Re: [take35 0/10] kevent: Generic event handling mechanism.
On Mon, Feb 12, 2007 at 09:13:35AM -0800, Andrew Morton ([EMAIL PROTECTED]) wrote: > > On Mon, 12 Feb 2007 13:35:10 +0300 Evgeniy Polyakov <[EMAIL PROTECTED]> > > wrote: > > Andrew, do you consider kevent for inclusion or declining? > > I haven't had time to think about it in the past month or two, sorry. > > However we might as well get it back in there for review-and-test - please > send a new patchset once 2.6.21-rc1 is released and copy me on it? Ok, I will. You are always in copy for kevent patchsets. -- Evgeniy Polyakov - 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/
Re: [take35 0/10] kevent: Generic event handling mechanism.
On Mon, Feb 12, 2007 at 06:59:17AM -0800, Ulrich Drepper ([EMAIL PROTECTED]) wrote: > Evgeniy Polyakov wrote: > > I think that mean that everybody is happy with APi, design and set of > > features. > > No comment means that I still have not been able to test anything since > regardless of what version I tried, it failed to build. I think if you would provide error message you saw, I fixed that in a couple of moments, doesn't it? I will send new patchset next week when rc1 will be out and your feedback is greatly appreciated. > -- > ➧ Ulrich Drepper ➧ Red Hat, Inc. ➧ 444 Castro St ➧ Mountain View, CA ❖ > -- Evgeniy Polyakov - 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/
Re: [take35 0/10] kevent: Generic event handling mechanism.
> On Mon, 12 Feb 2007 13:35:10 +0300 Evgeniy Polyakov <[EMAIL PROTECTED]> wrote: > Andrew, do you consider kevent for inclusion or declining? I haven't had time to think about it in the past month or two, sorry. However we might as well get it back in there for review-and-test - please send a new patchset once 2.6.21-rc1 is released and copy me on it? - 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/
Re: [take35 0/10] kevent: Generic event handling mechanism.
Evgeniy Polyakov wrote: > I think that mean that everybody is happy with APi, design and set of > features. No comment means that I still have not been able to test anything since regardless of what version I tried, it failed to build. -- ➧ Ulrich Drepper ➧ Red Hat, Inc. ➧ 444 Castro St ➧ Mountain View, CA ❖ signature.asc Description: OpenPGP digital signature
Re: [take35 0/10] kevent: Generic event handling mechanism.
On Mon, Feb 05, 2007 at 05:23:36PM +0300, Evgeniy Polyakov ([EMAIL PROTECTED]) wrote: > On Thu, Feb 01, 2007 at 01:12:30PM +0300, Evgeniy Polyakov ([EMAIL > PROTECTED]) wrote: > > > > Generic event handling mechanism. > > > > Kevent is a generic subsytem which allows to handle event notifications. > > It supports both level and edge triggered events. It is similar to > > poll/epoll in some cases, but it is more scalable, it is faster and > > allows to work with essentially eny kind of events. > > > > Events are provided into kernel through control syscall and can be read > > back through ring buffer or using usual syscalls. > > Kevent update (i.e. readiness switching) happens directly from internals > > of the appropriate state machine of the underlying subsytem (like > > network, filesystem, timer or any other). > > > > Homepage: > > http://tservice.net.ru/~s0mbre/old/?section=projects=kevent > > > > Documentation page: > > http://linux-net.osdl.org/index.php/Kevent > > > > Consider for inclusion. > > > > P.S. If you want to be removed from Cc: list just drop me a mail. > > > > Changes from 'take34' patchset: > > * Ported to the 2.6.20-rc7 (9be5b038b1c9d1927c367bf91683458e10d5d4eb) tree. > > Is there some progress? > Some things to be implemented, described or discussed? I think that mean that everybody is happy with APi, design and set of features. Andrew, do you consider kevent for inclusion or declining? -- Evgeniy Polyakov - 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/
Re: [take35 0/10] kevent: Generic event handling mechanism.
