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* netns xfrm: policy walking in netnsAlexey Dobriyan2008-11-25
| | | | | Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* netns xfrm: finding policy in netnsAlexey Dobriyan2008-11-25
| | | | | | | Add netns parameter to xfrm_policy_bysel_ctx(), xfrm_policy_byidx(). Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* netns xfrm: policy flushing in netnsAlexey Dobriyan2008-11-25
| | | | | Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* netns xfrm: state walking in netnsAlexey Dobriyan2008-11-25
| | | | | Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* netns xfrm: finding states in netnsAlexey Dobriyan2008-11-25
| | | | | Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* netns xfrm: state lookup in netnsAlexey Dobriyan2008-11-25
| | | | | Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* netns xfrm: state flush in netnsAlexey Dobriyan2008-11-25
| | | | | Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* netns xfrm: per-netns policy hash resizing workAlexey Dobriyan2008-11-25
| | | | | Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* netns xfrm: per-netns policy countsAlexey Dobriyan2008-11-25
| | | | | Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* netns xfrm: per-netns xfrm_policy_bydst hashAlexey Dobriyan2008-11-25
| | | | | Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* netns xfrm: per-netns inexact policiesAlexey Dobriyan2008-11-25
| | | | | Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* netns xfrm: per-netns xfrm_policy_byidx hashmaskAlexey Dobriyan2008-11-25
| | | | | | | Per-netns hashes are independently resizeable. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* netns xfrm: per-netns xfrm_policy_byidx hashAlexey Dobriyan2008-11-25
| | | | | Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* netns xfrm: per-netns policy listAlexey Dobriyan2008-11-25
| | | | | Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* netns xfrm: add struct xfrm_policy::xp_netAlexey Dobriyan2008-11-25
| | | | | | | | Again, to avoid complications with passing netns when not necessary. Again, ->xp_net is set-once field, once set it never changes. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* netns xfrm: per-netns km_waitqAlexey Dobriyan2008-11-25
| | | | | | | Disallow spurious wakeups in __xfrm_lookup(). Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* netns xfrm: per-netns state GC workAlexey Dobriyan2008-11-25
| | | | | | | State GC is per-netns, and this is part of it. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* netns xfrm: per-netns state GC listAlexey Dobriyan2008-11-25
| | | | | | | | | | | km_waitq is going to be made per-netns to disallow spurious wakeups in __xfrm_lookup(). To not wakeup after every garbage-collected xfrm_state (which potentially can be from different netns) make state GC list per-netns. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* netns xfrm: per-netns xfrm_hash_workAlexey Dobriyan2008-11-25
| | | | | | | All of this is implicit passing which netns's hashes should be resized. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* netns xfrm: per-netns xfrm_state countsAlexey Dobriyan2008-11-25
| | | | | Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* netns xfrm: per-netns xfrm_state_hmaskAlexey Dobriyan2008-11-25
| | | | | | | Since hashtables are per-netns, they can be independently resized. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* netns xfrm: per-netns xfrm_state_byspi hashAlexey Dobriyan2008-11-25
| | | | | Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* netns xfrm: per-netns xfrm_state_bysrc hashAlexey Dobriyan2008-11-25
| | | | | Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* netns xfrm: per-netns xfrm_state_bydst hashAlexey Dobriyan2008-11-25
| | | | | Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* netns xfrm: per-netns xfrm_state_all listAlexey Dobriyan2008-11-25
| | | | | | | | | | | This is done to get a) simple "something leaked" check b) cover possible DoSes when other netns puts many, many xfrm_states onto a list. c) not miss "alien xfrm_state" check in some of list iterators in future. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* netns xfrm: add struct xfrm_state::xs_netAlexey Dobriyan2008-11-25
