Joe Peterson
a88a69c912
n_tty: Fix loss of echoed characters and remove bkl from n_tty ...
Fixes the loss of echoed (and other ldisc-generated characters) when
the tty is stopped or when the driver output buffer is full (happens
frequently for input during continuous program output, such as ^C)
and removes the Big Kernel Lock from the N_TTY line discipline.
Adds an "echo buffer" to the N_TTY line discipline that handles all
ldisc-generated output (including echoed characters). Along with the
loss of characters, this also fixes the associated loss of sync between
tty output and the ldisc state when characters cannot be immediately
written to the tty driver.
The echo buffer stores (in addition to characters) state operations that need
to be done at the time of character output (like management of the column
position). This allows echo to cooperate correctly with program output,
since the ldisc state remains consistent with actual characters written.
Since the echo buffer code now isolates the tty column state code
to the process_out* and process_echoes functions, we can remove the
Big Kernel Lock (BKL) and replace it with mutex locks.
Highlights are:
* Handles echo (and other ldisc output) when tty driver buffer is full
- continuous program output can block echo
* Saves echo when tty is in stopped state (e.g. ^S)
- (e.g.: ^Q will correctly cause held characters to be released for output)
* Control character pairs (e.g. "^C") are treated atomically and not
split up by interleaved program output
* Line discipline state is kept consistent with characters sent to
the tty driver
* Remove the big kernel lock (BKL) from N_TTY line discipline
Signed-off-by: Joe Peterson <joe@skyrush.com>
Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-01-02 10:19:35 -08:00
byteorder: provide swabb.h generically in asm/byteorder.h
2008-10-20 08:52:40 -07:00
can: Fix CAN_(EFF|RTR)_FLAG handling in can_filter
2008-12-03 15:52:35 -08:00
V4L/DVB (9196): Add support for DSS delivery
2008-10-17 17:15:43 -03:00
mfd: twl4030 IRQ handling update
2008-10-22 01:19:37 +02:00
NLM: allow lockd requests from an unprivileged port
2008-12-23 15:21:38 -05:00
ASoC: Add WM8350 AudioPlus codec driver
2008-12-18 17:21:07 +00:00
mlx4_core: Add support for multiple completion event vectors
2008-12-22 07:15:03 -08:00
mmc: struct device - replace bus_id with dev_name(), dev_set_name()
2008-11-08 21:37:46 +01:00
[MTD] [NOR] Fix cfi_send_gen_cmd handling of x16 devices in x8 mode (v4)
2008-11-05 14:40:25 +01:00
netfilter: ctnetlink: fix missing CTA_NAT_SEQ_UNSPEC
2008-12-16 01:19:41 -08:00
netfilter: netns ebtables: part 2
2008-11-04 14:27:15 +01:00
netfilter: ip{,6}t_policy.h should include xp_policy.h
2008-11-20 15:59:56 +01:00
netfilter: ip{,6}t_policy.h should include xp_policy.h
2008-11-20 15:59:56 +01:00
nfsd: support callbacks with gss flavors
2008-12-23 16:19:00 -05:00
md: use sysfs_notify_dirent to notify changes to md/dev-xxx/state
2008-10-21 13:25:28 +11:00
spi: fix compile error
2008-10-30 11:38:47 -07:00
ssb: Fix DMA-API compilation for non-PCI systems
2008-11-10 13:50:19 -08:00
Merge branch 'devel' into next
