04: read: 1; total=84
> 341.004: read: 1; total=85
> ^C
> ==
>
> The after bringing the program back into the foreground, I would have
> expected to get an overrun count of 334 or thereabouts, but it looks as
> though I'm only getting the least significant byte
expected to get an overrun count of 334 or thereabouts, but it looks as
though I'm only getting the least significant byte from read(2).
Cheers,
Michael
[...]
put_user copies sizeof(*ptr) bytes to user space.
Signed-off-by: Davi Arnaut [EMAIL PROTECTED]
diff --git a/fs/timerfd.c b/fs
Davide Libenzi wrote:
> On Mon, 21 May 2007, Oleg Nesterov wrote:
>
>>> + schedule();
>>> + locked = signalfd_lock(ctx, );
>>> + if (unlikely(!locked)) {
>>> + /*
>>> +* Let the caller read zero byte, ala socket
>>> +
Christoph Hellwig wrote:
> On Sun, May 20, 2007 at 12:40:11AM -0300, Davi Arnaut wrote:
>> Hi,
>>
>> Shrink task_struct by replacing the notifier callback with a
>> notifier list. The block_all_signals() function (and the signal
>> notifier mechanism) has only one
Christoph Hellwig wrote:
On Sun, May 20, 2007 at 12:40:11AM -0300, Davi Arnaut wrote:
Hi,
Shrink task_struct by replacing the notifier callback with a
notifier list. The block_all_signals() function (and the signal
notifier mechanism) has only one user at the moment, which is drm
Davide Libenzi wrote:
On Mon, 21 May 2007, Oleg Nesterov wrote:
+ schedule();
+ locked = signalfd_lock(ctx, lk);
+ if (unlikely(!locked)) {
+ /*
+* Let the caller read zero byte, ala socket
+* recv()
Hi,
Shrink task_struct by replacing the notifier callback with a
notifier list. The block_all_signals() function (and the signal
notifier mechanism) has only one user at the moment, which is drm.
Pahole output for task_struct:
i386 before:
/* size: 2640, cachelines: 42 */
/* sum members:
Hi,
Gathering signals in bulk enables server applications to drain a signal
queue (almost full of realtime signals) more efficiently by reducing the
syscall and file look-up overhead.
Very similar to the sigtimedwait4() call described by Niels Provos,
Chuck Lever, and Stephen Tweedie in a paper
Hi,
Gathering signals in bulk enables server applications to drain a signal
queue (almost full of realtime signals) more efficiently by reducing the
syscall and file look-up overhead.
Very similar to the sigtimedwait4() call described by Niels Provos,
Chuck Lever, and Stephen Tweedie in a paper
Hi,
Shrink task_struct by replacing the notifier callback with a
notifier list. The block_all_signals() function (and the signal
notifier mechanism) has only one user at the moment, which is drm.
Pahole output for task_struct:
i386 before:
/* size: 2640, cachelines: 42 */
/* sum members:
Hi,
poll_wait() callback may modify the waitqueue without holding the
context private lock.
Signed-off-by: Davi E. M. Arnaut <[EMAIL PROTECTED]>
diff --git a/fs/eventfd.c b/fs/eventfd.c
index 480e2b3..9c672be 100644
--- a/fs/eventfd.c
+++ b/fs/eventfd.c
@@ -50,7 +50,7 @@ int
Hi,
poll_wait() callback may modify the waitqueue without holding the
context private lock.
Signed-off-by: Davi E. M. Arnaut [EMAIL PROTECTED]
diff --git a/fs/eventfd.c b/fs/eventfd.c
index 480e2b3..9c672be 100644
--- a/fs/eventfd.c
+++ b/fs/eventfd.c
@@ -50,7 +50,7 @@ int eventfd_signal(struct
Ulrich Drepper wrote:
> On 5/7/07, Davi Arnaut <[EMAIL PROTECTED]> wrote:
>> Anyway, we could extend epoll to be mmapable...
>
> Welcome to kevent, well, except with a lot more ballast and awkward
> interfaces.
So an mmapable epoll is equivalent to kevent.. great! Well
Ulrich Drepper wrote:
> On 5/7/07, Davi Arnaut <[EMAIL PROTECTED]> wrote:
>> See Linus's message on this same thread.