| | | | | | | | | | | | To avoid unnecessary complications with passing netns around. * set once, very early after allocating * once set, never changes For a while create every xfrm_state in init_net. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* netns xfrm: add netns boilerplateAlexey Dobriyan2008-11-25
| | | | | Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* tcp: tcp_limit_reno_sacked can become staticIlpo Järvinen2008-11-25
| | | | | Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi> Signed-off-by: David S. Miller <davem@davemloft.net>
* tcp: Try to restore large SKBs while SACK processingIlpo Järvinen2008-11-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | During SACK processing, most of the benefits of TSO are eaten by the SACK blocks that one-by-one fragment SKBs to MSS sized chunks. Then we're in problems when cleanup work for them has to be done when a large cumulative ACK comes. Try to return back to pre-split state already while more and more SACK info gets discovered by combining newly discovered SACK areas with the previous skb if that's SACKed as well. This approach has a number of benefits: 1) The processing overhead is spread more equally over the RTT 2) Write queue has less skbs to process (affect everything which has to walk in the queue past the sacked areas) 3) Write queue is consistent whole the time, so no other parts of TCP has to be aware of this (this was not the case with some other approach that was, well, quite intrusive all around). 4) Clean_rtx_queue can release most of the pages using single put_page instead of previous PAGE_SIZE/mss+1 calls In case a hole is fully filled by the new SACK block, we attempt to combine the next skb too which allows construction of skbs that are even larger than what tso split them to and it handles hole per on every nth patterns that often occur during slow start overshoot pretty nicely. Though this to be really useful also a retransmission would have to get lost since cumulative ACKs advance one hole at a time in the most typical case. TODO: handle upwards only merging. That should be rather easy when segment is fully sacked but I'm leaving that as future work item (it won't make very large difference anyway since this current approach already covers quite a lot of normal cases). I was earlier thinking of some sophisticated way of tracking timestamps of the first and the last segment but later on realized that it won't be that necessary at all to store the timestamp of the last segment. The cases that can occur are basically either: 1) ambiguous => no sensible measurement can be taken anyway 2) non-ambiguous is due to reordering => having the timestamp of the last segment there is just skewing things more off than does some good since the ack got triggered by one of the holes (besides some substle issues that would make determining right hole/skb even harder problem). Anyway, it has nothing to do with this change then. I choose to route some abnormal looking cases with goto noop, some could be handled differently (eg., by stopping the walking at that skb but again). In general, they either shouldn't happen at all or are rare enough to make no difference in practice. In theory this change (as whole) could cause some macroscale regression (global) because of cache misses that are taken over the round-trip time but it gets very likely better because of much less (local) cache misses per other write queue walkers and the big recovery clearing cumulative ack. Worth to note that these benefits would be very easy to get also without TSO/GSO being on as long as the data is in pages so that we can merge them. Currently I won't let that happen because DSACK splitting at fragment that would mess up pcounts due to sk_can_gso in tcp_set_skb_tso_segs. Once DSACKs fragments gets avoided, we have some conditions that can be made less strict. TODO: I will probably have to convert the excessive pointer passing to struct sacktag_state... :-) My testing revealed that considerable amount of skbs couldn't be shifted because they were cloned (most likely still awaiting tx reclaim)... [The rest is considering future work instead since I got repeatably EFAULT to tcpdump's recvfrom when I added pskb_expand_head to deal with clones, so I separated that into another, later patch] ...To counter that, I gave up on the fifth advantage: 5) When