LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
* v2.6.20-rt1, yum/rpm
@ 2007-02-05  6:56 Ingo Molnar
  2007-02-05  9:18 ` Serge Belyshev
                   ` (11 more replies)
  0 siblings, 12 replies; 27+ messages in thread
From: Ingo Molnar @ 2007-02-05  6:56 UTC (permalink / raw)
  To: linux-kernel; +Cc: linux-rt-users

i have released the v2.6.20-rt1 kernel, which can be downloaded from the 
usual place:

  http://redhat.com/~mingo/realtime-preempt/

more info about the -rt patchset can be found in the RT wiki:

  http://rt.wiki.kernel.org

This is a fixes-only release. Since the -rt tree has been closely 
tracking Linus' upstream kernel since -rc1, no new issues are expected - 
please re-report if anything is still unfixed.

There are lots of changes relative to 2.6.19-rt6 (the last stable 
release), but these are mostly fixes and other gradual improvements. KVM
is now enabled in the yum kernel on both i686 and x86_64 (and has been
enabled since around -rc1-rt1), the -rt tree tracks kvm-trunk (which is
a bit fresher than upstream KVM) and has a few additional paravirt
speedups implemented and enabled.

to build a 2.6.20-rt1 tree, the following patches should be applied:

  http://kernel.org/pub/linux/kernel/v2.6/linux-2.6.20.tar.bz2
  http://redhat.com/~mingo/realtime-preempt/patch-2.6.20-rt1

the -rt YUM repository for Fedora Core 6 and 5, for architectures i686 
and x86_64 can be activated via:

   cd /etc/yum.repos.d
   wget http://people.redhat.com/~mingo/realtime-preempt/rt.repo

   yum install kernel-rt.x86_64   # on x86_64
   yum install kernel-rt          # on i686

   yum update kernel-rt           # refresh - or enable yum-updatesd

as usual, bugreports, fixes and suggestions are welcome,

	Ingo

^ permalink raw reply	[flat|nested] 27+ messages in thread
* Re: v2.6.20-rt1, yum/rpm
@ 2007-02-05 15:06 Milan Svoboda
  0 siblings, 0 replies; 27+ messages in thread
From: Milan Svoboda @ 2007-02-05 15:06 UTC (permalink / raw)
  To: linux-kernel

On Feb 5, 7:50 am, Ingo Molnar <m...@elte.hu> wrote:
> i have released the v2.6.20-rt1 kernel, which can be downloaded from the
> usual place:
> 

Clean boot for me on ARM ixp4xx (gcc-4.1.1, glibc-2.5, big endian, 
softfloat).
High-res timers looks good.

However, I'm trying to use PI mutexes in userspace 
(pthread_mutexattr_setprotocol =>
PTHREAD_PRIO_INHERIT) and found strange behaviour. It seems to me that 
mutex
is not really locked, ie. first thread locks mutex then second thread also 
locks the
same mutex! Then the second mutex unlock it and when the first thread 
unlocks the
mutex error EPERM is returned.

What do you think, is it kernel or glibc problem? (Priority ceiling works 
as expected.)
Is PTHREAD_PRIO_INHERIT supposed to work on my platform?

If there is anything else what would you like to see from my system, let 
me know.

See logs from pi_tests-1.15 => classic_pi.c (I added code that test return 
value from
pthread_mutex_lock/pthread_mutex_unlock):