2008-12-30 16:51:43 -05:00
USB: fix comment about endianness of descriptors
2008-12-17 10:49:14 -08:00
Merge branch 'video' into release
2008-11-11 21:15:50 -05:00
PCI: fix AER capability check
2008-10-20 11:01:52 -07:00
aio: make the lookup_ioctx() lockless
2008-12-29 08:29:50 +01:00
atm: 32-bit ioctl compatibility
2008-12-03 22:12:38 -08:00
atm: 32-bit ioctl compatibility
2008-12-03 22:12:38 -08:00
Merge branch 'next' into for-linus
2008-12-25 11:40:09 +11:00
vmscan: split LRU lists into anon & file sets
2008-10-20 08:50:25 -07:00
include/linux/bcd.h: remove comments
2008-10-20 08:52:42 -07:00
CRED: Make execve() take advantage of copy-on-write credentials
2008-11-14 10:39:24 +11:00
bio: add support for inlining a number of bio_vecs inside the bio
2008-12-29 08:29:50 +01:00
Merge branch 'for-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/dvrabel/uwb
2008-10-23 08:20:34 -07:00
block: get rid of elevator_t typedef
2008-12-29 08:29:50 +01:00
blktrace: port to tracepoints
2008-11-26 12:13:34 +01:00
softirq: remove useless function __local_bh_enable
2008-11-28 12:38:38 +01:00
block: Supress Buffer I/O errors when SCSI REQ_QUIET flag set
2008-12-29 08:28:44 +01:00
Add c2 port support
2008-11-12 17:17:18 -08:00
CRED: Inaugurate COW credentials
2008-11-14 10:39:23 +11:00
[PATCH] switch cdrom_{open,release,ioctl} to sane APIs
2008-10-21 07:47:22 -04:00
cgroups: tiny cleanups
2008-10-30 11:38:45 -07:00
pkt_sched: Control group classifier
2008-11-07 22:56:00 -08:00
clarify usage expectations for cnt32_to_63()
2008-11-09 11:17:33 -08:00
remove __ARCH_WANT_COMPAT_SYS_PTRACE
2008-11-30 11:00:15 -08:00
trace: profile all if conditionals
2008-11-23 11:41:01 +01:00
DRM: add mode setting support
2008-12-29 17:47:23 +10:00
cpumask: introduce new API, without changing anything, v3
2008-11-09 21:09:54 +01:00
cpuset: update top cpuset's mems after adding a node
2008-11-19 18:49:58 -08:00
proc: move /proc/vmcore creation to fs/proc/vmcore.c
2008-10-23 18:51:22 +04:00
libcrc32c: Add crc32c_le macro
2008-12-25 11:01:43 +11:00
User namespaces: set of cleanups (v2)
2008-11-24 18:57:41 -05:00
crypto: hash - Export shash through hash
2008-12-25 11:01:33 +11:00
shrink struct dentry
2008-12-31 18:07:38 -05:00
net: add DCNA attribute to the BCN interface for DCB
2008-12-21 20:10:29 -08:00
dccp ccid-2: Phase out the use of boolean Ack Vector sysctl
2008-12-08 01:19:06 -08:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/viro/bdev
2008-10-23 10:23:07 -07:00
i2c: Constify i2c_get_clientdata's parameter
2008-10-22 20:21:31 +02:00
dm raid1: separate region_hash interface part1
2008-10-21 17:45:06 +01:00
intel-iommu: IA64 support
2008-10-18 14:29:15 +01:00
DMI: add dmi_match
2008-12-29 07:39:34 -05:00
block: get rid of elevator_t typedef
2008-12-29 08:29:50 +01:00
eth: Declare an optimized compare_ether_addr_64bits() function
2008-11-23 23:24:32 -08:00
ethtool: Add GGRO and SGRO ops
2008-12-15 23:44:31 -08:00
ext3: add an option to control error handling on file data
2008-10-20 08:52:37 -07:00
SLUB: failslab support
2008-12-29 11:27:46 +02:00
fb: SH-5 uses __raw I/O accessors now also, drop the special casing.