>
> No. I'm talking about the userlevel side, not kernel side.
So you probably knew the answer before asking the question.
> If a thread is canceled
Ulrich Drepper wrote:
> On 5/5/07, Davi Arnaut <[EMAIL PROTECTED]> wrote:
>> A google search turns up a few users. It also addresses some complaints
>> from Drepper.
>
> There is a huge problem with this approach and we're back at the
> inadequate interface.
>
Ulrich Drepper wrote:
On 5/5/07, Davi Arnaut [EMAIL PROTECTED] wrote:
A google search turns up a few users. It also addresses some complaints
from Drepper.
There is a huge problem with this approach and we're back at the
inadequate interface.
select/poll/epoll are thread cancellation
Ulrich Drepper wrote:
On 5/7/07, Davi Arnaut [EMAIL PROTECTED] wrote:
See Linus's message on this same thread.
No. I'm talking about the userlevel side, not kernel side.
So you probably knew the answer before asking the question.
If a thread is canceled *after* it returns from the syscall
Ulrich Drepper wrote:
On 5/7/07, Davi Arnaut [EMAIL PROTECTED] wrote:
Anyway, we could extend epoll to be mmapable...
Welcome to kevent, well, except with a lot more ballast and awkward
interfaces.
So an mmapable epoll is equivalent to kevent.. great! Well, expect
without a whole new giant
machinery is
not necessary. And it makes me wonder why I hadn't followed its "watch"
approach for futexes:
futex_init(); // Davide's anon fd
futex_add_watch(int fd, void *addr, int val, uint32_t mask);
futex_rm_watch(int fd, uint32_t wd);
Anyway, this unifying event machinery can be built
anon fd
futex_add_watch(int fd, void *addr, int val, uint32_t mask);
futex_rm_watch(int fd, uint32_t wd);
Anyway, this unifying event machinery can be built, if needed, in user
space by libevent and others.
--
Davi Arnaut
-
To unsubscribe from this list: send the line unsubscribe linux-kernel
Davide Libenzi wrote:
> On Fri, 4 May 2007, Davi Arnaut wrote:
>
>> Hi,
>>
>> If multiple threads are parked on epoll_wait (on a single epoll fd) and
>> events become available, epoll performs a wake up of all threads of the
>> poll wait list, causing a thunder
Davide Libenzi wrote:
On Fri, 4 May 2007, Davi Arnaut wrote:
Hi,
If multiple threads are parked on epoll_wait (on a single epoll fd) and
events become available, epoll performs a wake up of all threads of the
poll wait list, causing a thundering herd of processes trying to grab
Hi,
If multiple threads are parked on epoll_wait (on a single epoll fd) and
events become available, epoll performs a wake up of all threads of the
poll wait list, causing a thundering herd of processes trying to grab
the eventpoll lock.
This patch addresses this by using exclusive waiters (wake
Hi,
If multiple threads are parked on epoll_wait (on a single epoll fd) and
events become available, epoll performs a wake up of all threads of the
poll wait list, causing a thundering herd of processes trying to grab
the eventpoll lock.
This patch addresses this by using exclusive waiters (wake
Thomas Gleixner wrote:
> On Wed, 2007-05-02 at 02:22 -0300, Davi Arnaut wrote:
>> plain text document attachment (pollfs-timer.patch)
>> Per file descriptor high-resolution timers. A classic unix file interface for
>> the POSIX timer_(create|settime|gettime|delete
Davide Libenzi wrote:
On Wed, 2 May 2007, Davi Arnaut wrote:
So in this case I may borrow some signalfd code :-) I really like the
signalfd approach, but IMHO the code is quite ugly and duplicates
a lot of hairy code.
Ugly, really? Please ...
+ while (!mutex_trylock(>mu
Davide Libenzi wrote:
On Wed, 2 May 2007, Davi Arnaut wrote:
Davide Libenzi wrote:
On Tue, 1 May 2007, Andrew Morton wrote:
David, could you provide some feedback please? The patches are stunningly
free of comments, but you used to do that to me pretty often so my
Ulrich Drepper wrote:
On 5/2/07, Davi Arnaut <[EMAIL PROTECTED]> wrote:
NO! Every single waiter of the _file descriptor_ is waked, not of the
futex.
And how is this better? In this world of yours a program must have
one file descriptor for each single futex which is used like thi
).