On Mon, Feb 05, 2007 at 05:23:36PM +0300, Evgeniy Polyakov ([EMAIL PROTECTED]) wrote: On Thu, Feb 01, 2007 at 01:12:30PM +0300, Evgeniy Polyakov ([EMAIL PROTECTED]) wrote: Generic event handling mechanism. Kevent is a generic subsytem which allows to handle event notifications. It supports both level and edge triggered events. It is similar to poll/epoll in some cases, but it is more scalable, it is faster and allows to work with essentially eny kind of events. Events are provided into kernel through control syscall and can be read back through ring buffer or using usual syscalls. Kevent update (i.e. readiness switching) happens directly from internals of the appropriate state machine of the underlying subsytem (like network, filesystem, timer or any other). Homepage: http://tservice.net.ru/~s0mbre/old/?section=projectsitem=kevent Documentation page: http://linux-net.osdl.org/index.php/Kevent Consider for inclusion. P.S. If you want to be removed from Cc: list just drop me a mail. Changes from 'take34' patchset: * Ported to the 2.6.20-rc7 (9be5b038b1c9d1927c367bf91683458e10d5d4eb) tree. Is there some progress? Some things to be implemented, described or discussed? I think that mean that everybody is happy with APi, design and set of features. Andrew, do you consider kevent for inclusion or declining? -- Evgeniy Polyakov - 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/
Re: [take35 0/10] kevent: Generic event handling mechanism.
Evgeniy Polyakov wrote: I think that mean that everybody is happy with APi, design and set of features. No comment means that I still have not been able to test anything since regardless of what version I tried, it failed to build. -- ➧ Ulrich Drepper ➧ Red Hat, Inc. ➧ 444 Castro St ➧ Mountain View, CA ❖ signature.asc Description: OpenPGP digital signature
Re: [take35 0/10] kevent: Generic event handling mechanism.
On Mon, 12 Feb 2007 13:35:10 +0300 Evgeniy Polyakov [EMAIL PROTECTED] wrote: Andrew, do you consider kevent for inclusion or declining? I haven't had time to think about it in the past month or two, sorry. However we might as well get it back in there for review-and-test - please send a new patchset once 2.6.21-rc1 is released and copy me on it? - 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/
Re: [take35 0/10] kevent: Generic event handling mechanism.
On Mon, Feb 12, 2007 at 06:59:17AM -0800, Ulrich Drepper ([EMAIL PROTECTED]) wrote: Evgeniy Polyakov wrote: I think that mean that everybody is happy with APi, design and set of features. No comment means that I still have not been able to test anything since regardless of what version I tried, it failed to build. I think if you would provide error message you saw, I fixed that in a couple of moments, doesn't it? I will send new patchset next week when rc1 will be out and your feedback is greatly appreciated. -- ➧ Ulrich Drepper ➧ Red Hat, Inc. ➧ 444 Castro St ➧ Mountain View, CA ❖ -- Evgeniy Polyakov - 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/
Re: [take35 0/10] kevent: Generic event handling mechanism.
On Mon, Feb 12, 2007 at 09:13:35AM -0800, Andrew Morton ([EMAIL PROTECTED]) wrote: On Mon, 12 Feb 2007 13:35:10 +0300 Evgeniy Polyakov [EMAIL PROTECTED] wrote: Andrew, do you consider kevent for inclusion or declining? I haven't had time to think about it in the past month or two, sorry. However we might as well get it back in there for review-and-test - please send a new patchset once 2.6.21-rc1 is released and copy me on it? Ok, I will. You are always in copy for kevent patchsets. -- Evgeniy Polyakov - 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/
Re: [take35 0/10] kevent: Generic event handling mechanism.
