Hi Ryan,
First, whenever sending mail about the -rt patch, always CC Ingo (and
perhaps Thomas Gliexner and myself).
On Tue, 20 Jun 2006, Ryan McAvoy wrote:
> I have been trying to get the realtime-preempt patches working on a
> MIPs processor with the 2.6.15 (and subsequently the 2.6.16) kernel.
2.6.15 had lots of problems with -rt. Mainly the patch went through some
major rework, and Ingo was busy getting mutexes into mainline. So the
2.6.15-rtX was sort of neglected. It would be best to use 2.6.16-rtX and
maybe even 2.6.17-rtX
Which also comes the question: Which -rt patch are you actually trying?
>
> One problem I am having is as follows:
>
> - The mips configuration specifically disables
> CONFIG_RWSEM_GENERIC_SPINLOCK when CONFIG_PREEMPT_RT is on
That's a bug. It should enable it not disable it.
> - This causes the include/asm-mips/rwsem.h to be included by
> include/linux/rwsem.h.
> - include/asm-mips/rwsem.h calls rwsem_down_read_failed which is
> implemented in lib/rwsem.c
> - rwsem.c is only compiled if CONFIG_RWSEM_XCHGADD_ALGORITHM is on.
> This option is also disabled if CONFIG_PREEMPT_RT is on.
>
> To summarise, if CONFIG_PREEMPT_RT is on, then the mips specific
> rwsem.h is included, but at the same time, it prevents inclusion of
> lib/rwsem.c which is needed by the mips rwsem.h.
>
> Does anyone have a solution to this.
Yep, try the following patch: (completey untested since I don't have a
mips machine).
-- Steve
Signed-off-by: Steven Rostedt <[email protected]>
Index: linux-2.6.16-rt25/arch/mips/Kconfig
===================================================================
--- linux-2.6.16-rt25.orig/arch/mips/Kconfig 2006-06-21 04:02:54.000000000 -0400
+++ linux-2.6.16-rt25/arch/mips/Kconfig 2006-06-21 04:03:29.000000000 -0400
@@ -798,7 +798,7 @@ source "kernel/Kconfig.preempt"
config RWSEM_GENERIC_SPINLOCK
bool
- depends on !PREEMPT_RT
+ depends on PREEMPT_RT
default y
config RWSEM_XCHGADD_ALGORITHM
-
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/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