--
Davi Arnaut
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [EMAIL PROTECTED]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Ulrich Drepper wrote:
On 5/2/07, Davi Arnaut <[EMAIL PROTECTED]> wrote:
thread A:
int fd = plfutex(addr, 0);
do
poll(fdset+fd);
process network events
queue obj to thread B
if fd:
job processed
thread B:
wait_job();
proce
Ulrich Drepper wrote:
On 5/2/07, Davi Arnaut <[EMAIL PROTECTED]> wrote:
It's quite easy to implement this scheme by write()ing the futexes all
at once but that would break the one futex per fd association. For
atomicity: if one of the futexes can't be queued, we would rollback
(u
safer
to do it right instead of piling on more and more workarounds for
special situations.
It simple as is, there is no need to overdesign.
--
Davi Arnaut
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [EMAIL PROTECTED]
More majordo
Ulrich Drepper wrote:
> On 5/1/07, Davi Arnaut <[EMAIL PROTECTED]> wrote:
>> The pollable futex approach is far superior (send and receive events from
>> userspace or kernel) to eventfd and fixes (supercedes) FUTEX_FD at the same
>> time.
>> [...]
>
Ulrich Drepper wrote:
> On 5/1/07, Davi Arnaut <[EMAIL PROTECTED]> wrote:
>> The pollable futex approach is far superior (send and receive events from
>> userspace or kernel) to eventfd and fixes (supercedes) FUTEX_FD at the same
>> time.
>> [...]
>
Eric Dumazet wrote:
> Davi Arnaut a écrit :
>> Eric Dumazet wrote:
>>> Davi Arnaut a écrit :
>>>> Asynchronously wait for FUTEX_WAKE operation on a futex if it still
>>>> contains
>>>> a given value. There can be only one futex wait per
Eric Dumazet wrote:
> Davi Arnaut a écrit :
>> Eric Dumazet wrote:
>>> Davi Arnaut a écrit :
>>>> Asynchronously wait for FUTEX_WAKE operation on a futex if it still
>>>> contains
>>>> a given value. There can be only one futex wait per
Eric Dumazet wrote:
> Davi Arnaut a écrit :
>> Asynchronously wait for FUTEX_WAKE operation on a futex if it still contains
>> a given value. There can be only one futex wait per file descriptor. However,
>> it can be rearmed (possibly at a different address) anytime.
>
Eric Dumazet wrote:
Davi Arnaut a écrit :
Asynchronously wait for FUTEX_WAKE operation on a futex if it still contains
a given value. There can be only one futex wait per file descriptor. However,
it can be rearmed (possibly at a different address) anytime.
The pollable futex approach is far
Eric Dumazet wrote:
Davi Arnaut a écrit :
Eric Dumazet wrote:
Davi Arnaut a écrit :
Asynchronously wait for FUTEX_WAKE operation on a futex if it still
contains
a given value. There can be only one futex wait per file descriptor.
However,
it can be rearmed (possibly at a different
Eric Dumazet wrote:
Davi Arnaut a écrit :
Eric Dumazet wrote:
Davi Arnaut a écrit :
Asynchronously wait for FUTEX_WAKE operation on a futex if it still
contains
a given value. There can be only one futex wait per file descriptor.
However,
it can be rearmed (possibly at a different
Ulrich Drepper wrote:
On 5/1/07, Davi Arnaut [EMAIL PROTECTED] wrote:
The pollable futex approach is far superior (send and receive events from
userspace or kernel) to eventfd and fixes (supercedes) FUTEX_FD at the same
time.
[...]
You have to explain in detail how these interfaces
Ulrich Drepper wrote:
On 5/1/07, Davi Arnaut [EMAIL PROTECTED] wrote:
The pollable futex approach is far superior (send and receive events from
userspace or kernel) to eventfd and fixes (supercedes) FUTEX_FD at the same
time.
[...]
snip
- more complicated case: I have to wait
to do it right instead of piling on more and more workarounds for
special situations.
It simple as is, there is no need to overdesign.