On Thu, 2007-02-01 at 13:12 +0300, Evgeniy Polyakov wrote: > Generic event handling mechanism. The patch applied cleanly to 2.6.20 final, but I got a build error: CC kernel/kevent/kevent.o CC kernel/kevent/kevent_user.o CC kernel/kevent/kevent_timer.o CC kernel/kevent/kevent_poll.o make[2]: *** No rule to make target `kernel/kevent/epoll.o', needed by `kernel/kevent/built-in.o'. Stop. make[1]: *** [kernel/kevent] Error 2 make: *** [kernel] Error 2 - DML - 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/
Re: [take35 0/10] kevent: Generic event handling mechanism.
On Mon, Feb 05, 2007 at 11:28:05AM -0600, David M. Lloyd ([EMAIL PROTECTED]) wrote: > On Thu, 2007-02-01 at 13:12 +0300, Evgeniy Polyakov wrote: > > Generic event handling mechanism. > > The patch applied cleanly to 2.6.20 final, but I got a build error: > > CC kernel/kevent/kevent.o > CC kernel/kevent/kevent_user.o > CC kernel/kevent/kevent_timer.o > CC kernel/kevent/kevent_poll.o > make[2]: *** No rule to make target `kernel/kevent/epoll.o', needed by > `kernel/kevent/built-in.o'. Stop. > make[1]: *** [kernel/kevent] Error 2 > make: *** [kernel] Error 2 It looks like I generated wrong diff from my tree - it compiles just fine. This patch should fix it. That hunk is about epoll rewrite over keent I posted couple of weeks ago. Thanks for testing. > - DML diff --git a/kernel/kevent/Makefile b/kernel/kevent/Makefile index a179bea..dc7f8b2 100644 --- a/kernel/kevent/Makefile +++ b/kernel/kevent/Makefile @@ -1,6 +1,6 @@ obj-y := kevent.o kevent_user.o obj-$(CONFIG_KEVENT_TIMER) += kevent_timer.o -obj-$(CONFIG_KEVENT_POLL) += kevent_poll.o epoll.o +obj-$(CONFIG_KEVENT_POLL) += kevent_poll.o obj-$(CONFIG_KEVENT_SOCKET) += kevent_socket.o obj-$(CONFIG_KEVENT_PIPE) += kevent_pipe.o obj-$(CONFIG_KEVENT_SIGNAL) += kevent_signal.o -- Evgeniy Polyakov - 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/
Re: [take35 0/10] kevent: Generic event handling mechanism.
On Thu, Feb 01, 2007 at 01:12:30PM +0300, Evgeniy Polyakov ([EMAIL PROTECTED]) wrote: > > Generic event handling mechanism. > > Kevent is a generic subsytem which allows to handle event notifications. > It supports both level and edge triggered events. It is similar to > poll/epoll in some cases, but it is more scalable, it is faster and > allows to work with essentially eny kind of events. > > Events are provided into kernel through control syscall and can be read > back through ring buffer or using usual syscalls. > Kevent update (i.e. readiness switching) happens directly from internals > of the appropriate state machine of the underlying subsytem (like > network, filesystem, timer or any other). > > Homepage: > http://tservice.net.ru/~s0mbre/old/?section=projects=kevent > > Documentation page: > http://linux-net.osdl.org/index.php/Kevent > > Consider for inclusion. > > P.S. If you want to be removed from Cc: list just drop me a mail. > > Changes from 'take34' patchset: > * Ported to the 2.6.20-rc7 (9be5b038b1c9d1927c367bf91683458e10d5d4eb) tree. Is there some progress? Some things to be implemented, described or discussed? Thank you. -- Evgeniy Polyakov - 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/
Re: [take35 0/10] kevent: Generic event handling mechanism.