growing previous SACK block, less allocs for new skbs are done, basically a new alloc is needed only when new hole is detected and when the previous skb runs out of frags space ...which now only happens of if reclaim is fast enough to dispose the clone before the SACK block comes in (the window is RTT long), otherwise we'll have to alloc some. With clones being handled I got these numbers (will be somewhat worse without that), taken with fine-grained mibs: TCPSackShifted 398 TCPSackMerged 877 TCPSackShiftFallback 320 TCPSACKCOLLAPSEFALLBACKGSO 0 TCPSACKCOLLAPSEFALLBACKSKBBITS 0 TCPSACKCOLLAPSEFALLBACKSKBDATA 0 TCPSACKCOLLAPSEFALLBACKBELOW 0 TCPSACKCOLLAPSEFALLBACKFIRST 1 TCPSACKCOLLAPSEFALLBACKPREVBITS 318 TCPSACKCOLLAPSEFALLBACKMSS 1 TCPSACKCOLLAPSEFALLBACKNOHEAD 0 TCPSACKCOLLAPSEFALLBACKSHIFT 0 TCPSACKCOLLAPSENOOPSEQ 0 TCPSACKCOLLAPSENOOPSMALLPCOUNT 0 TCPSACKCOLLAPSENOOPSMALLLEN 0 TCPSACKCOLLAPSEHOLE 12 Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi> Signed-off-by: David S. Miller <davem@davemloft.net>
* tcp: move tcp_simple_retransmit to tcp_inputIlpo Järvinen2008-11-25
| | | | | Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: avoid a pair of dst_hold()/dst_release() in ip_append_data()Eric Dumazet2008-11-24
| | | | | | | | | | | | | | | | | We can reduce pressure on dst entry refcount that slowdown UDP transmit path on SMP machines. This pressure is visible on RTP servers when delivering content to mediagateways, especially big ones, handling thousand of streams. Several cpus send UDP frames to the same destination, hence use the same dst entry. This patch makes ip_append_data() eventually steal the refcount its callers had to take on the dst entry. This doesnt avoid all refcounting, but still gives speedups on SMP, on UDP/RAW transmit path Signed-off-by: Eric Dumazet <dada1@cosmosbay.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: Convert TCP/DCCP listening hash tables to use RCUEric Dumazet2008-11-23
| | | | | | | | | | | | | | | | | | | | | | This is the last step to be able to perform full RCU lookups in __inet_lookup() : After established/timewait tables, we add RCU lookups to listening hash table. The only trick here is that a socket of a given type (TCP ipv4, TCP ipv6, ...) can now flight between two different tables (established and listening) during a RCU grace period, so we must use different 'nulls' end-of-chain values for two tables. We define a large value : #define LISTENING_NULLS_BASE (1U << 29) So that slots in listening table are guaranteed to have different end-of-chain values than slots in established table. A reader can still detect it finished its lookup in the right chain. Signed-off-by: Eric Dumazet <dada1@cosmosbay.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* WAN: syncppp.c is no longer used by any kernel code. Remove it.Krzysztof Hałasa2008-11-21
| | | | Signed-off-by: Krzysztof Hałasa <khc@pm.waw.pl>
* Merge branch 'master' of ↵David S. Miller2008-11-21
|\ | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next-2.6
| * wireless: missing include in lib80211.hRami Rosen2008-11-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds #include <linux/timer.h> in lib80211.h to avoid these compilation erros. > In file included from /work/src/wireless-testing/net/wireless/lib80211.c:24: > /work/src/wireless-testing/include/net/lib80211.h:113: error: field > 'crypt_deinit_timer' has incomplete type > /work/src/wireless-testing/net/wireless/lib80211.c: In function > 'lib80211_crypt_info_init': > /work/src/wireless-testing/net/wireless/lib80211.c:83: error: implicit > declaration of function 'setup_timer' > /work/src/wireless-testing/net/wireless/lib80211.c: In function > 'lib80211_crypt_info_free': > /work/src/wireless-testing/net/wireless/lib80211.c:95: error: implicit > declaration of function 'del_timer_sync' > /work/src/wireless-testing/net/wireless/lib80211.c: In function > 'lib80211_crypt_deinit_handler': > /work/src/wireless-testing/net/wireless/lib80211.c:157: error: > implicit declaration of function 'add_timer' > /work/src/wireless-testing/net/wireless/lib80211.c: In function > 'lib80211_crypt_delayed_deinit': > /work/src/wireless-testing/net/wireless/lib80211.c:182: error: > implicit declaration of function 'timer_pending' > make[3]: *** [net/wireless/lib80211.o] Error 1 > make[2]: *** [net/wireless] Error 2 > make[1]: *** [net] Error 2 > make: *** [sub-make] Error 2 Signed-off-by: Rami Rosen <ramirose@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
