Michal Kubeček ba310bc86f ipv6: prevent fib6_run_gc() contention ... commit 2ac3ac8f86 upstream. On a high-traffic router with many processors and many IPv6 dst entries, soft lockup in fib6_run_gc() can occur when number of entries reaches gc_thresh. This happens because fib6_run_gc() uses fib6_gc_lock to allow only one thread to run the garbage collector but ip6_dst_gc() doesn't update net->ipv6.ip6_rt_last_gc until fib6_run_gc() returns. On a system with many entries, this can take some time so that in the meantime, other threads pass the tests in ip6_dst_gc() (ip6_rt_last_gc is still not updated) and wait for the lock. They then have to run the garbage collector one after another which blocks them for quite long. Resolve this by replacing special value ~0UL of expire parameter to fib6_run_gc() by explicit "force" parameter to choose between spin_lock_bh() and spin_trylock_bh() and call fib6_run_gc() with force=false if gc_thresh is reached but not max_size. Signed-off-by: Michal Kubecek <mkubecek@suse.cz> Signed-off-by: David S. Miller <davem@davemloft.net> Cc: Konstantin Khlebnikov <khlebnikov@yandex-team.ru> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2015-07-03 19:48:09 -07:00
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acpi	ACPICA: Tables: Change acpi_find_root_pointer() to use acpi_physical_address.	2015-05-17 09:51:33 -07:00
asm-generic	nosave: consolidate __nosave_{begin,end} in <asm/sections.h>	2015-05-06 21:56:28 +02:00
clocksource	clocksource: arch_timer: use virtual counters	2014-01-09 12:24:26 -08:00
crypto	crypto: scatterwalk - Use sg_chain_ptr on chain entries	2013-12-11 22:36:29 -08:00
drm	drm/radeon: remove invalid pci id	2014-11-14 08:48:00 -08:00
dt-bindings
keys
linux	include/linux/sched.h: don't use task->pid/tgid in same_thread_group/has_group_leader_pid	2015-07-03 19:48:08 -07:00
math-emu
media	media: vb2: fix VBI/poll regression	2014-10-09 12:18:42 -07:00
memory
misc
net	ipv6: prevent fib6_run_gc() contention	2015-07-03 19:48:09 -07:00
pcmcia
ras
rdma
rxrpc
scsi	scsi: fix our current target reap infrastructure	2014-05-30 21:52:11 -07:00
sound	ALSA: emu10k1: Emu10k2 32 bit DMA mode	2015-05-13 05:15:41 -07:00
target	target: Report correct response length for some commands	2014-06-30 20:09:45 -07:00
trace	tracing: Fix syscall_*regfunc() vs copy_process() race	2014-07-06 18:54:16 -07:00
uapi	netfilter: xt_bpf: add mising opaque struct sk_filter definition	2014-11-21 09:22:54 -08:00
video	Merge branch 'fbdev-3.10-fixes' of git://gitorious.org/linux-omap-dss2/linux into linux-fbdev/for-3.10-fixes	2013-05-29 17:00:34 +08:00
xen	xenbus: delay xenbus frontend resume if xenstored is not running	2013-05-29 09:04:19 -04:00
Kbuild