Dear RT Folks, I'm pleased to announce the 3.2.82-rt119 stable release.
You can get this release via the git tree at: git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-stable-rt.git branch: v3.2-rt Head SHA1: 3ffab7f8bcac1a73264542327140a5e674e9c875 Or to build 3.2.82-rt119 directly, the following patches should be applied: http://www.kernel.org/pub/linux/kernel/v3.x/linux-3.2.tar.xz http://www.kernel.org/pub/linux/kernel/v3.x/patch-3.2.82.xz http://www.kernel.org/pub/linux/kernel/projects/rt/3.2/patch-3.2.82-rt119.patch.xz You can also build from 3.2.82-rt118 by applying the incremental patch: http://www.kernel.org/pub/linux/kernel/projects/rt/3.2/incr/patch-3.2.82-rt118-rt119.patch.xz Enjoy, -- Steve Changes from v3.2.82-rt118: --- Sebastian Andrzej Siewior (6): timers: wakeup all timer waiters timers: wakeup all timer waiters without holding the base lock net: add back the missing serialization in ip_send_unicast_reply() net: add a lock around icmp_sk() fs/dcache: resched/chill only if we make no progress fs/dcache: incremental fixup of the retry routine Steven Rostedt (Red Hat) (1): Linux 3.2.82-rt119 ---- fs/dcache.c | 17 +++++++++++++++-- kernel/timer.c | 4 ++-- localversion-rt | 2 +- net/ipv4/icmp.c | 8 ++++++++ net/ipv4/tcp_ipv4.c | 7 +++++++ 5 files changed, 33 insertions(+), 5 deletions(-) --------------------------- diff --git a/fs/dcache.c b/fs/dcache.c index 0089bd3c86ce..bea5589bc957 100644 --- a/fs/dcache.c +++ b/fs/dcache.c @@ -465,6 +465,8 @@ relock: */ void dput(struct dentry *dentry) { + struct dentry *parent; + if (!dentry) return; @@ -502,9 +504,20 @@ repeat: return; kill_it: - dentry = dentry_kill(dentry, 1); - if (dentry) + parent = dentry_kill(dentry, 1); + if (parent) { + int r; + + if (parent == dentry) { + /* the task with the highest priority won't schedule */ + r = cond_resched(); + if (!r) + cpu_chill(); + } else { + dentry = parent; + } goto repeat; + } } EXPORT_SYMBOL(dput); diff --git a/kernel/timer.c b/kernel/timer.c index badd2d2066dc..9e1b9db4c8b8 100644 --- a/kernel/timer.c +++ b/kernel/timer.c @@ -932,7 +932,7 @@ static void wait_for_running_timer(struct timer_list *timer) base->running_timer != timer); } -# define wakeup_timer_waiters(b) wake_up(&(b)->wait_for_running_timer) +# define wakeup_timer_waiters(b) wake_up_all(&(b)->wait_for_running_timer) #else static inline void wait_for_running_timer(struct timer_list *timer) { @@ -1185,8 +1185,8 @@ static inline void __run_timers(struct tvec_base *base) spin_lock_irq(&base->lock); } } - wakeup_timer_waiters(base); spin_unlock_irq(&base->lock); + wakeup_timer_waiters(base); } #ifdef CONFIG_NO_HZ diff --git a/localversion-rt b/localversion-rt index 4e32122c6b30..ba6e8821d159 100644 --- a/localversion-rt +++ b/localversion-rt @@ -1 +1 @@ --rt118 +-rt119 diff --git a/net/ipv4/icmp.c b/net/ipv4/icmp.c index 028eb47226e8..e232225f7446 100644 --- a/net/ipv4/icmp.c +++ b/net/ipv4/icmp.c @@ -76,6 +76,7 @@ #include <linux/string.h> #include <linux/netfilter_ipv4.h> #include <linux/slab.h> +#include <linux/locallock.h> #include <net/snmp.h> #include <net/ip.h> #include <net/route.h> @@ -202,6 +203,8 @@ static const struct icmp_control icmp_pointers[NR_ICMP_TYPES+1]; * * On SMP we have one ICMP socket per-cpu. */ +static DEFINE_LOCAL_IRQ_LOCK(icmp_sk_lock); + static struct sock *icmp_sk(struct net *net) { return net->ipv4.icmp_sk[smp_processor_id()]; @@ -213,12 +216,14 @@ static inline struct sock *icmp_xmit_lock(struct net *net) local_bh_disable(); + local_lock(icmp_sk_lock); sk = icmp_sk(net); if (unlikely(!spin_trylock(&sk->sk_lock.slock))) { /* This can happen if the output path signals a * dst_link_failure() for an outgoing ICMP packet. */ + local_unlock(icmp_sk_lock); local_bh_enable(); return NULL; } @@ -228,6 +233,7 @@ static inline struct sock *icmp_xmit_lock(struct net *net) static inline void icmp_xmit_unlock(struct sock *sk) { spin_unlock_bh(&sk->sk_lock.slock); + local_unlock(icmp_sk_lock); } /* @@ -298,6 +304,7 @@ static void icmp_push_reply(struct icmp_bxm *icmp_param, struct sock *sk; struct sk_buff *skb; + local_lock(icmp_sk_lock); sk = icmp_sk(dev_net((*rt)->dst.dev)); if (ip_append_data(sk, fl4, icmp_glue_bits, icmp_param, icmp_param->data_len+icmp_param->head_len, @@ -320,6 +327,7 @@ static void icmp_push_reply(struct icmp_bxm *icmp_param, skb->ip_summed = CHECKSUM_NONE; ip_push_pending_frames(sk, fl4); } + local_unlock(icmp_sk_lock); } /* diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c index b4e0eb49f56d..e6345b547922 100644 --- a/net/ipv4/tcp_ipv4.c +++ b/net/ipv4/tcp_ipv4.c @@ -61,6 +61,7 @@ #include <linux/init.h> #include <linux/times.h> #include <linux/slab.h> +#include <linux/locallock.h> #include <net/net_namespace.h> #include <net/icmp.h> @@ -575,6 +576,7 @@ int tcp_v4_gso_send_check(struct sk_buff *skb) return 0; } +static DEFINE_LOCAL_IRQ_LOCK(tcp_sk_lock); /* * This routine will send an RST to the other tcp. * @@ -659,8 +661,11 @@ static void tcp_v4_send_reset(struct sock *sk, struct sk_buff *skb) net = dev_net(skb_dst(skb)->dev); arg.tos = ip_hdr(skb)->tos; + + local_lock(tcp_sk_lock); ip_send_reply(net->ipv4.tcp_sock, skb, ip_hdr(skb)->saddr, &arg, arg.iov[0].iov_len); + local_unlock(tcp_sk_lock); TCP_INC_STATS_BH(net, TCP_MIB_OUTSEGS); TCP_INC_STATS_BH(net, TCP_MIB_OUTRSTS); @@ -734,8 +739,10 @@ static void tcp_v4_send_ack(struct sk_buff *skb, u32 seq, u32 ack, if (oif) arg.bound_dev_if = oif; arg.tos = tos; + local_lock(tcp_sk_lock); ip_send_reply(net->ipv4.tcp_sock, skb, ip_hdr(skb)->saddr, &arg, arg.iov[0].iov_len); + local_unlock(tcp_sk_lock); TCP_INC_STATS_BH(net, TCP_MIB_OUTSEGS); }
