Chuck Lever cace564f8b svcrdma: Tail iovec leaves an orphaned DMA mapping ... The ctxt's count field is overloaded to mean the number of pages in the ctxt->page array and the number of SGEs in the ctxt->sge array. Typically these two numbers are the same. However, when an inline RPC reply is constructed from an xdr_buf with a tail iovec, the head and tail often occupy the same page, but each are DMA mapped independently. In that case, ->count equals the number of pages, but it does not equal the number of SGEs. There's one more SGE, for the tail iovec. Hence there is one more DMA mapping than there are pages in the ctxt->page array. This isn't a real problem until the server's iommu is enabled. Then each RPC reply that has content in that iovec orphans a DMA mapping that consists of real resources. krb5i and krb5p always populate that tail iovec. After a couple million sent krb5i/p RPC replies, the NFS server starts behaving erratically. Reboot is needed to clear the problem. Fixes: 9d11b51ce7 ("svcrdma: Fix send_reply() scatter/gather set-up") Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>		2016-09-23 10:18:52 -04:00
..
6lowpan	6lowpan: ndisc: set invalid unicast short addr to unspec	2016-07-08 13:23:12 +02:00
9p	9p/trans_virtio: use kvfree() for iov_iter_get_pages_alloc()	2016-08-09 13:42:36 +03:00
802	…
8021q	net: remove type_check from dev_get_nest_level()	2016-08-13 15:15:54 -07:00
appletalk	…
atm	net: add dev arg to ndo_neigh_construct/destroy	2016-07-05 09:06:28 -07:00
ax25	AX.25: Close socket connection on session completion	2016-06-18 20:55:34 -07:00
batman-adv	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2016-07-24 00:53:32 -04:00
bluetooth	Bluetooth: Fix hci_sock_recvmsg when MSG_TRUNC is not set	2016-08-25 20:58:47 +02:00
bridge	bridge: Fix problems around fdb entries pointing to the bridge device	2016-08-09 21:42:44 -07:00
caif	caif: Remove unneeded header file	2016-06-28 05:26:14 -04:00
can	can: only call can_stat_update with procfs	2016-06-23 11:23:49 +02:00
ceph	libceph: using kfree_rcu() to simplify the code	2016-08-08 21:41:42 +02:00
core	net: remove type_check from dev_get_nest_level()	2016-08-13 15:15:54 -07:00
dcb	…
dccp	Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security	2016-07-29 17:38:46 -07:00
decnet	net: fix decnet rtnexthop parsing	2016-07-05 14:08:47 -07:00
dns_resolver	KEYS: Add a facility to restrict new links into a keyring	2016-04-11 22:37:37 +01:00
dsa	net: dsa: support switchdev ageing time attr	2016-07-19 19:42:01 -07:00
ethernet	…
hsr	net/hsr: Use setup_timer and mod_timer.	2016-05-16 14:00:43 -04:00
ieee802154	ieee802154: 6lowpan: fix intra pan id check	2016-07-08 13:23:12 +02:00
ipv4	net: diag: Fix refcnt leak in error path destroying socket	2016-08-23 23:11:36 -07:00
ipv6	udp: get rid of SLAB_DESTROY_BY_RCU allocations	2016-08-23 17:46:17 -07:00
ipx	…
irda	net/irda: handle iriap_register_lsap() allocation failure	2016-08-13 15:09:07 -07:00
iucv	Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security	2016-07-29 17:38:46 -07:00
kcm	kcm: remove redundant -ve error check and return path	2016-07-25 11:17:16 -07:00
key	…
l2tp	l2tp: Fix the connect status check in pppol2tp_getname	2016-08-19 17:55:43 -07:00
l3mdev	net: vrf: Implement get_saddr for IPv6	2016-06-17 21:25:29 -07:00
lapb	net/lapb: tuse %*ph to dump buffers	2016-05-29 22:33:25 -07:00
llc	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2016-05-09 15:59:24 -04:00
mac80211	mac80211: Add ieee80211_hw pointer to get_expected_throughput	2016-08-05 14:23:25 +02:00
mac802154	…
mpls	mpls: allow routes on ipip and sit devices	2016-07-09 17:45:56 -04:00
ncsi	net/ncsi: avoid maybe-uninitialized warning	2016-07-25 10:32:59 -07:00
netfilter	netfilter: cttimeout: fix use after free error when delete netns	2016-08-18 15:17:00 +02:00
netlabel	netlabel: Implement CALIPSO config functions for SMACK.	2016-06-27 15:06:18 -04:00
netlink	net/netlink/af_netlink.h: Remove unused structure.	2016-06-09 22:26:24 -07:00
netrom	…
nfc	NFC: digital: Fix RTOX supervisor PDU handling	2016-07-11 02:02:03 +02:00
openvswitch	openvswitch: do not ignore netdev errors when creating tunnel vports	2016-08-10 23:13:23 -07:00
packet	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2016-07-24 00:53:32 -04:00
phonet	…
qrtr	Merge tag 'qcom-soc-for-4.7-2' into net-next	2016-05-17 14:11:19 -04:00
rds	RDS: TCP: Enable multipath RDS for TCP	2016-07-15 11:36:58 -07:00
rfkill	…
rose	rose: limit sk_filter trim to payload	2016-07-13 11:53:40 -07:00
rxrpc	rxrpc: Free packets discarded in data_ready	2016-08-09 17:13:56 +01:00
sched	qdisc: fix a module refcount leak in qdisc_create_dflt()	2016-08-25 16:44:20 -07:00
sctp	sctp: fix overrun in sctp_diag_dump_one()	2016-08-23 17:22:53 -07:00
sunrpc	svcrdma: Tail iovec leaves an orphaned DMA mapping	2016-09-23 10:18:52 -04:00
switchdev	net/switchdev: Export the same parent ID service function	2016-07-14 13:34:29 -07:00
tipc	tipc: fix the error handling in tipc_udp_enable()	2016-08-25 16:32:34 -07:00
unix	af_unix: charge buffers to kmemcg	2016-07-26 16:19:19 -07:00
vmw_vsock	vhost/vsock: drop space available check for TX vq	2016-08-15 05:05:21 +03:00
wimax	…
wireless	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2016-08-17 17:26:58 -07:00
x25	net: fix a kernel infoleak in x25 module	2016-05-09 22:45:33 -04:00
xfrm	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2016-05-09 15:59:24 -04:00
Kconfig	net/ncsi: Resource management	2016-07-19 20:49:16 -07:00
Makefile	net/ncsi: Resource management	2016-07-19 20:49:16 -07:00
compat.c	packet: compat support for sock_fprog	2016-06-09 23:41:03 -07:00
socket.c	fs: poll/select/recvmmsg: use timespec64 for timeout events	2016-05-19 19:12:14 -07:00
sysctl_net.c	net: Use ns_capable_noaudit() when determining net sysctl permissions	2016-06-06 20:16:22 +10:00