--
Davi Arnaut
-
To unsubscribe from this list: send the line unsubscribe linux-kernel in
the body of a message to [EMAIL PROTECTED]
More majordomo info at http
Ulrich Drepper wrote:
On 5/2/07, Davi Arnaut [EMAIL PROTECTED] wrote:
It's quite easy to implement this scheme by write()ing the futexes all
at once but that would break the one futex per fd association. For
atomicity: if one of the futexes can't be queued, we would rollback
(unqueue
Ulrich Drepper wrote:
On 5/2/07, Davi Arnaut [EMAIL PROTECTED] wrote:
thread A:
int fd = plfutex(addr, 0);
do
poll(fdset+fd);
process network events
queue obj to thread B
if fd:
job processed
thread B:
wait_job();
process_job
).
--
Davi Arnaut
-
To unsubscribe from this list: send the line unsubscribe linux-kernel in
the body of a message to [EMAIL PROTECTED]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Ulrich Drepper wrote:
On 5/2/07, Davi Arnaut [EMAIL PROTECTED] wrote:
NO! Every single waiter of the _file descriptor_ is waked, not of the
futex.
And how is this better? In this world of yours a program must have
one file descriptor for each single futex which is used like this *per
thread
Davide Libenzi wrote:
On Wed, 2 May 2007, Davi Arnaut wrote:
Davide Libenzi wrote:
On Tue, 1 May 2007, Andrew Morton wrote:
David, could you provide some feedback please? The patches are stunningly
free of comments, but you used to do that to me pretty often so my
Davide Libenzi wrote:
On Wed, 2 May 2007, Davi Arnaut wrote:
So in this case I may borrow some signalfd code :-) I really like the
signalfd approach, but IMHO the code is quite ugly and duplicates
a lot of hairy code.
Ugly, really? Please ...
+ while (!mutex_trylock(evs-mutex
Thomas Gleixner wrote:
On Wed, 2007-05-02 at 02:22 -0300, Davi Arnaut wrote:
plain text document attachment (pollfs-timer.patch)
Per file descriptor high-resolution timers. A classic unix file interface for
the POSIX timer_(create|settime|gettime|delete) family of functions.
Signed-off
The key feature of the pollfs file operations is to internally handle
pollable (waitable) resources as files without exporting complex and
bug-prone underlying (VFS) implementation details.
All resource handlers are required to implement the read, write, poll,
release operations and must not
Export the new plsignal syscall prototype. While there, make it "conditional".
Signed-off-by: Davi E. M. Arnaut <[EMAIL PROTECTED]>
---
include/linux/syscalls.h |2 ++
kernel/sys_ni.c |1 +
2 files changed, 3 insertions(+)
Index: linux-2.6/include/linux/syscalls.h
Retrieve multiple per-process signals through a file descriptor. The mask
of signals can be changed at any time. Also, the compat code can be kept
very simple.
Signed-off-by: Davi E. M. Arnaut <[EMAIL PROTECTED]>
---
fs/pollfs/Makefile |2
fs/pollfs/signal.c | 144
Compat handlers for the pollable signal operations. Later the0 compat operations
can operate on a per call basis.
Signed-off-by: Davi E. M. Arnaut <[EMAIL PROTECTED]>
---
fs/pollfs/signal.c | 85 +
1 file changed, 85 insertions(+)
Index:
Make the plfutex syscall available to user-space on x86_64.
Signed-off-by: Davi E. M. Arnaut <[EMAIL PROTECTED]>
---
arch/x86_64/ia32/ia32entry.S |1 +
include/asm-x86_64/unistd.h |4 +++-
2 files changed, 4 insertions(+), 1 deletion(-)
Index: linux-2.6/arch/x86_64/ia32/ia32entry.S
Break apart and export the futex_wait function in order to be able to
associate (wait for) a futex with other resources.
Signed-off-by: Davi E. M. Arnaut <[EMAIL PROTECTED]>
---
include/linux/futex.h | 80 ++
kernel/futex.c| 130
Per file descriptor high-resolution timers. A classic unix file interface for
the POSIX timer_(create|settime|gettime|delete) family of functions.
Signed-off-by: Davi E. M. Arnaut <[EMAIL PROTECTED]>
---
fs/pollfs/Makefile |1
fs/pollfs/timer.c | 198
Make the plsignal syscall available to user-space on x86_64.
