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2008-07-18Merge branch 'master' of ↵David S. Miller
master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6 Conflicts: Documentation/powerpc/booting-without-of.txt drivers/atm/Makefile drivers/net/fs_enet/fs_enet-main.c drivers/pci/pci-acpi.c net/8021q/vlan.c net/iucv/iucv.c
2008-07-17pkt_sched: Make default qdisc nonshared-multiqueue safe.David S. Miller
Instead of 'pfifo_fast' we have just plain 'fifo_fast'. No priority queues, just a straight FIFO. This is necessary in order to legally have a seperate qdisc per queue in multi-TX-queue setups, and thus get full parallelization. Signed-off-by: David S. Miller <davem@davemloft.net>
2008-07-17pkt_sched: Don't used locked skb_queue_purge() in __qdisc_reset_queue()David S. Miller
We have to have exclusive access to the given qdisc anyways, so doing even more locking is superfluous. Signed-off-by: David S. Miller <davem@davemloft.net>
2008-07-17pkt_sched: Add multiqueue handling to qdisc_graft().David S. Miller
Move the destruction of the old queue into qdisc_graft(). When operating on a root qdisc (ie. "parent == NULL"), apply the operation to all queues. The caller has grabbed a single implicit reference for this graft, therefore when we apply the change to more than one queue we must grab additional qdisc references. Otherwise, we are operating on a class of a specific parent qdisc, and therefore no multiqueue handling is necessary. Signed-off-by: David S. Miller <davem@davemloft.net>
2008-07-17pkt_sched: Kill netdev_queue lock.David S. Miller
We can simply use the qdisc->q.lock for all of the qdisc tree synchronization. Signed-off-by: David S. Miller <davem@davemloft.net>
2008-07-17pkt_sched: Kill qdisc_lock_tree and qdisc_unlock_tree.David S. Miller
No longer used. Signed-off-by: David S. Miller <davem@davemloft.net>
2008-07-17pkt_sched: Rework {sch,tbf}_tree_lock().David S. Miller
Make sch_tree_lock() lock the qdisc's root. All of the users hold the RTNL semaphore and the root qdisc is not changing. Implement tbf_tree_{lock,unlock}() simply in terms of sch_tree_{lock,unlock}(). Signed-off-by: David S. Miller <davem@davemloft.net>
2008-07-17pkt_sched: Make qdisc grafting locking more specific.David S. Miller
Lock the root of the qdisc being operated upon. All explicit references to qdisc_tree_lock() are now gone. The only remaining uses are via the sch_tree_{lock,unlock}() and tcf_tree_{lock,unlock}() macros. Signed-off-by: David S. Miller <davem@davemloft.net>
2008-07-17netdevice: Move qdisc_list back into net_device proper.David S. Miller
And give it it's own lock. Signed-off-by: David S. Miller <davem@davemloft.net>
2008-07-17pkt_sched: Kill qdisc_lock_tree usage in cls_route.cDavid S. Miller
It just wants the qdisc tree to be synchronized, so grabbing qdisc_root_lock() is sufficient. Signed-off-by: David S. Miller <davem@davemloft.net>
2008-07-17pkt_sched: Remove qdisc_lock_tree usage in cls_api.cDavid S. Miller
It just wants the qdisc tree for the filter to be synchronized. So just BH lock qdisc_root_lock(q) instead. Signed-off-by: David S. Miller <davem@davemloft.net>
2008-07-17pkt_sched: Use per-queue locking in shutdown_scheduler_queue.David S. Miller
This eliminates another qdisc_lock_tree user. Signed-off-by: David S. Miller <davem@davemloft.net>
2008-07-17pkt_sched: Perform bulk of qdisc destruction in RCU.David S. Miller
This allows less strict control of access to the qdisc attached to a netdev_queue. It is even allowed to enqueue into a qdisc which is in the process of being destroyed. The RCU handler will toss out those packets. We will need this to handle sharing of a qdisc amongst multiple TX queues. In such a setup the lock has to be shared, so will be inside of the qdisc itself. At which point the netdev_queue lock cannot be used to hard synchronize access to the ->qdisc pointer. One operation we have to keep inside of qdisc_destroy() is the list deletion. It is the only piece of state visible after the RCU quiesce period, so we have to undo it early and under the appropriate locking. The operations in the RCU handler do not need any looking because the qdisc tree is no longer visible to anything at that point. Signed-off-by: David S. Miller <davem@davemloft.net>
