diff options
Diffstat (limited to 'fs/xfs/xfs_sysfs.c')
| -rw-r--r-- | fs/xfs/xfs_sysfs.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/fs/xfs/xfs_sysfs.c b/fs/xfs/xfs_sysfs.c index 688366d42cd8..ddd0bf7a4740 100644 --- a/fs/xfs/xfs_sysfs.c +++ b/fs/xfs/xfs_sysfs.c @@ -204,11 +204,51 @@ always_cow_show( } XFS_SYSFS_ATTR_RW(always_cow); +#ifdef DEBUG +/* + * Override how many threads the parallel work queue is allowed to create. + * This has to be a debug-only global (instead of an errortag) because one of + * the main users of parallel workqueues is mount time quotacheck. + */ +STATIC ssize_t +pwork_threads_store( + struct kobject *kobject, + const char *buf, + size_t count) +{ + int ret; + int val; + + ret = kstrtoint(buf, 0, &val); + if (ret) + return ret; + + if (val < -1 || val > num_possible_cpus()) + return -EINVAL; + + xfs_globals.pwork_threads = val; + + return count; +} + +STATIC ssize_t +pwork_threads_show( + struct kobject *kobject, + char *buf) +{ + return snprintf(buf, PAGE_SIZE, "%d\n", xfs_globals.pwork_threads); +} +XFS_SYSFS_ATTR_RW(pwork_threads); +#endif /* DEBUG */ + static struct attribute *xfs_dbg_attrs[] = { ATTR_LIST(bug_on_assert), ATTR_LIST(log_recovery_delay), ATTR_LIST(mount_delay), ATTR_LIST(always_cow), +#ifdef DEBUG + ATTR_LIST(pwork_threads), +#endif NULL, }; |