Signed-off-by: Davi E. M. Arnaut <[EMAIL PROTECTED]>
---
arch/x86_64/ia32/ia32entry.S |3 ++-
include/asm-x86_64/unistd.h |4 +++-
2 files changed, 5 insertions(+), 2 deletions(-)
Index: linux-2.6/include/asm-x86_64/unistd.h
Add a wait queue to the task_struct in order to be able to
associate (wait for) a signal with other resources.
Signed-off-by: Davi E. M. Arnaut <[EMAIL PROTECTED]>
---
include/linux/init_task.h |1 +
include/linux/sched.h |1 +
kernel/fork.c |1 +
kernel/signal.c
Make the plaio syscall available to user-space on x86.
Signed-off-by: Davi E. M. Arnaut <[EMAIL PROTECTED]>
---
arch/i386/kernel/syscall_table.S |1 +
include/asm-i386/unistd.h|3 ++-
2 files changed, 3 insertions(+), 1 deletion(-)
Index: linux-2.6/include/asm-i386/unistd.h
Submit, retrieve, or poll aio requests for completion through a
file descriptor. User supplies a aio_context_t that is used to
fetch a reference to the kioctx. Once the file descriptor is
closed, the reference is decremented.
Signed-off-by: Davi E. M. Arnaut <[EMAIL PROTECTED]>
---
Export the new pltimer syscall prototype. While there, make it "conditional".
Signed-off-by: Davi E. M. Arnaut <[EMAIL PROTECTED]>
---
include/linux/syscalls.h |2 ++
kernel/sys_ni.c |1 +
2 files changed, 3 insertions(+)
Index: linux-2.6/include/linux/syscalls.h
Make the plsignal syscall available to user-space on x86.
Signed-off-by: Davi E. M. Arnaut <[EMAIL PROTECTED]>
---
arch/i386/kernel/syscall_table.S |1 +
include/asm-i386/unistd.h|3 ++-
2 files changed, 3 insertions(+), 1 deletion(-)
Index: linux-2.6/include/asm-i386/unistd.h
Make the plfutex syscall available to user-space on x86.
Signed-off-by: Davi E. M. Arnaut <[EMAIL PROTECTED]>
---
arch/i386/kernel/syscall_table.S |1 +
include/asm-i386/unistd.h|3 ++-
2 files changed, 3 insertions(+), 1 deletion(-)
Index: linux-2.6/include/asm-i386/unistd.h
The aio_ring_empty() function returns true if the AIO event ring has no
elements, false otherwise.
Signed-off-by: Davi E. M. Arnaut <[EMAIL PROTECTED]>
---
fs/aio.c| 17 +
include/linux/aio.h |1 +
2 files changed, 18 insertions(+)
Index: linux-2.6/fs/aio.c
Make the pltimer syscall available to user-space on x86.
Signed-off-by: Davi E. M. Arnaut <[EMAIL PROTECTED]>
---
arch/i386/kernel/syscall_table.S |1 +
include/asm-i386/unistd.h|3 ++-
2 files changed, 3 insertions(+), 1 deletion(-)
Index: linux-2.6/include/asm-i386/unistd.h
Asynchronously wait for FUTEX_WAKE operation on a futex if it still contains
a given value. There can be only one futex wait per file descriptor. However,
it can be rearmed (possibly at a different address) anytime.
The pollable futex approach is far superior (send and receive events from
Export the new plfutex syscall prototype. While there, make it "conditional".
Signed-off-by: Davi E. M. Arnaut <[EMAIL PROTECTED]>
---
include/linux/syscalls.h |2 ++
kernel/sys_ni.c |1 +
2 files changed, 3 insertions(+)
Index: linux-2.6/include/linux/syscalls.h
Make the plaio syscall available to user-space on x86_64.
Signed-off-by: Davi E. M. Arnaut <[EMAIL PROTECTED]>
---
arch/x86_64/ia32/ia32entry.S |1 +
include/asm-x86_64/unistd.h |4 +++-
2 files changed, 4 insertions(+), 1 deletion(-)
Index: linux-2.6/arch/x86_64/ia32/ia32entry.S
Export the new plaio syscall prototype. While there, make it "conditional".
Signed-off-by: Davi E. M. Arnaut <[EMAIL PROTECTED]>
---
include/linux/syscalls.h |2 ++
kernel/sys_ni.c |1 +
2 files changed, 3 insertions(+)
Index: linux-2.6/include/linux/syscalls.h
Make the pltimer syscall available to user-space on x86_64.