2008-07-17pkt_sched: dev_init_scheduler() does not need to lock qdisc tree.David S. Miller
We are registering the device, there is no way anyone can get at this object's qdiscs yet in any meaningful way. Signed-off-by: David S. Miller <davem@davemloft.net>
2008-07-17pkt_sched: Schedule qdiscs instead of netdev_queue.David S. Miller
When we have shared qdiscs, packets come out of the qdiscs for multiple transmit queues. Therefore it doesn't make any sense to schedule the transmit queue when logically we cannot know ahead of time the TX queue of the SKB that the qdisc->dequeue() will give us. Just for sanity I added a BUG check to make sure we never get into a state where the noop_qdisc is scheduled. Signed-off-by: David S. Miller <davem@davemloft.net>
2008-07-17pkt_sched: Add and use qdisc_root() and qdisc_root_lock().David S. Miller
When code wants to lock the qdisc tree state, the logic operation it's doing is locking the top-level qdisc that sits of the root of the netdev_queue. Add qdisc_root_lock() to represent this and convert the easiest cases. In order for this to work out in all cases, we have to hook up the noop_qdisc to a dummy netdev_queue. Signed-off-by: David S. Miller <davem@davemloft.net>
2008-07-17pkt_sched: Make QDISC_RUNNING a qdisc state.David S. Miller
Currently it is associated with a netdev_queue, but when we have qdisc sharing that no longer makes any sense. Signed-off-by: David S. Miller <davem@davemloft.net>
2008-07-17pkt_sched: Move gso_skb into Qdisc.David S. Miller
We liberate any dangling gso_skb during qdisc destruction. It really only matters for the root qdisc. But when qdiscs can be shared by multiple netdev_queue objects, we can't have the gso_skb in the netdev_queue any more. Signed-off-by: David S. Miller <davem@davemloft.net>
2008-07-17niu: Add TX multiqueue support.David S. Miller
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-07-17netdev: Kill plain netif_schedule()David S. Miller
No more users. Signed-off-by: David S. Miller <davem@davemloft.net>
2008-07-17netdev: Convert all drivers away from netif_schedule().David S. Miller
They logically all want to trigger a schedule for all device TX queues. Signed-off-by: David S. Miller <davem@davemloft.net>
2008-07-17net: Implement simple sw TX hashing.David S. Miller
It just xor hashes over IPv4/IPv6 addresses and ports of transport. The only assumption it makes is that skb_network_header() is set correctly. With bug fixes from Eric Dumazet. Signed-off-by: David S. Miller <davem@davemloft.net>
2008-07-17mac80211: Reimplement WME using ->select_queue().David S. Miller
The only behavior change is that we do not drop packets under any circumstances. If that is absolutely needed, we could easily add it back. With cleanups and help from Johannes Berg. Signed-off-by: David S. Miller <davem@davemloft.net>
2008-07-17netdev: Add netdev->select_queue() method.David S. Miller
Devices or device layers can set this to control the queue selection performed by dev_pick_tx(). This function runs under RCU protection, which allows overriding functions to have some way of synchronizing with things like dynamic ->real_num_tx_queues adjustments. This makes the spinlock prefetch in dev_queue_xmit() a little bit less effective, but that's the price right now for correctness. Signed-off-by: David S. Miller <davem@davemloft.net>
2008-07-17netdev: netdev_priv() can now be sane again.David S. Miller
