Peter Zijlstra
ba0a6c9f6f
fcntl: add F_[SG]ETOWN_EX
...
In order to direct the SIGIO signal to a particular thread of a
multi-threaded application we cannot, like suggested by the manpage, put a
TID into the regular fcntl(F_SETOWN) call. It will still be send to the
whole process of which that thread is part.
Since people do want to properly direct SIGIO we introduce F_SETOWN_EX.
The need to direct SIGIO comes from self-monitoring profiling such as with
perf-counters. Perf-counters uses SIGIO to notify that new sample data is
available. If the signal is delivered to the same task that generated the
new sample it can augment that data by inspecting the task's user-space
state right after it returns from the kernel. This is esp. convenient
for interpreted or virtual machine driven environments.
Both F_SETOWN_EX and F_GETOWN_EX take a pointer to a struct f_owner_ex
as argument:
struct f_owner_ex {
int type;
pid_t pid;
};
Where type is one of F_OWNER_TID, F_OWNER_PID or F_OWNER_GID.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Reviewed-by: Oleg Nesterov <oleg@redhat.com>
Tested-by: stephane eranian <eranian@googlemail.com>
Cc: Michael Kerrisk <mtk.manpages@googlemail.com>
Cc: Roland McGrath <roland@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-09-24 07:21:01 -07:00
..
bitops
asm-generic: rename atomic.h to atomic-long.h
2009-06-11 21:02:17 +02:00
4level-fixup.h
mm: Pass virtual address to [__]p{te,ud,md}_free_tlb()
2009-07-27 12:10:38 -07:00
atomic-long.h
asm-generic: merge branch 'master' of torvalds/linux-2.6
2009-06-12 11:32:58 +02:00
atomic.h
asm-generic: add generic atomic.h and io.h
2009-06-11 21:02:49 +02:00
atomic64.h
lib: Provide generic atomic64_t implementation
2009-06-15 13:27:38 +10:00
audit_change_attr.h
audit_dir_write.h
audit_read.h
audit_signal.h
audit_write.h
[PATCH] asm/generic: fix bug - kernel fails to build when enable some common audit code on Blackfin
2008-12-09 02:27:39 -05:00
auxvec.h
asm-generic: add generic ABI headers
2009-06-11 21:02:15 +02:00
bitops.h
asm-generic: make bitops.h usable
2009-06-11 21:02:31 +02:00
bitsperlong.h
asm-generic: introduce asm/bitsperlong.h
2009-06-11 21:02:14 +02:00
bug.h
Eliminate thousands of warnings with gcc 3.2 build
2009-05-06 16:36:09 -07:00
bugs.h
asm-generic: add generic versions of common headers
2009-06-11 21:02:37 +02:00
cache.h
asm-generic: add generic NOMMU versions of some headers
2009-06-11 21:02:50 +02:00
cacheflush.h
asm-generic: add generic NOMMU versions of some headers
2009-06-11 21:02:50 +02:00
checksum.h
add generic lib/checksum.c
2009-06-11 21:02:51 +02:00
cmpxchg-local.h
cmpxchg.h
cputime.h
cputime: Optimize jiffies_to_cputime(1)
2009-08-03 14:48:36 +02:00
current.h
asm-generic: add generic versions of common headers
2009-06-11 21:02:37 +02:00
delay.h
asm-generic: add generic versions of common headers
2009-06-11 21:02:37 +02:00
device.h
Driver Core: Add platform device arch data V3
2009-07-22 00:28:38 +02:00
div64.h
dma-coherent.h
dma-mapping-broken.h
dma-mapping: add the device argument to dma_mapping_error()
2008-07-26 12:00:03 -07:00
dma-mapping-common.h
dma-ops: Remove flush_write_buffers() in dma-mapping-common.h
2009-08-10 09:34:57 +02:00
dma.h
asm-generic: add legacy I/O header files
2009-06-11 21:02:42 +02:00
emergency-restart.h
errno-base.h
errno.h
cfg80211: add rfkill support
