- 09 Sep, 2010 3 commits
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Andy Grover authored
This function has been the source of numerous bugs; it's just too complicated. Simplified to nest spinlocks cleanly within the second loop body, and kick out early if there are no rms to drop. This will be a little slower because conn lock is grabbed for each entry instead of "caching" the lock across rms, but this should be entirely irrelevant to fastpath performance. Signed-off-by:Andy Grover <andy.grover@oracle.com>
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Tina Yang authored
On second look at this bug (OFED #2002), it seems that the collision is not with the retransmission queue (packet acked by the peer), but with the local send completion. A theoretical sequence of events (from time t0 to t3) is thought to be as follows, Thread #1 t0: sock_release rds_release rds_send_drop_to /* wait on send completion */ t2: rds_rdma_drop_keys() /* destroy & free all mrs */ Thread #2 t1: rds_ib_send_cq_comp_handler rds_ib_send_unmap_rm rds_message_unmapped /* wake up #1 @ t0 */ t3: rds_message_put rds_message_purge rds_mr_put /* memory corruption detected */ The problem with the rds_rdma_drop_keys() is it could remove a mr's refcount more than its due (i.e. repeatedly as long as it still remains in the tree (mr->r_refcount > 0)). Theoretically it should remove only one reference - reference by the tree. /* Release any MRs associated with this socket */ while ((node = rb_first(&rs->rs_rdma_keys))) { mr = container_of(node, struct rds_mr, r_rb_node); if (mr->r_trans == rs->rs_transport) mr->r_invalidate = 0; rds_mr_put(mr); } I think the correct way of doing it is to remove the mr from the tree and rds_destroy_mr it first, then a rds_mr_put() to decrement its reference count by one. Whichever thread holds the last reference will free the mr via rds_mr_put(). Signed-off-by:Tina Yang <tina.yang@oracle.com> Signed-off-by:
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Andy Grover authored
in_interrupt() is true in softirqs. The BUG_ONs are supposed to check for if irqs are disabled, so we should use BUG_ON(irqs_disabled()) instead, duh. Signed-off-by:
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- 07 Sep, 2010 37 commits
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Eric Dumazet authored
No need to test twice sk->sk_shutdown & RCV_SHUTDOWN Signed-off-by:
Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Yevgeny Petrilin authored
The values didn't match the title after removing the LRO statistics in commit fa37a958Signed-off-by:
Yevgeny Petrilin <yevgenyp@mellanox.co.il> Signed-off-by:
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Yevgeny Petrilin authored
If failed to get skb frags using napi_get_frags(), the packet is dropped. Reported-by:
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Joe Perches authored
Convert pr_<level>("%s" ..., (struct netdev *)->name ...) to netdev_<level>((struct netdev *), ...) Signed-off-by:Joe Perches <joe@perches.com> Signed-off-by:
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Joe Perches authored
This patch standardizes caif message logging prefixes. Add #define pr_fmt(fmt) KBUILD_MODNAME ":%s(): " fmt, __func__ Add missing "\n"s to some logging messages Convert pr_warning to pr_warn This changes the logging message prefix from CAIF: to caif: for all uses but caif_socket.c and chnl_net.c. Those now use their filename without extension. Signed-off-by:
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Julia Lawall authored
The function has an unsigned return type, but returns a negative constant to indicate an error condition. The result of calling the function is always stored in a variable of type (signed) int, and thus unsigned can be dropped from the return type. A sematic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> @exists@ identifier f; constant C; @@ unsigned f(...) { <+... * return -C; ...+> } // </smpl> Signed-off-by:
Julia Lawall <julia@diku.dk> Signed-off-by:
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Julia Lawall authored
The function has an unsigned return type, but returns a negative constant to indicate an error condition. The result of calling the function is always stored in a variable of type (signed) int, and thus unsigned can be dropped from the return type. A sematic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> @exists@ identifier f; constant C; @@ unsigned f(...) { <+... * return -C; ...+> } // </smpl> Signed-off-by:
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Christian Dietrich authored
The CHELSIO_T1_1G ifdef isn't necessary at this point, because it is checked in an outer ifdef level already and has no effect here. Signed-off-by:
Christian Dietrich <qy03fugy@stud.informatik.uni-erlangen.de> Signed-off-by:
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Joe Perches authored
Add #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt Convert jeprintk to pr_err Remove jeprintk macro define Remove periods from end of logging messages Coalesce format strings Signed-off-by:
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Dan Carpenter authored
This showed up in my audit because we use strcpy() to copy "ds" into a 32 character buffer inside the isdn_tty_dial() function. But it turns out that we only ever use the first 32 characters so it's OK. I have changed the declaration to make the static checkers happy. Signed-off-by:
Dan Carpenter <error27@gmail.com> Signed-off-by:
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Dan Carpenter authored
cs->ics.parm.setup.phone is a 32 character array. In each of these cases we're copying from a 35 character array into a 32 character array so we should use strlcpy() instead of strcpy(). Signed-off-by:
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Jiri Slaby authored
bnad_set_rx_mode omit to unlock bna_lock on one fail path. Fix that. Signed-off-by:
Jiri Slaby <jslaby@suse.cz> Cc: Debashis Dutt <ddutt@brocade.com> Cc: Rasesh Mody <rmody@brocade.com> Cc: David S. Miller <davem@davemloft.net> Signed-off-by:
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Julia Lawall authored
In this case, a device_node structure is stored in another structure that is then freed without first decrementing the reference count of the device_node structure. The semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> @r exists@ expression x; identifier f; position p1,p2; @@ x@p1->f = \(of_find_node_by_path\|of_find_node_by_name\|of_find_node_by_phandle\|of_get_parent\|of_get_next_parent\|of_get_next_child\|of_find_compatible_node\|of_match_node\|of_find_node_by_type\|of_find_node_with_property\|of_find_matching_node\|of_parse_phandle\|of_node_get\)(...); ... when != of_node_put(x) kfree@p2(x) @script:python@ p1 << r.p1; p2 << r.p2; @@ cocci.print_main("call",p1) cocci.print_secs("free",p2) // </smpl> Signed-off-by:
Wolfram Sang <w.sang@pengutronix.de> Signed-off-by:
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Eric Dumazet authored
pskb_expand_head() blindly takes references on fragments before calling skb_release_data(), potentially releasing these references. We can add a fast path, avoiding these atomic operations, if we own the last reference on skb->head. Based on a previous patch from David Signed-off-by:
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Santiago Leon authored
Add an entry to the MAINTAINERS file for ibmveth, clean up the copyright and add all authors. Change the name of the module to reflect the product name over the last number of years. Considering all the changes we have made, bump the driver version. Signed-off-by:
Anton Blanchard <anton@samba.org> Signed-off-by:
Santiago Leon <santil@linux.vnet.ibm.com> Signed-off-by:
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Santiago Leon authored
These files probably came across from the skeleton driver. Remove them. Signed-off-by:
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Santiago Leon authored
We had a driver specific assert function which wasn't enabled most of the time. Convert them to BUG_ON and enable them all the time. Signed-off-by:
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Santiago Leon authored
We had a few cases where we returned success on error. Signed-off-by:
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Santiago Leon authored
Fix most of the kernel coding style issues in ibmveth. Signed-off-by:
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Santiago Leon authored
IbmVethNumBufferPools -> IBMVETH_NUM_BUFF_POOLS Also change IBMVETH_MAX_MTU -> IBMVETH_MIN_MTU, it refers to the minimum size not the maximum. Signed-off-by:
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Santiago Leon authored
Use netdev_err to standardise the error output. Signed-off-by:
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Santiago Leon authored
Use netdev_dbg to standardise the debug output. Signed-off-by:
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Santiago Leon authored
These functions appear before their use, so we can remove the redundant prototypes. Signed-off-by:
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Santiago Leon authored
We were using alloc_skb which doesn't create any headroom. Change it to use netdev_alloc_skb to match most other drivers. Signed-off-by:
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Santiago Leon authored
We export all the driver specific statistics via ethtool, so there is no need to duplicate this in procfs. Signed-off-by:
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Santiago Leon authored
This patch enables TCP checksum offload support for IPv6 on ibmveth. This completely eliminates the generation and checking of the checksum for IPv6 packets that are completely virtual and never touch a physical network. A basic TCPIPV6_STREAM netperf run showed a ~30% throughput improvement when an MTU of 64000 was used. This featured is enabled by default, as is the case for IPv4 checksum offload. When checksum offload is enabled the driver will negotiate IPv4 and IPv6 offload with the firmware separately and enable what is available. As long as either IPv4 or IPv6 offload is supported and enabled the device will report that checksum offload is enabled. The device stats, available through ethtool, will display which checksum offload features are supported/enabled by firmware. Performance testing against a stock kernel shows no regression for IPv4 or IPv6 in terms of throughput or processor utilization with checksum disabled or enabled. Signed-off-by:
Robert Jennings <rcj@linux.vnet.ibm.com> Signed-off-by:
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Santiago Leon authored
Remove code in the device probe function where we set up the checksum offload feature and replace it with a call to an existing function that is doing the same. This is done to clean up the driver in preparation of adding IPv6 checksum offload support. Signed-off-by:
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Santiago Leon authored
On some machines we can improve the bandwidth by ensuring rx buffers are not in the cache. Add a module option that is disabled by default that flushes rx buffers on insertion. Signed-off-by:
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Santiago Leon authored
ibmveth can scatter gather up to 6 segments. If we go over this then we have no option but to call skb_linearize, like other drivers with similar limitations do. Signed-off-by:
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Anton Blanchard authored
We want to order the read in ibmveth_rxq_pending_buffer and the read of ibmveth_rxq_buffer_valid which are both cacheable memory. smp_rmb() is good enough for this. Signed-off-by:
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Santiago Leon authored
For small packets, create a new skb and copy the packet into it so we avoid tearing down and creating a TCE entry. Signed-off-by:
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Santiago Leon authored
Use the existing bounce buffer if we send a buffer under a certain size. This saves the overhead of a TCE map/unmap. I can't see any reason for the wmb() in the bounce buffer case, if we need a barrier it will be before we call h_send_logical_lan but we have nothing in the common case. Remove it. Signed-off-by:
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Santiago Leon authored
The ibmveth adapter needs locking in the transmit routine to protect the bounce_buffer but it sets LLTX and forgets to add any of its own locking. Just remove the deprecated LLTX option. Remove the stats lock in the process. Signed-off-by:
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Santiago Leon authored
At the moment we try and replenish the receive ring on every rx interrupt. We even have a pool->threshold but aren't using it. To limit the maximum latency incurred when refilling, change the threshold from 1/2 to 7/8 and reduce the largest rx pool from 768 buffers to 512 which should be more than enough. Signed-off-by:
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Santiago Leon authored
Replace some modulus operators with an increment and compare to avoid an integer divide. Signed-off-by:
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Denis Kirjanov authored
Signed-off-by:
Denis Kirjanov <dkirjanov@kernel.org> Signed-off-by:
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Denis Kirjanov authored
Signed-off-by:
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