Signed-off-by: Davi E. M. Arnaut <[EMAIL PROTECTED]>
---
arch/x86_64/ia32/ia32entry.S |1 +
include/asm-x86_64/unistd.h |4 +++-
2 files changed, 4 insertions(+), 1 deletion(-)
Index: linux-2.6/arch/x86_64/ia32/ia32entry.S
Add pollfs_fs.h header which contains the kernel-side declarations
and auxiliary macros for type safety checks. Those macros can be
simplified later.
Signed-off-by: Davi E. M. Arnaut <[EMAIL PROTECTED]>
---
include/linux/pollfs_fs.h | 57 ++
1 file
upling the core filesystem from the "subsystems" (mere push and
pop operations).
Currently implemented waitable "objects" are: signals, futexes, ai/o blocks and
timers.
More details at each patch.
http://haxent.com/~davi/pollfs/
Comments are welcome.
--
Davi Arnaut
-
To
Add pollfs_fs.h header which contains the kernel-side declarations
and auxiliary macros for type safety checks. Those macros can be
simplified later.
Signed-off-by: Davi E. M. Arnaut [EMAIL PROTECTED]
---
include/linux/pollfs_fs.h | 57 ++
1 file
the core filesystem from the subsystems (mere push and
pop operations).
Currently implemented waitable objects are: signals, futexes, ai/o blocks and
timers.
More details at each patch.
http://haxent.com/~davi/pollfs/
Comments are welcome.
--
Davi Arnaut
-
To unsubscribe from this list: send
Make the plaio syscall available to user-space on x86_64.
Signed-off-by: Davi E. M. Arnaut [EMAIL PROTECTED]
---
arch/x86_64/ia32/ia32entry.S |1 +
include/asm-x86_64/unistd.h |4 +++-
2 files changed, 4 insertions(+), 1 deletion(-)
Index: linux-2.6/arch/x86_64/ia32/ia32entry.S
Export the new plaio syscall prototype. While there, make it conditional.
Signed-off-by: Davi E. M. Arnaut [EMAIL PROTECTED]
---
include/linux/syscalls.h |2 ++
kernel/sys_ni.c |1 +
2 files changed, 3 insertions(+)
Index: linux-2.6/include/linux/syscalls.h
Make the pltimer syscall available to user-space on x86_64.
Signed-off-by: Davi E. M. Arnaut [EMAIL PROTECTED]
---
arch/x86_64/ia32/ia32entry.S |1 +
include/asm-x86_64/unistd.h |4 +++-
2 files changed, 4 insertions(+), 1 deletion(-)
Index: linux-2.6/arch/x86_64/ia32/ia32entry.S
Make the pltimer syscall available to user-space on x86.
Signed-off-by: Davi E. M. Arnaut [EMAIL PROTECTED]
---
arch/i386/kernel/syscall_table.S |1 +
include/asm-i386/unistd.h|3 ++-
2 files changed, 3 insertions(+), 1 deletion(-)
Index: linux-2.6/include/asm-i386/unistd.h
Asynchronously wait for FUTEX_WAKE operation on a futex if it still contains
a given value. There can be only one futex wait per file descriptor. However,
it can be rearmed (possibly at a different address) anytime.
The pollable futex approach is far superior (send and receive events from
Export the new plfutex syscall prototype. While there, make it conditional.
Signed-off-by: Davi E. M. Arnaut [EMAIL PROTECTED]
---
include/linux/syscalls.h |2 ++
kernel/sys_ni.c |1 +
2 files changed, 3 insertions(+)
Index: linux-2.6/include/linux/syscalls.h
Make the plfutex syscall available to user-space on x86.
Signed-off-by: Davi E. M. Arnaut [EMAIL PROTECTED]
---
arch/i386/kernel/syscall_table.S |1 +
include/asm-i386/unistd.h|3 ++-
2 files changed, 3 insertions(+), 1 deletion(-)
Index: linux-2.6/include/asm-i386/unistd.h
The aio_ring_empty() function returns true if the AIO event ring has no
elements, false otherwise.