On Thu, Feb 01, 2007 at 01:12:30PM +0300, Evgeniy Polyakov ([EMAIL PROTECTED]) wrote: Generic event handling mechanism. Kevent is a generic subsytem which allows to handle event notifications. It supports both level and edge triggered events. It is similar to poll/epoll in some cases, but it is more scalable, it is faster and allows to work with essentially eny kind of events. Events are provided into kernel through control syscall and can be read back through ring buffer or using usual syscalls. Kevent update (i.e. readiness switching) happens directly from internals of the appropriate state machine of the underlying subsytem (like network, filesystem, timer or any other). Homepage: http://tservice.net.ru/~s0mbre/old/?section=projectsitem=kevent Documentation page: http://linux-net.osdl.org/index.php/Kevent Consider for inclusion. P.S. If you want to be removed from Cc: list just drop me a mail. Changes from 'take34' patchset: * Ported to the 2.6.20-rc7 (9be5b038b1c9d1927c367bf91683458e10d5d4eb) tree. Is there some progress? Some things to be implemented, described or discussed? Thank you. -- Evgeniy Polyakov - 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/
Re: [take35 0/10] kevent: Generic event handling mechanism.
On Mon, Feb 05, 2007 at 11:28:05AM -0600, David M. Lloyd ([EMAIL PROTECTED]) wrote: On Thu, 2007-02-01 at 13:12 +0300, Evgeniy Polyakov wrote: Generic event handling mechanism. The patch applied cleanly to 2.6.20 final, but I got a build error: CC kernel/kevent/kevent.o CC kernel/kevent/kevent_user.o CC kernel/kevent/kevent_timer.o CC kernel/kevent/kevent_poll.o make[2]: *** No rule to make target `kernel/kevent/epoll.o', needed by `kernel/kevent/built-in.o'. Stop. make[1]: *** [kernel/kevent] Error 2 make: *** [kernel] Error 2 It looks like I generated wrong diff from my tree - it compiles just fine. This patch should fix it. That hunk is about epoll rewrite over keent I posted couple of weeks ago. Thanks for testing. - DML diff --git a/kernel/kevent/Makefile b/kernel/kevent/Makefile index a179bea..dc7f8b2 100644 --- a/kernel/kevent/Makefile +++ b/kernel/kevent/Makefile @@ -1,6 +1,6 @@ obj-y := kevent.o kevent_user.o obj-$(CONFIG_KEVENT_TIMER) += kevent_timer.o -obj-$(CONFIG_KEVENT_POLL) += kevent_poll.o epoll.o +obj-$(CONFIG_KEVENT_POLL) += kevent_poll.o obj-$(CONFIG_KEVENT_SOCKET) += kevent_socket.o obj-$(CONFIG_KEVENT_PIPE) += kevent_pipe.o obj-$(CONFIG_KEVENT_SIGNAL) += kevent_signal.o -- Evgeniy Polyakov - 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/
Re: [take35 0/10] kevent: Generic event handling mechanism.
On Thu, 2007-02-01 at 13:12 +0300, Evgeniy Polyakov wrote: Generic event handling mechanism. The patch applied cleanly to 2.6.20 final, but I got a build error: CC kernel/kevent/kevent.o CC kernel/kevent/kevent_user.o CC kernel/kevent/kevent_timer.o CC kernel/kevent/kevent_poll.o make[2]: *** No rule to make target `kernel/kevent/epoll.o', needed by `kernel/kevent/built-in.o'. Stop. make[1]: *** [kernel/kevent] Error 2 make: *** [kernel] Error 2 - DML - 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/
[take35 0/10] kevent: Generic event handling mechanism.