2008-12-22 18:44:05 +09:00
fddi: convert to new network device ops
2008-11-20 20:29:48 -08:00
filp_cachep can be static in fs/file_table.c
2008-12-31 18:07:42 -05:00
[PATCH] introduce fmode_t, do annotations
2008-10-21 07:47:06 -04:00
filter: add SKF_AD_NLATTR_NEST to look for nested attributes
2008-11-20 00:49:27 -08:00
freezer_cg: use thaw_process() in unfreeze_cgroup()
2008-10-30 11:38:45 -07:00
nfsd/create race fixes, infrastructure
2008-12-31 18:07:43 -05:00
take init_fs to saner place
2008-12-31 18:07:42 -05:00
gianfar: Convert gianfar to an of_platform_driver
2008-12-16 15:29:15 -08:00
[PATCH] introduce fmode_t, do annotations
2008-10-21 07:47:06 -04:00
ftrace: enable format arguments checking
2008-12-21 09:46:45 +01:00
tracing/function-return-tracer: change the name into function-graph-tracer
2008-11-26 01:59:45 +01:00
futex: make clock selectable for FUTEX_WAIT_BITSET
2008-11-24 20:00:40 +01:00
block: add one-hit cache for disk partition lookup
2008-12-29 08:29:51 +01:00
Merge branch 'core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2008-12-30 16:10:19 -08:00
netdevice: Kill netdev->priv
2008-12-08 01:14:16 -08:00
HID: fix oops during suspend of unbound HID devices
2008-10-27 15:06:01 +01:00
Allow architectures to override copy_user_highpage()
2008-11-27 23:39:48 +00:00
hippi: convert driver to net_device_ops
2008-11-20 20:32:15 -08:00
hrtimer: removing all ur callback modes
2008-11-25 15:45:46 +01:00
proc: switch /proc/meminfo to seq_file
2008-10-23 13:52:40 +04:00
i2c-algo-pcf: Add adapter hooks around xfer begin and end
2008-10-22 20:21:30 +02:00
V4L/DVB (9240): saa7127: Fix two typos
2008-10-17 17:25:11 -03:00
i2c: Add info->archdata field
2008-10-22 20:21:33 +02:00
i7300_idle: Disable ioat channel only on platforms where ile driver can load
2008-10-24 12:54:18 -04:00
ide: move Power Management support to ide-pm.c
2008-12-29 20:27:37 +01:00
lib/idr.c: fix rcu related race with idr_find
2008-12-01 19:55:25 -08:00
wireless: Incorrect LEAP authentication algorithm identifier.
2008-12-12 13:48:20 -05:00
bonding, net: Move last_rx update into bonding recv logic
2008-11-03 18:16:50 -08:00
Phonet: allocate separate ARP type for GPRS over a Phonet pipe
2008-12-17 15:47:48 -08:00
net: fix packet socket delivery in rx irq handler
2008-11-04 14:49:57 -08:00
TPROXY: implemented IP_RECVORIGDSTADDR socket option
2008-11-16 19:32:39 -08:00
adjust init section definitions
2008-10-29 22:02:09 +01:00
take init_fs to saner place
2008-12-31 18:07:42 -05:00
Fix inotify watch removal/umount races
2008-11-15 12:26:44 -08:00
Merge branch 'topic/jack-mechanical' into to-push
2008-12-25 11:40:29 +01:00
intel-iommu: IA64 support
2008-10-18 14:29:15 +01:00
Merge branch 'irq-fixes-for-linus-4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2008-12-31 09:00:59 -08:00
io mapping: clean up #ifdefs
2008-11-03 18:21:45 +01:00
ipv6: Add IPV6_PKTINFO sticky option support to setsockopt()
2008-12-16 02:06:23 -08:00
sparseirq: move __weak symbols into separate compilation unit
2008-12-29 12:15:49 +01:00
irq: simplify for_each_irq_desc() usage
2008-12-26 09:48:18 +01:00
jbd: fix error handling for checkpoint io
2008-10-23 08:55:01 -07:00
ext4: Replace hackish ext4_mb_poll_new_transaction with commit callback
2008-10-16 20:00:24 -04:00
optimize attribute timeouts for "noac" and "actimeo=0"
2008-12-23 15:21:56 -05:00