| * mac80211: add explicit padding in struct ieee80211_tx_infoJohn W. Linville2008-11-21
| | | | | | | | | | | | | | Otherwise, the BUILD_BUG_ON calls in ieee80211_tx_info_clear_status can fail on some architectures. Signed-off-by: John W. Linville <linville@tuxdriver.com>
| * lib80211: consolidate crypt init routinesJohn W. Linville2008-11-21
| | | | | | | | Signed-off-by: John W. Linville <linville@tuxdriver.com>
| * lib80211: absorb crypto bits from net/ieee80211John W. Linville2008-11-21
| | | | | | | | | | | | | | | | | | These bits are shared already between ipw2x00 and hostap, and could probably be shared both more cleanly and with other drivers. This commit simply relocates the code to lib80211 and adjusts the drivers appropriately. Signed-off-by: John W. Linville <linville@tuxdriver.com>
| * mac80211: remove more excess kernel-docRandy Dunlap2008-11-21
| | | | | | | | | | | | | | | | | | | | | | | | | | Delete kernel-doc struct descriptions for fields that don't exist: Warning(include/net/mac80211.h:1263): Excess struct/union/enum/typedef member 'conf_ht' description in 'ieee80211_ops' Warning(net/mac80211/sta_info.h:309): Excess struct/union/enum/typedef member 'addr' description in 'sta_info' Warning(net/mac80211/sta_info.h:309): Excess struct/union/enum/typedef member 'aid' description in 'sta_info' Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> cc: Johannes Berg <johannes@sipsolutions.net> cc: John W. Linville <linville@tuxdriver.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
| * mac80211: fix BUILD_BUG_ON() caused by misalignment on armFelix Fietkau2008-11-21
| | | | | | | | | | | | | | | | | | | | | | | | | | On ARM alignment is done slightly different from other architectures. struct ieee80211_tx_rate is aligned to word size, even though it only has 3 single-byte members, which triggers the BUILD_BUG_ON in ieee80211_tx_info_clear_status This patch marks the struct ieee80211_tx_rate as packed, so that ARM behaves like the other architectures. Signed-off-by: Felix Fietkau <nbd@openwrt.org> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* | net: use net_eq() in INET_MATCH and INET_TW_MATCHEric Dumazet2008-11-21
|/ | | | | | | | | | | | We can avoid some useless instructions if !CONFIG_NET_NS Because of RCU, we use INET_MATCH or INET_TW_MATCH twice for the found socket, so thats six instructions less per incoming TCP packet. Yet another tbench speedup :) Signed-off-by: Eric Dumazet <dada1@cosmosbay.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* DCB: Add support for DCB BCNAlexander Duyck2008-11-21
| | | | | | | | | | | | Adds an interface to configure the Backward Congestion Notification (BCN) feature. In a BCN capabale network, congestion notifications from congested points out in the network can cause the end station limit the rate of a given traffic flow. Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Signed-off-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* DCB: Add interface to query the state of PFC feature.Alexander Duyck2008-11-21
| | | | | | | | | | | | Adds a netlink interface for Data Center Bridging (DCB) to get and set the enable state of the Priority Flow Control (PFC) feature. Primarily, this is a way to turn off PFC in the driver while DCB remains enabled. Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Signed-off-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* DCB: Add interface to query # of TCs supported by deviceAlexander Duyck2008-11-21
| | | | | | | | | | | | Adds interface for Data Center Bridging (DCB) to query (and set if supported) the number of traffic classes currently supported by the device for the two (DCB) features: priority groups (PG) and priority flow control (PFC). Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Signed-off-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* DCB: Add interface to query for the DCB capabilities of an device.Alexander Duyck2008-11-21
| | | | | | | | | | Adds to the netlink interface for Data Center Bridging (DCB), allowing the DCB capabilities supported by a device to be queried. Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Signed-off-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* ixgbe: this patch adds support for DCB to the kernel and ixgbe driverAlexander Duyck2008-11-20