Generic event handling mechanism. Kevent is a generic subsytem which allows to handle event notifications. It supports both level and edge triggered events. It is similar to poll/epoll in some cases, but it is more scalable, it is faster and allows to work with essentially eny kind of events. Events are provided into kernel through control syscall and can be read back through ring buffer or using usual syscalls. Kevent update (i.e. readiness switching) happens directly from internals of the appropriate state machine of the underlying subsytem (like network, filesystem, timer or any other). Homepage: http://tservice.net.ru/~s0mbre/old/?section=projects=kevent Documentation page: http://linux-net.osdl.org/index.php/Kevent Consider for inclusion. P.S. If you want to be removed from Cc: list just drop me a mail. Changes from 'take34' patchset: * Ported to the 2.6.20-rc7 (9be5b038b1c9d1927c367bf91683458e10d5d4eb) tree. Changes from 'take33' patchset: * Added optional header pointer and its size into aio_sendfile_path(), which allows to send header and file in one syscall instead of send(header), open file, sendfile(file). Changes from 'take32' patchset: * Updated documentation (aio_sendfile_path()). * Fixed typo in forward declaration. Changes from 'take31' patchset: * Added aio_sendfile_path() - this syscall allows to asynchronosly transfer file specified by provided pathname to destination socket. Opened file descriptor is returned. * Added trivial scheduler which selects execution thread. It allows to specify given thread 'by-hands', but since kaio provides '-1' it uses round-robin to get processing thread. In theory it can be bound to scheduler statistics or gamma-ray receiver data. * Number of bug fixes in kevent based AIO mpage_readpages(). Benchmark of the 100 1Mb files transfer (files are in VFS already) using sync sendfile or this new version shows about 10Mb/sec performance win for aio_sendfile_path(). Changes from 'take30' patchset: * AIO state machine. * aio_sendfile() implementation. * moved kevent_user_get/kevent_user_put into header. * use *zalloc where needed. Changes from 'take29' patchset: * new private userspace notifications - allows to queue any userspace private event and then mark it as ready using kevent_ctl(KEVENT_READY) command * KEVENT_REQ_READY flag - if set kevent will be marked as ready at enqueue time * port to 2.6.20-rc2 tree (54abb5fcdae74a811ed440ec6556cabc6b24f404 commit) * use struct kmem_cache instead of kmem_cache_t * added notificaion type into search key, this allows to have the same id for different types of notifications Changes from 'take28' patchset: * optimized af_unix to use socket notifications * changed ALWAYS_QUEUE behaviour with poll/select notifications - previously kevent was not queued into poll wait queue when ALWAYS_QUEUE flag is set * added KEVENT_POLL_POLLRDHUP definition into ukevent.h header * libevent-1.2 patch (Jamal, your request is completed, so I'm waiting two weeks before starting final countdown :) All regression tests passed successfully except test_evbuffer(), which is crashed on my amd64 linux 2.6 test machine for all types of notifications, probably it was fixed in libevent-1.2a version, I did not check. Patch and README can be found at project homepage. Changes from 'take27' patchset: * made kevent default yes in non embedded case. * added falgs to callback structures - currently used to check if kevent can be requested from kernelspace only (posix timers) or userspace (all others) Changes from 'take26' patchset: * made kevent visible in config only in case of embedded setup. * added comment about KEVENT_MAX number. * spell fix. Changes from 'take25' patchset: * use timespec as timeout parameter. * added high-resolution timer to handle absolute timeouts. * added flags to waiting and initialization syscalls. * kevent_commit() has new_uidx parameter. * kevent_wait() has old_uidx parameter, which, if not equal to u->uidx, results in immediate wakeup (usefull for the case when entries are added asynchronously from kernel (not supported for now)). * added interface to mark any event as ready. * event POSIX timers support. * return -ENOSYS if there is no registered event type. * provided file descriptor must be checked for fifo type (spotted by Eric Dumazet). * signal notifications. * documentation update. * lighttpd patch updated (the latest benchmarks with lighttpd patch can be found in blog). Changes from 'take24' patchset: * new (old (new)) ring buffer implementation with kernel and user indexes. * added initialization syscall instead of opening /dev/kevent * kevent_commit() syscall to commit ring buffer entries * changed KEVENT_REQ_WAKEUP_ONE flag to KEVENT_REQ_WAKEUP_ALL, kevent wakes only first thread always if that flag is not set
[take35 0/10] kevent: Generic event handling mechanism.