sparse irqs: add irqnr.h to the user headers list
2008-12-12 12:29:10 +01:00
Merge branch 'core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2008-12-30 16:10:19 -08:00
sparse irq_desc[] array: core kernel and x86 changes
2008-12-08 14:31:51 +01:00
kexec/i386: allocate page table pages dynamically
2008-10-31 10:01:56 +01:00
CRED: Make execve() take advantage of copy-on-write credentials
2008-11-14 10:39:24 +11:00
KEYS: Alter use of key instantiation link-to-keyring argument
2008-11-14 10:39:14 +11:00
KVM: Future-proof device assignment ABI
2008-10-28 14:22:15 +02:00
KVM: Fix guest shared interrupt with in-kernel irqchip
2008-10-28 14:21:34 +02:00
leds: Make default trigger fields const
2008-10-20 22:34:12 +01:00
lguest: move the initial guest page table creation code to the host
2008-12-30 09:26:11 +10:30
libata: perform port detach in EH
2008-12-28 22:43:21 -05:00
i386: get rid of the use of KPROBE_ENTRY / KPROBE_END
2008-11-27 12:37:54 +01:00
rcu: Introduce hlist_nulls variant of hlist
2008-11-16 19:37:55 -08:00
Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2008-12-30 16:20:19 -08:00
markers: comment marker_synchronize_unregister() on data dependency
2008-11-28 16:47:41 +01:00
phylib: make mdio-gpio work without OF (v4)
2008-11-16 18:59:45 -08:00
memcg: allocate all page_cgroup at boot
2008-10-20 08:52:39 -07:00
hotplug_memory_notifier section annotation
2008-11-30 10:03:38 -08:00
vmscan: move isolate_lru_page() to vmscan.c
2008-10-20 08:50:25 -07:00
net: Refactor full duplex flow control resolution
2008-12-16 02:00:48 -08:00
Merge branch 'tracing-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2008-12-28 12:21:10 -08:00
vmscan: kill unused lru functions
2008-10-20 08:52:31 -07:00
aio: make the lookup_ioctx() lockless
2008-12-29 08:29:50 +01:00
memcg: allocate all page_cgroup at boot
2008-10-20 08:52:39 -07:00
HID: fix hid_device_id for cross compiling
2008-10-29 00:51:25 +01:00
param: Fix duplicate module prefixes
2008-10-22 10:00:23 +11:00
core_param() for genuinely core kernel parameters
2008-10-22 10:00:23 +11:00
netns: ip6mr: enable namespace support in ipv6 multicast forwarding code
2008-12-10 16:30:15 -08:00
fat: Cleanup FAT attribute stuff
2008-11-06 15:41:21 -08:00
x86, MSI: pass irq_cfg and irq_desc
2008-12-08 14:31:59 +01:00
mutex: improve header comment to be actually informative about the API
2008-10-30 19:55:00 +01:00
vfs: introduce helper function to safely NUL-terminate symlinks
2008-12-31 18:07:38 -05:00
reintroduce accept4
2008-11-19 18:49:57 -08:00
net: Remove unused netdev arg from some NAPI interfaces.
2008-12-22 20:43:12 -08:00
netlink: avoid memset of 0 bytes sparse warning
2008-11-20 04:08:29 -08:00
net: Add Generic Receive Offload infrastructure
2008-12-15 23:38:52 -08:00
optimize attribute timeouts for "noac" and "actimeo=0"
2008-12-23 15:21:56 -05:00
NFSv4: Remove nfs_client->cl_sem
2008-12-23 15:21:45 -05:00
NFS: add "[no]resvport" mount option
2008-12-23 15:21:37 -05:00
NFSv4: Convert the open and close ops to use fmode
2008-12-23 15:21:56 -05:00
mac80211: Fix HT channel selection
2008-12-19 15:22:54 -05:00
User namespaces: set of cleanups (v2)
2008-11-24 18:57:41 -05:00
of: Add helpers for finding device nodes which have a given property
2008-11-19 16:05:00 +11:00
of/gpio: Implement of_gpio_count()
2008-12-21 14:21:14 +11:00
of: Fix comment, sparc no longer uses of_device objects on special busses.
