@@ -222,3 +222,29 @@ auto_units(
*units = "";
return number;
}
+
+/* How many threads to kick off? */
+unsigned int
+scrub_nproc(
+ struct scrub_ctx *ctx)
+{
+ if (nr_threads)
+ return nr_threads;
+ return ctx->nr_io_threads;
+}
+
+/*
+ * How many threads to kick off for a workqueue? If we only want one
+ * thread, save ourselves the overhead and just run it in the main thread.
+ */
+unsigned int
+scrub_nproc_workqueue(
+ struct scrub_ctx *ctx)
+{
+ unsigned int x;
+
+ x = scrub_nproc(ctx);
+ if (x == 1)
+ x = 0;
+ return x;
+}
@@ -59,5 +59,7 @@ debug_tweak_on(
double timeval_subtract(struct timeval *tv1, struct timeval *tv2);
double auto_space_units(unsigned long long kilobytes, char **units);
double auto_units(unsigned long long number, char **units);
+unsigned int scrub_nproc(struct scrub_ctx *ctx);
+unsigned int scrub_nproc_workqueue(struct scrub_ctx *ctx);
#endif /* XFS_SCRUB_COMMON_H_ */
@@ -57,6 +57,9 @@ struct scrub_ctx {
/* How does the user want us to react to errors? */
enum error_action error_action;
+ /* Number of threads for metadata scrubbing */
+ unsigned int nr_io_threads;
+
/* Mutable scrub state; use lock. */
pthread_mutex_t lock;
unsigned long long max_errors;