The private area of a netdev is now at a fixed offset once more. Unfortunately, some assumptions that netdev_priv() == netdev->priv crept back into the tree. In particular this happened in the loopback driver. Make it use netdev->ml_priv. Signed-off-by: David S. Miller <davem@davemloft.net>
2008-07-17netdev: Kill struct net_device_subqueue and netdev->egress_subqueue*David S. Miller
No longer used. Signed-off-by: David S. Miller <davem@davemloft.net>
2008-07-17net: Use queue aware tests throughout.David S. Miller
This effectively "flips the switch" by making the core networking and multiqueue-aware drivers use the new TX multiqueue structures. Non-multiqueue drivers need no changes. The interfaces they use such as netif_stop_queue() degenerate into an operation on TX queue zero. So everything "just works" for them. Code that really wants to do "X" to all TX queues now invokes a routine that does so, such as netif_tx_wake_all_queues(), netif_tx_stop_all_queues(), etc. pktgen and netpoll required a little bit more surgery than the others. In particular the pktgen changes, whilst functional, could be largely improved. The initial check in pktgen_xmit() will sometimes check the wrong queue, which is mostly harmless. The thing to do is probably to invoke fill_packet() earlier. The bulk of the netpoll changes is to make the code operate solely on the TX queue indicated by by the SKB queue mapping. Setting of the SKB queue mapping is entirely confined inside of net/core/dev.c:dev_pick_tx(). If we end up needing any kind of special semantics (drops, for example) it will be implemented here. Finally, we now have a "real_num_tx_queues" which is where the driver indicates how many TX queues are actually active. With IGB changes from Jeff Kirsher. Signed-off-by: David S. Miller <davem@davemloft.net>
2008-07-17mac80211: Temporarily mark QoS support BROKEN.David S. Miller
We will undo this after a few changsets. Signed-off-by: David S. Miller <davem@davemloft.net>
2008-07-17pkt_sched: Remove RR scheduler.David S. Miller
This actually fixes a bug added by the RR scheduler changes. The ->bands and ->prio2band parameters were being set outside of the sch_tree_lock() and thus could result in strange behavior and inconsistencies. It might be possible, in the new design (where there will be one qdisc per device TX queue) to allow similar functionality via a TX hash algorithm for RR but I really see no reason to export this aspect of how these multiqueue cards actually implement the scheduling of the the individual DMA TX rings and the single physical MAC/PHY port. Signed-off-by: David S. Miller <davem@davemloft.net>
2008-07-17netdev: Kill NETIF_F_MULTI_QUEUE.David S. Miller
There is no need for a feature bit for something that can be tested by simply checking the TX queue count. Signed-off-by: David S. Miller <davem@davemloft.net>
2008-07-17netdev: Allocate multiple queues for TX.David S. Miller
alloc_netdev_mq() now allocates an array of netdev_queue structures for TX, based upon the queue_count argument. Furthermore, all accesses to the TX queues are now vectored through the netdev_get_tx_queue() and netdev_for_each_tx_queue() interfaces. This makes it easy to grep the tree for all things that want to get to a TX queue of a net device. Problem spots which are not really multiqueue aware yet, and only work with one queue, can easily be spotted by grepping for all netdev_get_tx_queue() calls that pass in a zero index. Signed-off-by: David S. Miller <davem@davemloft.net>
2008-07-17igb: Kill CONFIG_NETDEVICES_MULTIQUEUE references, no longer exists.David S. Miller
