diff options
| author | behlendo <behlendo@7e1ea52c-4ff2-0310-8f11-9dd32ca42a1c> | 2008-11-03 20:07:20 +0000 |
|---|---|---|
| committer | behlendo <behlendo@7e1ea52c-4ff2-0310-8f11-9dd32ca42a1c> | 2008-11-03 20:07:20 +0000 |
| commit | f6c81c5ea7ba171bdb9e6d3a29c9e2a7fa6896ad (patch) | |
| tree | 4e4d7df1467f05d66f63d8302736aff4d3966344 /include | |
| parent | d50bd9e22179ec4c687bcb0d296a90c8039eeaae (diff) | |
Reviewed and applied spl-01-rm-gpl-symbol-set_cpus_allowed.patch
from Ricardo which removes a dependency on the GPL-only symbol
set_cpus_allowed(). Using this symbol is simpler but in the name
of portability we are adopting a spinlock based solution here
to remove this dependency.
git-svn-id: https://outreach.scidac.gov/svn/spl/trunk@160 7e1ea52c-4ff2-0310-8f11-9dd32ca42a1c
Diffstat (limited to 'include')
| -rw-r--r-- | include/sys/debug.h | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/include/sys/debug.h b/include/sys/debug.h index 41ce043fe..1c25083f3 100644 --- a/include/sys/debug.h +++ b/include/sys/debug.h @@ -157,6 +157,15 @@ union trace_data_union { unsigned short tcd_type; /* The factors to share debug memory. */ unsigned short tcd_pages_factor; + + /* + * This spinlock is needed to workaround the problem of + * set_cpus_allowed() being GPL-only. Since we cannot + * schedule a thread on a specific CPU when dumping the + * pages, we must use the spinlock for mutual exclusion. + */ + spinlock_t tcd_lock; + unsigned long tcd_lock_flags; } tcd; char __pad[L1_CACHE_ALIGN(sizeof(struct trace_cpu_data))]; }; @@ -168,9 +177,9 @@ extern union trace_data_union (*trace_data[TCD_TYPE_MAX])[NR_CPUS]; for (j = 0, ((tcd) = &(*trace_data[i])[j].tcd); \ j < num_possible_cpus(); j++, (tcd) = &(*trace_data[i])[j].tcd) -#define tcd_for_each_type_lock(tcd, i) \ +#define tcd_for_each_type_lock(tcd, i, cpu) \ for (i = 0; trace_data[i] && \ - (tcd = &(*trace_data[i])[smp_processor_id()].tcd) && \ + (tcd = &(*trace_data[i])[cpu].tcd) && \ trace_lock_tcd(tcd); trace_unlock_tcd(tcd), i++) struct trace_page { |