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Commit 351f4fba authored by Jaegeuk Kim's avatar Jaegeuk Kim
Browse files

f2fs: add f2fs_destroy_trace_ios to free radix tree 



This patch removes radix tree after finishing tracing IOs.

Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent c0508650

fs/f2fs/super.c

+1 −0
Original line number Original line Diff line number Diff line
@@ -1272,6 +1272,7 @@ static void __exit exit_f2fs_fs(void) 
	destroy_node_manager_caches();

	destroy_node_manager_caches();

	destroy_inodecache();

	destroy_inodecache();

	kset_unregister(f2fs_kset);

	kset_unregister(f2fs_kset);

	f2fs_destroy_trace_ios();

}

}





module_init(init_f2fs_fs)

module_init(init_f2fs_fs)

fs/f2fs/trace.c

+37 −0
Original line number Original line Diff line number Diff line
@@ -11,6 +11,7 @@ 
#include <linux/fs.h>

#include <linux/fs.h>

#include <linux/f2fs_fs.h>

#include <linux/f2fs_fs.h>

#include <linux/sched.h>

#include <linux/sched.h>

#include <linux/radix-tree.h>





#include "f2fs.h"

#include "f2fs.h"

#include "trace.h"

#include "trace.h"
@@ -120,3 +121,39 @@ void f2fs_build_trace_ios(void) 
{

{

	spin_lock_init(&pids_lock);

	spin_lock_init(&pids_lock);

}

}



#define PIDVEC_SIZE	128

static unsigned int gang_lookup_pids(pid_t *results, unsigned long first_index,

							unsigned int max_items)

{

	struct radix_tree_iter iter;

	void **slot;

	unsigned int ret = 0;



	if (unlikely(!max_items))

		return 0;



	radix_tree_for_each_slot(slot, &pids, &iter, first_index) {

		results[ret] = iter.index;

		if (++ret == PIDVEC_SIZE)

			break;

	}

	return ret;

}



void f2fs_destroy_trace_ios(void)

{

	pid_t pid[PIDVEC_SIZE];

	pid_t next_pid = 0;

	unsigned int found;



	spin_lock(&pids_lock);

	while ((found = gang_lookup_pids(pid, next_pid, PIDVEC_SIZE))) {

		unsigned idx;



		next_pid = pid[found - 1] + 1;

		for (idx = 0; idx < found; idx++)

			radix_tree_delete(&pids, pid[idx]);

	}

	spin_unlock(&pids_lock);

}

fs/f2fs/trace.h

+2 −0
Original line number Original line Diff line number Diff line
@@ -35,10 +35,12 @@ struct last_io_info { 
extern void f2fs_trace_pid(struct page *);

extern void f2fs_trace_pid(struct page *);

extern void f2fs_trace_ios(struct page *, struct f2fs_io_info *, int);

extern void f2fs_trace_ios(struct page *, struct f2fs_io_info *, int);

extern void f2fs_build_trace_ios(void);

extern void f2fs_build_trace_ios(void);

extern void f2fs_destroy_trace_ios(void);

#else

#else

#define f2fs_trace_pid(p)

#define f2fs_trace_pid(p)

#define f2fs_trace_ios(p, i, n)

#define f2fs_trace_ios(p, i, n)

#define f2fs_build_trace_ios()

#define f2fs_build_trace_ios()

#define f2fs_destroy_trace_ios()





#endif

#endif

#endif /* __F2FS_TRACE_H__ */
 
#endif /* __F2FS_TRACE_H__ */