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-07-17Merge branch 'upstream-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/mfasheh/ocfs2 * 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mfasheh/ocfs2: [PATCH] ocfs2: fix oops in mmap_truncate testing configfs: call drop_link() to cleanup after create_link() failure configfs: Allow ->make_item() and ->make_group() to return detailed errors. configfs: Fix failing mkdir() making racing rmdir() fail configfs: Fix deadlock with racing rmdir() and rename() configfs: Make configfs_new_dirent() return error code instead of NULL configfs: Protect configfs_dirent s_links list mutations configfs: Introduce configfs_dirent_lock ocfs2: Don't snprintf() without a format. ocfs2: Fix CONFIG_OCFS2_DEBUG_FS #ifdefs ocfs2/net: Silence build warnings on sparc64 ocfs2: Handle error during journal load ocfs2: Silence an error message in ocfs2_file_aio_read() ocfs2: use simple_read_from_buffer() ocfs2: fix printk format warnings with OCFS2_FS_STATS=n [PATCH 2/2] ocfs2: Instrument fs cluster locks [PATCH 1/2] ocfs2: Add CONFIG_OCFS2_FS_STATS config option
2008-07-17Merge git://git.kernel.org/pub/scm/linux/kernel/git/brodo/pcmcia-fixes-2.6Linus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/brodo/pcmcia-fixes-2.6: pcmcia: ide-cs: Remove outdated comment pcmcia: fix cisinfo_t removal pcmcia: fix return value in cm4000_cs.c
2008-07-17Merge branch 'x86-fixes-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86: fix asm/e820.h for userspace inclusion x86: fix numaq_tsc_disable x86: fix kernel_physical_mapping_init() for large x86 systems
2008-07-17Merge branch 'tracing-fixes-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: ftrace: do not trace library functions ftrace: do not trace scheduler functions ftrace: fix lockup with MAXSMP ftrace: fix merge buglet
2008-07-17x86: fix asm/e820.h for userspace inclusionRusty Russell
asm-x86/e820.h is included from userspace. 'x86: make e820.c to have common functions' (b79cd8f1268bab57ff85b19d131f7f23deab2dee) broke it: make -C Documentation/lguest cc -Wall -Wmissing-declarations -Wmissing-prototypes -O3 -I../../include lguest.c -lz -o lguest In file included from ../../include/asm-x86/bootparam.h:8, from lguest.c:45: ../../include/asm/e820.h:66: error: expected ‘)’ before ‘start’ ../../include/asm/e820.h:67: error: expected ‘)’ before ‘start’ ../../include/asm/e820.h:68: error: expected ‘)’ before ‘start’ ../../include/asm/e820.h:72: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘e820_update_range’ ... Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Cc: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-17x86: fix numaq_tsc_disableYinghai Lu
fix: arch/x86/kernel/numaq_32.c: In function ‘numaq_tsc_disable’: arch/x86/kernel/numaq_32.c:99: warning: ‘return’ with a value, in function returning void Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-17Merge branch 'linus' into x86/urgentIngo Molnar
2008-07-17fix build error of arch/ia64/kvm/*Takashi Iwai
Fix calls of smp_call_function*() in arch/ia64/kvm for recent API changes. CC [M] arch/ia64/kvm/kvm-ia64.o arch/ia64/kvm/kvm-ia64.c: In function 'handle_global_purge': arch/ia64/kvm/kvm-ia64.c:398: error: too many arguments to function 'smp_call_function_single' arch/ia64/kvm/kvm-ia64.c: In function 'kvm_vcpu_kick': arch/ia64/kvm/kvm-ia64.c:1696: error: too many arguments to function 'smp_call_function_single' Signed-off-by: Takashi Iwai <tiwai@suse.de> Acked-by Xiantao Zhang <xiantao.zhang@intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-07-17Merge branch 'ptrace-cleanup' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/frob/linux-2.6-utrace * 'ptrace-cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/frob/linux-2.6-utrace: fix dangling zombie when new parent ignores children do_wait: return security_task_wait() error code in place of -ECHILD ptrace children revamp do_wait reorganization
2008-07-17Update scripts/Makefile.fwinst to cope with older makeDavid Woodhouse
Also fix unwanted rebuilds of the firmware/ihex2fw tool by including the .ihex2fw.cmd file when present. Signed-off-by: David Woodhouse <David.Woodhouse@intel.com> Reported-and-tested-by: Wang Chen <wangchen@cn.fujitsu.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-07-17Merge branch 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6Linus Torvalds
