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Jeremy Kerr 4ef110141b [POWERPC] spufs: fix scheduler starvation by idle contexts ... 2.6.25 has a regression where we can starve the scheduler by creating (N_SPES+1) contexts, then running them one at a time. The final context will never be run, as the other contexts are loaded on the SPEs, none of which are repoted as free (ie, spu->alloc_state != SPU_FREE), so spu_get_idle() doesn't give us a spu to run on. Because all of the contexts are stopped, none are descheduled by the scheduler tick, as spusched_tick returns if spu_stopped(ctx). This change replaces the spu_stopped() check with checking for SCHED_IDLE in ctx->policy. We set a context's policy to SCHED_IDLE when we're not in spu_run(). We also favour SCHED_IDLE contexts when looking for contexts to unbind, but leave their timeslice intact for later resumption. This patch fixes the following test in the spufs-testsuite: tests/20-scheduler/02-yield-starvation Signed-off-by: Jeremy Kerr <jk@ozlabs.org>		17 years ago
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alpha	Introduce path_put()	17 years ago
arm	…
avr32	…
blackfin	d_path: Make d_path() use a struct path	17 years ago
cris	cris: import memset.c from newlib: fixes compile error with newer (pre4.3) gcc	17 years ago
frv	xtime_lock vs update_process_times	17 years ago
h8300	…
ia64	[IA64] Fix build for sim_defconfig	17 years ago
m32r	…
m68k	…
m68knommu	m68knommu: fix profile timer	17 years ago
mips	Introduce path_put()	17 years ago
mn10300	…
parisc	Introduce path_put()	17 years ago
powerpc	[POWERPC] spufs: fix scheduler starvation by idle contexts	17 years ago
ppc	…
s390	…
sh	sh: Fix multiple UTLB hit on UP SH-4.	17 years ago
sparc	xtime_lock vs update_process_times	17 years ago
sparc64	Introduce path_put()	17 years ago
um	Embed a struct path into struct nameidata instead of nd->{dentry,mnt}	17 years ago
v850	…
x86	Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6	17 years ago
xtensa	…
.gitignore	…
Kconfig	…