2008-12-04 09:16:45 -08:00
oprofile: update comment for oprofile_add_sample()
2008-12-10 14:20:03 +01:00
mlock: mlocked pages are unevictable
2008-10-20 08:52:30 -07:00
meminit section warnings
2008-11-30 10:03:35 -08:00
mm: page lock use lock bitops
2008-10-20 08:52:32 -07:00
Unevictable LRU Infrastructure
2008-10-20 08:50:26 -07:00
Merge branches 'x86/apic', 'x86/cleanups', 'x86/cpufeature', 'x86/crashdump', 'x86/debug', 'x86/defconfig', 'x86/detect-hyper', 'x86/doc', 'x86/dumpstack', 'x86/early-printk', 'x86/fpu', 'x86/idle', 'x86/io', 'x86/memory-corruption-check', 'x86/microcode', 'x86/mm', 'x86/mtrr', 'x86/nmi-watchdog', 'x86/pat2', 'x86/pci-ioapic-boot-irq-quirks', 'x86/ptrace', 'x86/quirks', 'x86/reboot', 'x86/setup-memory', 'x86/signal', 'x86/sparse-fixes', 'x86/time', 'x86/uv' and 'x86/xen' into x86/core
2008-12-23 16:27:23 +01:00
PCI: Hotplug core: remove 'name'
2008-10-22 16:42:43 -07:00
Merge commit 'v2.6.28-rc2' into x86/pci-ioapic-boot-irq-quirks
2008-10-28 16:26:12 +01:00
PCI: add support for function level reset
2008-10-22 16:42:35 -07:00
revert "percpu_counter: new function percpu_counter_sum_and_set"
2008-12-10 08:01:52 -08:00
Phonet: do not reply to indication reset packets
2008-10-26 23:07:25 -07:00
phy: power management support
2008-11-28 16:24:56 -08:00
pid: fix the do_each_pid_task() macro
2008-12-04 09:09:37 +01:00
pkt_sched: Control group classifier
2008-11-07 22:56:00 -08:00
pkt_sched: add DRR scheduler
2008-11-20 04:10:00 -08:00
Merge branch 'linus' into test
2008-10-23 00:11:07 -04:00
posix-timers: use "struct pid*" instead of "struct task_struct*"
2008-12-12 17:00:07 +01:00
proc: remove fs/proc/proc_misc.c
2008-10-23 18:54:05 +04:00
profiling: fix up CONFIG_PROC_FS=n build
2008-10-23 08:55:01 -07:00
x86, bts: add fork and exit handling
2008-12-20 09:15:46 +01:00
sparse irqs: handle !GENIRQ platforms
2008-12-12 12:28:50 +01:00
remove ratelimt()
2008-11-12 17:17:17 -08:00
rcu: increase RCU stall-check timeouts
2008-11-03 18:36:48 +01:00
udp: Use hlist_nulls in UDP RCU code
2008-11-16 19:39:21 -08:00
rcu: Introduce hlist_nulls variant of hlist
2008-11-16 19:37:55 -08:00
Merge branch 'core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2008-12-30 16:10:19 -08:00
"Tree RCU": scalable classic RCU implementation
2008-12-18 21:56:04 +01:00
[PATCH] remember mode of reiserfs journal
2008-10-21 07:49:04 -04:00
mm: increase the default mlock limit from 32k to 64k
2008-10-30 11:38:45 -07:00
rfkill: strip pointless notifier chain
2008-12-12 14:45:25 -05:00
Merge branch 'oprofile-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2008-12-30 17:31:25 -08:00
rapidio: struct device - replace bus_id with dev_name(), dev_set_name()
2008-12-16 15:53:41 +11:00
make mm/rmap.c:anon_vma_cachep static
2008-10-20 08:52:40 -07:00
ixgbe: this patch adds support for DCB to the kernel and ixgbe driver
2008-11-20 20:52:10 -08:00
Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2008-12-28 12:27:58 -08:00
CRED: Wrap current->cred and a few other accessors
2008-11-14 10:39:18 +11:00
introduce new LSM hooks where vfsmount is available.