2009-06-03 14:06:14 -04:00
fb.h
asm-generic: add generic versions of common headers
2009-06-11 21:02:37 +02:00
fcntl.h
fcntl: add F_[SG]ETOWN_EX
2009-09-24 07:21:01 -07:00
futex.h
getorder.h
asm-generic: rename page.h and uaccess.h
2009-06-11 21:02:17 +02:00
gpio.h
gpiolib: allow exported GPIO nodes to be named using sysfs links
2009-09-23 07:39:46 -07:00
hardirq.h
asm-generic: drop HARDIRQ_BITS definition from hardirq.h
2009-06-19 14:58:09 +02:00
hw_irq.h
asm-generic: add legacy I/O header files
2009-06-11 21:02:42 +02:00
ide_iops.h
int-l64.h
asm-generic: introduce asm/bitsperlong.h
2009-06-11 21:02:14 +02:00
int-ll64.h
asm-generic: introduce asm/bitsperlong.h
2009-06-11 21:02:14 +02:00
io.h
asm-generic: add generic atomic.h and io.h
2009-06-11 21:02:49 +02:00
ioctl.h
Make ioctl.h compatible with userland
2008-08-12 16:07:31 -07:00
ioctls.h
asm-generic: add generic ABI headers
2009-06-11 21:02:15 +02:00
iomap.h
ipcbuf.h
asm-generic: add generic sysv ipc headers
2009-06-11 21:02:15 +02:00
irq.h
asm-generic: add generic versions of common headers
2009-06-11 21:02:37 +02:00
irq_regs.h
irqflags.h
asm-generic: add generic versions of common headers
2009-06-11 21:02:37 +02:00
Kbuild
asm-generic: add a generic unistd.h
2009-06-11 21:02:16 +02:00
Kbuild.asm
KVM: export kvm_para.h
2009-09-10 10:46:47 +03:00
kdebug.h
asm-generic: define DIE_OOPS in asm-generic
2008-10-27 11:39:03 +01:00
kmap_types.h
kmap_types.h: rename D macro
2009-09-23 07:39:30 -07:00
libata-portmap.h
linkage.h
asm-generic: add generic versions of common headers
2009-06-11 21:02:37 +02:00
local.h
asm-generic: fix local_add_unless macro
2009-05-18 08:34:08 -07:00
memory_model.h
mm: remove CONFIG_OUT_OF_LINE_PFN_TO_PAGE
2009-01-06 15:59:10 -08:00
mm_hooks.h
mman-common.h
ksm: define MADV_MERGEABLE and MADV_UNMERGEABLE
2009-09-22 07:17:31 -07:00
mman.h
mm: add MAP_HUGETLB for mmaping pseudo-anonymous huge page regions
2009-09-22 07:17:41 -07:00
mmu.h
asm-generic: add generic NOMMU versions of some headers
2009-06-11 21:02:50 +02:00
mmu_context.h
asm-generic: add generic NOMMU versions of some headers
2009-06-11 21:02:50 +02:00
module.h
asm-generic: add generic versions of common headers
2009-06-11 21:02:37 +02:00
msgbuf.h
asm-generic: add generic sysv ipc headers
2009-06-11 21:02:15 +02:00
mutex-dec.h
mutex: speed up generic mutex implementations
2008-10-23 09:18:20 -07:00
mutex-null.h
mutex-xchg.h
mutex: speed up generic mutex implementations
2008-10-23 09:18:20 -07:00
mutex.h
asm-generic: add generic versions of common headers
2009-06-11 21:02:37 +02:00
page.h
asm-generic: add generic NOMMU versions of some headers
2009-06-11 21:02:50 +02:00
param.h
asm-generic: add generic ABI headers
2009-06-11 21:02:15 +02:00
parport.h
asm-generic: add legacy I/O header files
2009-06-11 21:02:42 +02:00
pci-dma-compat.h
dma-mapping: add the device argument to dma_mapping_error()
2008-07-26 12:00:03 -07:00
pci.h
PCI: remove pcibios_scan_all_fns()
2009-09-09 13:29:18 -07:00
percpu.h
x86/i386: Put aligned stack-canary in percpu shared_aligned section
2009-09-04 07:10:31 +02:00
pgalloc.h
asm-generic: add generic NOMMU versions of some headers
2009-06-11 21:02:50 +02:00
pgtable-nopmd.h
mm: Pass virtual address to [__]p{te,ud,md}_free_tlb()
2009-07-27 12:10:38 -07:00
pgtable-nopud.h
mm: Pass virtual address to [__]p{te,ud,md}_free_tlb()
2009-07-27 12:10:38 -07:00
