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Diffstat (limited to 'fs/f2fs/trace.c')
-rw-r--r--fs/f2fs/trace.c20
1 files changed, 13 insertions, 7 deletions
diff --git a/fs/f2fs/trace.c b/fs/f2fs/trace.c
index ce2a5eb210b6..d0ab533a9ce8 100644
--- a/fs/f2fs/trace.c
+++ b/fs/f2fs/trace.c
@@ -14,7 +14,7 @@
#include "trace.h"
static RADIX_TREE(pids, GFP_ATOMIC);
-static struct mutex pids_lock;
+static spinlock_t pids_lock;
static struct last_io_info last_io;
static inline void __print_last_io(void)
@@ -58,23 +58,29 @@ void f2fs_trace_pid(struct page *page)
set_page_private(page, (unsigned long)pid);
+retry:
if (radix_tree_preload(GFP_NOFS))
return;
- mutex_lock(&pids_lock);
+ spin_lock(&pids_lock);
p = radix_tree_lookup(&pids, pid);
if (p == current)
goto out;
if (p)
radix_tree_delete(&pids, pid);
- f2fs_radix_tree_insert(&pids, pid, current);
+ if (radix_tree_insert(&pids, pid, current)) {
+ spin_unlock(&pids_lock);
+ radix_tree_preload_end();
+ cond_resched();
+ goto retry;
+ }
trace_printk("%3x:%3x %4x %-16s\n",
MAJOR(inode->i_sb->s_dev), MINOR(inode->i_sb->s_dev),
pid, current->comm);
out:
- mutex_unlock(&pids_lock);
+ spin_unlock(&pids_lock);
radix_tree_preload_end();
}
@@ -119,7 +125,7 @@ void f2fs_trace_ios(struct f2fs_io_info *fio, int flush)
void f2fs_build_trace_ios(void)
{
- mutex_init(&pids_lock);
+ spin_lock_init(&pids_lock);
}
#define PIDVEC_SIZE 128
@@ -147,7 +153,7 @@ void f2fs_destroy_trace_ios(void)
pid_t next_pid = 0;
unsigned int found;
- mutex_lock(&pids_lock);
+ spin_lock(&pids_lock);
while ((found = gang_lookup_pids(pid, next_pid, PIDVEC_SIZE))) {
unsigned idx;
@@ -155,5 +161,5 @@ void f2fs_destroy_trace_ios(void)
for (idx = 0; idx < found; idx++)
radix_tree_delete(&pids, pid[idx]);
}
- mutex_unlock(&pids_lock);
+ spin_unlock(&pids_lock);
}