2008-12-31 18:07:37 -05:00
vfs, seqfile: make mangle_path() global
2008-11-23 09:45:39 +01:00
[ARM] S3C6400: serial support for S3C6400 and S3C6410 SoCs
2008-12-15 21:58:11 +00:00
net: Add skb_gro_receive
2008-12-15 23:42:33 -08:00
Merge branches 'topic/fixes', 'topic/cleanups' and 'topic/documentation' into for-linus
2008-12-29 11:45:47 +02:00
smc911x: Add IRQ polarity configuration
2008-10-22 07:00:38 -04:00
Define smp_call_function_many for UP
2008-12-15 16:28:57 -08:00
smsc911x: add dynamic bus configuration
2008-12-10 15:12:45 -08:00
tcp: add some mibs to track collapsing
2008-11-24 21:27:22 -08:00
tracing/stack-tracer: introduce CONFIG_USER_STACKTRACE_SUPPORT
2008-11-23 11:53:50 +01:00
linux/string.h: fix comment typo
2008-11-02 10:15:07 -08:00
byteorder: use generic C version for value byteswapping
2008-10-20 08:52:40 -07:00
vmscan: unevictable LRU scan sysctl
2008-10-20 08:52:31 -07:00
swiotlb: add arch hook to force mapping
2008-12-17 18:58:13 +01:00
reintroduce accept4
2008-11-19 18:49:57 -08:00
x86: sysfs: kill owner field from attribute
2008-10-20 08:52:42 -07:00
telephony: trivial: fix up email address
2008-11-11 09:30:23 -08:00
NOHZ: unify the nohz function calls in irq_enter()
2008-10-17 18:13:38 +02:00
Merge branch 'timers/range-hrtimers' into v28-range-hrtimers-for-linus-v2
2008-10-22 09:48:06 +02:00
Add round_jiffies_up and related routines
2008-11-06 08:42:48 +01:00
linux/timex.h: cleanup for userspace
2008-12-12 17:01:38 +01:00
sched: let arch_update_cpu_topology indicate if topology changed
2008-12-12 13:47:21 +01:00
tracepoints: add DECLARE_TRACE() and DEFINE_TRACE()
2008-11-16 09:01:36 +01:00
n_tty: Fix loss of echoed characters and remove bkl from n_tty
2009-01-02 10:19:35 -08:00
Get rid of CONFIG_LSF
2008-12-29 08:29:51 +01:00
USB: don't register endpoints for interfaces that are going away
2008-11-13 14:45:00 -08:00
User namespaces: set of cleanups (v2)
2008-11-24 18:57:41 -05:00
V4L/DVB (10078): video: add NV16 and NV61 pixel formats
2008-12-30 09:40:20 -02:00
virtio: avoid implicit use of Linux page size in balloon interface
2008-12-30 09:26:04 +10:30
virtio_console: support console resizing
2008-12-30 09:26:10 +10:30
virtio_net: VIRTIO_NET_F_MSG_RXBUF (imprive rcv buffer allocation)
2008-11-16 22:41:34 -08:00
virtio: Don't use PAGE_SIZE for vring alignment in virtio_pci.
2008-12-30 09:25:58 +10:30
virtio: hand virtio ring alignment as argument to vring_new_virtqueue
2008-12-30 09:26:03 +10:30
proc: move /proc/vmallocinfo to mm/vmalloc.c
2008-10-23 15:48:28 +04:00
proc: move /proc/zoneinfo boilerplate to mm/vmstat.c
2008-10-23 17:35:04 +04:00
cpumask: introduce new API, without changing anything
2008-11-06 09:05:33 +01:00
xfrm: Notify changes in UDP encapsulation via netlink
2008-10-28 16:01:07 -07:00
