11-30 17:31:11 -05:00

svcauth_unix.c

cred: simpler, 1D supplementary groups

2016-10-07 18:46:30 -07:00

svcauth.c

sunrpc: use DEFINE_SPINLOCK()

2016-12-06 14:18:30 -05:00

svcsock.c

ktime: Get rid of the union

2016-12-25 17:21:22 +01:00

sysctl.c

Replace <asm/uaccess.h> with <linux/uaccess.h> globally

2016-12-24 11:46:01 -08:00

timer.c

…

xdr.c

SUNRPC: Fix setting of buffer length in xdr_set_next_buffer()

2016-09-22 17:17:47 -04:00

xprt.c

sunrpc: Don't engage exponential backoff when connection attempt is rejected.

2016-12-01 17:40:41 -05:00

xprtmultipath.c

SUNRPC search xprt switch for sockaddr

2016-09-19 13:08:36 -04:00

xprtsock.c

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

2016-11-15 10:54:36 -05:00