Generic event handling mechanism. Kevent is a generic subsytem which allows to handle event notifications. It supports both level and edge triggered events. It is similar to poll/epoll in some cases, but it is more scalable, it is faster and allows to work with essentially eny kind of events. Events are provided into kernel through control syscall and can be read back through ring buffer or using usual syscalls. Kevent update (i.e. readiness switching) happens directly from internals of the appropriate state machine of the underlying subsytem (like network, filesystem, timer or any other). Homepage: http://tservice.net.ru/~s0mbre/old/?section=projectsitem=kevent Documentation page: http://linux-net.osdl.org/index.php/Kevent Consider for inclusion. P.S. If you want to be removed from Cc: list just drop me a mail. Changes from 'take34' patchset: * Ported to the 2.6.20-rc7 (9be5b038b1c9d1927c367bf91683458e10d5d4eb) tree. Changes from 'take33' patchset: * Added optional header pointer and its size into aio_sendfile_path(), which allows to send header and file in one syscall instead of send(header), open file, sendfile(file). Changes from 'take32' patchset: * Updated documentation (aio_sendfile_path()). * Fixed typo in forward declaration. Changes from 'take31' patchset: * Added aio_sendfile_path() - this syscall allows to asynchronosly transfer file specified by provided pathname to destination socket. Opened file descriptor is returned. * Added trivial scheduler which selects execution thread. It allows to specify given thread 'by-hands', but since kaio provides '-1' it uses round-robin to get processing thread. In theory it can be bound to scheduler statistics or gamma-ray receiver data. * Number of bug fixes in kevent based AIO mpage_readpages(). Benchmark of the 100 1Mb files transfer (files are in VFS already) using sync sendfile or this new version shows about 10Mb/sec performance win for aio_sendfile_path(). Changes from 'take30' patchset: * AIO state machine. * aio_sendfile() implementation. * moved kevent_user_get/kevent_user_put into header. * use *zalloc where needed. Changes from 'take29' patchset: * new private userspace notifications - allows to queue any userspace private event and then mark it as ready using kevent_ctl(KEVENT_READY) command * KEVENT_REQ_READY flag - if set kevent will be marked as ready at enqueue time * port to 2.6.20-rc2 tree (54abb5fcdae74a811ed440ec6556cabc6b24f404 commit) * use struct kmem_cache instead of kmem_cache_t * added notificaion type into search key, this allows to have the same id for different types of notifications Changes from 'take28' patchset: * optimized af_unix to use socket notifications * changed ALWAYS_QUEUE behaviour with poll/select notifications - previously kevent was not queued into poll wait queue when ALWAYS_QUEUE flag is set * added KEVENT_POLL_POLLRDHUP definition into ukevent.h header * libevent-1.2 patch (Jamal, your request is completed, so I'm waiting two weeks before starting final countdown :) All regression tests passed successfully except test_evbuffer(), which is crashed on my amd64 linux 2.6 test machine for all types of notifications, probably it was fixed in libevent-1.2a version, I did not check. Patch and README can be found at project homepage. Changes from 'take27' patchset: * made kevent default yes in non embedded case. * added falgs to callback structures - currently used to check if kevent can be requested from kernelspace only (posix timers) or userspace (all others) Changes from 'take26' patchset: * made kevent visible in config only in case of embedded setup. * added comment about KEVENT_MAX number. * spell fix. Changes from 'take25' patchset: * use timespec as timeout parameter. * added high-resolution timer to handle absolute timeouts. * added flags to waiting and initialization syscalls. * kevent_commit() has new_uidx parameter. * kevent_wait() has old_uidx parameter, which, if not equal to u-uidx, results in immediate wakeup (usefull for the case when entries are added asynchronously from kernel (not supported for now)). * added interface to mark any event as ready. * event POSIX timers support. * return -ENOSYS if there is no registered event type. * provided file descriptor must be checked for fifo type (spotted by Eric Dumazet). * signal notifications. * documentation update. * lighttpd patch updated (the latest benchmarks with lighttpd patch can be found in blog). Changes from 'take24' patchset: * new (old (new)) ring buffer implementation with kernel and user indexes. * added initialization syscall instead of opening /dev/kevent * kevent_commit() syscall to commit ring buffer entries * changed KEVENT_REQ_WAKEUP_ONE flag to KEVENT_REQ_WAKEUP_ALL, kevent wakes only first thread always if that flag is not