| | | | | | | | | | | | | | | This adds support for Data Center Bridging (DCB) features in the ixgbe driver and adds an rtnetlink interface for configuring DCB to the kernel. The DCB feature support included are Priority Grouping (PG) - which allows bandwidth guarantees to be allocated to groups to traffic based on the 802.1q priority, and Priority Based Flow Control (PFC) - which introduces a new MAC control PAUSE frame which works at granularity of the 802.1p priority instead of the link (IEEE 802.3x). Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Signed-off-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: convert TCP/DCCP ehash rwlocks to spinlocksEric Dumazet2008-11-20
| | | | | | | | | | | | Now TCP & DCCP use RCU lookups, we can convert ehash rwlocks to spinlocks. /proc/net/tcp and other seq_file 'readers' can safely be converted to 'writers'. This should speedup writers, since spin_lock()/spin_unlock() only use one atomic operation instead of two for write_lock()/write_unlock() Signed-off-by: Eric Dumazet <dada1@cosmosbay.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* Merge branch 'master' of ↵David S. Miller2008-11-20
|\ | | | | | | | | | | | | | | | | | | master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 Conflicts: drivers/net/ixgbe/ixgbe_main.c include/net/mac80211.h net/phonet/af_phonet.c
| * mac80211: remove ieee80211_notify_macJohannes Berg2008-11-18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Before ieee80211_notify_mac() was added, it was presented with the use case of using it to tell mac80211 that the association may have been lost because the firmware crashed/reset. Since then, it has also been used by iwlwifi to (slightly) speed up re-association after resume, a workaround around the fact that mac80211 has no suspend/resume handling yet. It is also not used by any other drivers, so clearly it cannot be necessary for "good enough" suspend/resume. Unfortunately, the callback suffers from a severe problem: It only works for station mode. If suspend/resume happens while in IBSS or any other mode (but station), then the callback is pointless. Recently, it has created a number of locking issues, first because it required rtnl locking rather than RCU due to calling sleeping functions within the critical section, and now because it's called by iwlwifi from the mac80211 workqueue that may not use the rtnl because it is flushed under rtnl. (cf. http://bugzilla.kernel.org/show_bug.cgi?id=12046) I think, therefore, that we should take a step back, remove it entirely for now and add the small feature it provided properly. For suspend and resume we will need to introduce new hooks, and for the case where the firmware was reset the driver will probably simply just pretend it has done a suspend/resume cycle to get mac80211 to reprogram the hardware completely, not just try to connect to the current AP again in station mode. When doing so, we will need to take into account locking issues and possibly defer to schedule_work from within mac80211 for the resume operation, while the suspend operation must be done directly. Proper suspend/resume should also not necessarily try to reconnect to the current AP, the time spent in suspend may have been short enough to not be disconnected from the AP, mac80211 will detect that the AP went out of range quickly if it did, and if the association is lost then the AP will disassoc as soon as a data frame is sent. We might also take into account WWOL then, and have mac80211 program the hardware into such a mode where it is available and requested. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* | net: listening_hash get a spinlock per bucketEric Dumazet2008-11-20
| | | | | | | | | | | | | | | | | | | | | | | | | | This patch prepares RCU migration of listening_hash table for TCP/DCCP protocols. listening_hash table being small (32 slots per protocol), we add a spinlock for each slot, instead of a single rwlock for whole table. This should reduce hold time of readers, and writers concurrency. Signed-off-by: Eric Dumazet <dada1@cosmosbay.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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