Signed-off-by: Davi E. M. Arnaut [EMAIL PROTECTED]
---
fs/aio.c| 17 +
include/linux/aio.h |1 +
2 files changed, 18 insertions(+)
Index: linux-2.6/fs/aio.c
Export the new pltimer syscall prototype. While there, make it conditional.
Signed-off-by: Davi E. M. Arnaut [EMAIL PROTECTED]
---
include/linux/syscalls.h |2 ++
kernel/sys_ni.c |1 +
2 files changed, 3 insertions(+)
Index: linux-2.6/include/linux/syscalls.h
Make the plsignal syscall available to user-space on x86.
Signed-off-by: Davi E. M. Arnaut [EMAIL PROTECTED]
---
arch/i386/kernel/syscall_table.S |1 +
include/asm-i386/unistd.h|3 ++-
2 files changed, 3 insertions(+), 1 deletion(-)
Index: linux-2.6/include/asm-i386/unistd.h
Submit, retrieve, or poll aio requests for completion through a
file descriptor. User supplies a aio_context_t that is used to
fetch a reference to the kioctx. Once the file descriptor is
closed, the reference is decremented.
Signed-off-by: Davi E. M. Arnaut [EMAIL PROTECTED]
---
Add a wait queue to the task_struct in order to be able to
associate (wait for) a signal with other resources.
Signed-off-by: Davi E. M. Arnaut [EMAIL PROTECTED]
---
include/linux/init_task.h |1 +
include/linux/sched.h |1 +
kernel/fork.c |1 +
kernel/signal.c
Make the plaio syscall available to user-space on x86.
Signed-off-by: Davi E. M. Arnaut [EMAIL PROTECTED]
---
arch/i386/kernel/syscall_table.S |1 +
include/asm-i386/unistd.h|3 ++-
2 files changed, 3 insertions(+), 1 deletion(-)
Index: linux-2.6/include/asm-i386/unistd.h
Per file descriptor high-resolution timers. A classic unix file interface for
the POSIX timer_(create|settime|gettime|delete) family of functions.
Signed-off-by: Davi E. M. Arnaut [EMAIL PROTECTED]
---
fs/pollfs/Makefile |1
fs/pollfs/timer.c | 198
Make the plsignal syscall available to user-space on x86_64.
Signed-off-by: Davi E. M. Arnaut [EMAIL PROTECTED]
---
arch/x86_64/ia32/ia32entry.S |3 ++-
include/asm-x86_64/unistd.h |4 +++-
2 files changed, 5 insertions(+), 2 deletions(-)
Index: linux-2.6/include/asm-x86_64/unistd.h
Make the plfutex syscall available to user-space on x86_64.
Signed-off-by: Davi E. M. Arnaut [EMAIL PROTECTED]
---
arch/x86_64/ia32/ia32entry.S |1 +
include/asm-x86_64/unistd.h |4 +++-
2 files changed, 4 insertions(+), 1 deletion(-)
Index: linux-2.6/arch/x86_64/ia32/ia32entry.S
Break apart and export the futex_wait function in order to be able to
associate (wait for) a futex with other resources.
Signed-off-by: Davi E. M. Arnaut [EMAIL PROTECTED]
---
include/linux/futex.h | 80 ++
kernel/futex.c| 130
Export the new plsignal syscall prototype. While there, make it conditional.
Signed-off-by: Davi E. M. Arnaut [EMAIL PROTECTED]
---
include/linux/syscalls.h |2 ++
kernel/sys_ni.c |1 +
2 files changed, 3 insertions(+)
Index: linux-2.6/include/linux/syscalls.h
Retrieve multiple per-process signals through a file descriptor. The mask
of signals can be changed at any time. Also, the compat code can be kept
very simple.
Signed-off-by: Davi E. M. Arnaut [EMAIL PROTECTED]
---
fs/pollfs/Makefile |2
fs/pollfs/signal.c | 144
Compat handlers for the pollable signal operations. Later the0 compat operations
can operate on a per call basis.
Signed-off-by: Davi E. M. Arnaut [EMAIL PROTECTED]
---
fs/pollfs/signal.c | 85 +
1 file changed, 85 insertions(+)
Index:
The key feature of the pollfs file operations is to internally handle
pollable (waitable) resources as files without exporting complex and
bug-prone underlying (VFS) implementation details.
All resource handlers are required to implement the read, write, poll,
release operations and must not
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