# /mnt/clfs/opt/classic_pi --verbose
main: Priority Inheritance turned on
set_cpu_affinity: using processr 0
main: creating low priority thread
main: creating medium priority thread
main: creating high priority thread
main: releasing all threads
high_priority: running as FIFO thread at priority 97
high_priority: entering ready state
med_priority: running as FIFO thread at priority 96
med_priority: entering ready state
low_priority: running as FIFO thread at priority 95
low_priority: entering ready state
main: all threads initialized, waiting for mutex to be claimed
main: waiting for threads to finish
high_priority: starting inversion loop (1)
high_priority: entering start state (1)
med_priority: starting inversion loop (1)
med_priority: entering start state (1)
low_priority: starting inversion loop (1)
low_priority: entering start wait (1)
high_priority: entering running state
med_priority: entering elevate state
low_priority: claiming mutex
low_priority: mutex locked
low_priority: entering locked wait
high_priority: locking mutex
high_priority: got mutex
high_priority: unlocking mutex
high_priority: entering finish state
low_priority: entering elevated wait
med_priority: entering finish state
low_priority: unlocking mutex
low_priority: mutex unlock failed: 1
low_priority: entering finish wait
high_priority: entering exit state
med_priority: entering exit state
low_priority: entering exit state
main: all threads terminated!
main: test passed

And this is log from kernel (I added prink to sys_futex and do_futex):
sys_futex: op == 0
do_futex: op == 0
sys_futex: op == 0
do_futex: op == 0
sys_futex: op == 0
do_futex: op == 0
sys_futex: op == 1
do_futex: op == 1
sys_futex: op == 0
do_futex: op == 0
sys_futex: op == 0
do_futex: op == 0
sys_futex: op == 0
do_futex: op == 0
sys_futex: op == 1
do_futex: op == 1
sys_futex: op == 0
do_futex: op == 0
sys_futex: op == 0
do_futex: op == 0
sys_futex: op == 1
do_futex: op == 1
sys_futex: op == 6
do_futex: op == 6
FUTEX_LOCK_PI
sys_futex: op == 7
do_futex: op == 7
FUTEX_UNLOCK_PI
sys_futex: op == 0
do_futex: op == 0
sys_futex: op == 1
do_futex: op == 1
sys_futex: op == 0
do_futex: op == 0
sys_futex: op == 1
do_futex: op == 1
sys_futex: op == 0
do_futex: op == 0
sys_futex: op == 0
do_futex: op == 0
sys_futex: op == 1
do_futex: op == 1
sys_futex: op == 1
do_futex: op == 1

^ permalink raw reply	[flat|nested] 27+ messages in thread

end of thread, other threads:[~2007-05-17 18:46 UTC | newest]

Thread overview: 27+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2007-02-05  6:56 v2.6.20-rt1, yum/rpm Ingo Molnar
2007-02-05  9:18 ` Serge Belyshev
2007-02-05  9:02   ` Ingo Molnar
2007-02-05 10:36 ` Sunil Naidu
2007-02-05 10:42   ` Peter Zijlstra
2007-02-05 10:22     ` Ingo Molnar
2007-02-05 11:15     ` Sunil Naidu
2007-02-05 12:59 ` Michal Piotrowski
2007-02-05 13:47   ` Ingo Molnar
2007-02-05 21:29     ` Michal Piotrowski
2007-02-05 14:25 ` Karsten Wiese
2007-02-05 15:17 ` Parag Warudkar
2007-02-05 21:50 ` Michal Piotrowski
2007-02-06  0:11 ` Michal Piotrowski
2007-02-06  1:14 ` Daniel Walker
2007-02-06 10:10 ` Arjan van de Ven
2007-02-07 12:32   ` Ingo Molnar
2007-02-06 10:30 ` Sunil Naidu
2007-02-27 17:39 ` K.R. Foley
2007-02-28  8:11   ` Ingo Molnar
2007-02-28 10:16     ` K.R. Foley
2007-04-26 13:57 ` v2.6.21-rt1 Ingo Molnar
2007-04-26 20:53   ` v2.6.21-rt1 Free Ekanayaka
2007-05-03 19:16   ` v2.6.21-rt1 - bug in asm-mips/atomic.h Tim Bird
2007-05-03 19:35     ` v2.6.21-rt1 - mips compile bugs Tim Bird
2007-05-17 18:46   ` v2.6.21-rt1 emin ak
2007-02-05 15:06 v2.6.20-rt1, yum/rpm Milan Svoboda

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).