* 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6: [S390] dasd: use -EOPNOTSUPP instead of -ENOTSUPP [S390] qdio: new qdio driver. [S390] cio: Export chsc_error_from_response(). [S390] vmur: Fix return code handling. [S390] Fix stacktrace compile bug. [S390] Increase default warning stacksize. [S390] dasd: Fix cleanup in dasd_{fba,diag}_check_characteristics(). [S390] chsc headers userspace cleanup [S390] dasd: fix unsolicited SIM handling. [S390] zfcpdump: Make SCSI disk dump tool recognize storage holes
2008-07-17Fix collateral damage to top level MakefileGrant Likely
The patch named "powerpc/mpc5121: Add clock driver", also contained an unrelated and bogus change to the top-level makefile. This patch backs out the bad bit. SHA1 of offending patch: 137e95906e294913fab02162e8a1948ade49acb5) Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Repented-by: John Rigby <jrigby@freescale.com> [ Heh. Normally I pick these out from the diffstats, but I guess I've grown to trust the ppc tree too much ;) - Linus ] Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-07-17ftrace: do not trace library functionsIngo Molnar
make function tracing more robust: do not trace library functions. We've already got a sizable list of exceptions: ifdef CONFIG_FTRACE # Do not profile string.o, since it may be used in early boot or vdso CFLAGS_REMOVE_string.o = -pg # Also do not profile any debug utilities CFLAGS_REMOVE_spinlock_debug.o = -pg CFLAGS_REMOVE_list_debug.o = -pg CFLAGS_REMOVE_debugobjects.o = -pg CFLAGS_REMOVE_find_next_bit.o = -pg CFLAGS_REMOVE_cpumask.o = -pg CFLAGS_REMOVE_bitmap.o = -pg endif ... and the pattern has been that random library functionality showed up in ftrace's critical path (outside of its recursion check), causing hard to debug lockups. So be a bit defensive about it and exclude all lib/*.o functions by default. It's not that they are overly interesting for tracing purposes anyway. Specific ones can still be traced, in an opt-in manner. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-17ftrace: do not trace scheduler functionsIngo Molnar
do not trace scheduler functions - it's still a bit fragile and can lock up with: http://redhat.com/~mingo/misc/config-Thu_Jul_17_13_34_52_CEST_2008 Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-17ftrace: fix lockup with MAXSMPIngo Molnar
MAXSMP brings in lots of use of various bitops in smp_processor_id() and friends - causing ftrace to lock up during bootup: calling anon_inode_init+0x0/0x130 initcall anon_inode_init+0x0/0x130 returned 0 after 0 msecs calling acpi_event_init+0x0/0x57 [ hard hang ] So exclude the bitops facilities from tracing. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-17[S390] dasd: use -EOPNOTSUPP instead of -ENOTSUPPStefan Haberland
return value -ENOTSUPP is not valid in userspace context, use -EOPNOTSUPP instead Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
2008-07-17[S390] qdio: new qdio driver.Jan Glauber
List of major changes: - split qdio driver into several files - seperation of thin interrupt code - improved handling for multiple thin interrupt devices - inbound and outbound processing now always runs in tasklet context - significant less tasklet schedules per interrupt needed - merged qebsm with non-qebsm handling - cleanup qdio interface and added kerneldoc - coding style Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Reviewed-by: Utz Bacher <utz.bacher@de.ibm.com> Reviewed-by: Ursula Braun <braunu@de.ibm.com> Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
2008-07-17[S390] cio: Export chsc_error_from_response().Cornelia Huck
Make chsc_error_from_response() available to chsc callers outside of chsc.c (namely qdio) to avoid duplicating error checking code. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>