pgtable.h
asm-generic: add dummy pgprot_noncached()
2009-06-23 14:34:30 +02:00
poll.h
posix_types.h
asm-generic: add generic ABI headers
2009-06-11 21:02:15 +02:00
resource.h
rtc.h
asm-generic: make get_rtc_time overridable
2009-06-11 21:02:18 +02:00
scatterlist.h
asm-generic: add generic versions of common headers
2009-06-11 21:02:37 +02:00
sections.h
asm/sections: add text/data checking functions for arches to override
2009-09-23 07:39:30 -07:00
segment.h
asm-generic: add generic NOMMU versions of some headers
2009-06-11 21:02:50 +02:00
sembuf.h
asm-generic: add generic sysv ipc headers
2009-06-11 21:02:15 +02:00
serial.h
asm-generic: add legacy I/O header files
2009-06-11 21:02:42 +02:00
setup.h
asm-generic: add generic ABI headers
2009-06-11 21:02:15 +02:00
shmbuf.h
asm-generic: add generic sysv ipc headers
2009-06-11 21:02:15 +02:00
shmparam.h
asm-generic: add generic sysv ipc headers
2009-06-11 21:02:15 +02:00
siginfo.h
asm-generic/siginfo.h: update NSIGTRAP definition
2009-04-13 15:04:30 -07:00
signal-defs.h
asm-generic: rename termios.h, signal.h and mman.h
2009-06-11 21:01:52 +02:00
signal.h
asm-generic: add generic ABI headers
2009-06-11 21:02:15 +02:00
socket.h
net: implement a SO_DOMAIN getsockoption
2009-08-05 13:02:57 -07:00
sockios.h
asm-generic: add generic ABI headers
2009-06-11 21:02:15 +02:00
spinlock.h
asm-generic: add generic versions of common headers
2009-06-11 21:02:37 +02:00
stat.h
asm-generic: add generic ABI headers
2009-06-11 21:02:15 +02:00
statfs.h
remove __KERNEL_STRICT_NAMES
2009-03-26 18:14:21 +01:00
string.h
asm-generic: add generic versions of common headers
2009-06-11 21:02:37 +02:00
swab.h
asm-generic: add generic ABI headers
2009-06-11 21:02:15 +02:00
syscall.h
asm-generic: syscall_get_nr returns int
2009-09-22 19:56:50 -07:00
syscalls.h
asm-generic: add generic versions of common headers
2009-06-11 21:02:37 +02:00
system.h
asm-generic: add generic versions of common headers
2009-06-11 21:02:37 +02:00
termbits.h
asm-generic: add generic ABI headers
2009-06-11 21:02:15 +02:00
termios-base.h
asm-generic: rename termios.h, signal.h and mman.h
2009-06-11 21:01:52 +02:00
termios.h
asm-generic: add generic ABI headers
2009-06-11 21:02:15 +02:00
timex.h
asm-generic: add legacy I/O header files
2009-06-11 21:02:42 +02:00
tlb.h
mm: Pass virtual address to [__]p{te,ud,md}_free_tlb()
2009-07-27 12:10:38 -07:00
tlbflush.h
asm-generic: add generic NOMMU versions of some headers
2009-06-11 21:02:50 +02:00
topology.h
cpumask: remove obsolete node_to_cpumask now everyone uses cpumask_of_node
2009-09-24 09:34:34 +09:30
types.h
asm-generic: add generic ABI headers
2009-06-11 21:02:15 +02:00
uaccess-unaligned.h
asm-generic: rename page.h and uaccess.h
2009-06-11 21:02:17 +02:00
uaccess.h
asm-generic: uaccess: fix up local access_ok() usage
2009-06-19 14:58:08 +02:00
ucontext.h
asm-generic: add generic ABI headers
2009-06-11 21:02:15 +02:00
unaligned.h
asm-generic: add generic versions of common headers
2009-06-11 21:02:37 +02:00
unistd.h
perf: Do the big rename: Performance Counters -> Performance Events
2009-09-21 14:28:04 +02:00
user.h
asm-generic: add generic versions of common headers
2009-06-11 21:02:37 +02:00
vga.h
asm-generic: add legacy I/O header files
2009-06-11 21:02:42 +02:00
vmlinux.lds.h
Merge branch 'linus' into tracing/core
2009-09-17 20:53:10 +02:00
xor.h