[f2fs-dev] [Bug 216050] f2fs_gc occupies 100% cpu

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=216050

--- Comment #29 from Chao Yu (chao@kernel.org) ---
From 8a351359b0834f048dc35b5f53276c14a35e4ff9 Mon Sep 17 00:00:00 2001
From: Chao Yu <chao@kernel.org>
Date: Fri, 1 Jul 2022 08:58:50 +0800
Subject: [PATCH] f2fs: add debug log for gc_thread deadloop

---
 fs/f2fs/data.c | 3 +++
 fs/f2fs/gc.c   | 4 ++++
 2 files changed, 7 insertions(+)

diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index c448c3ee7ac3..6cb4ebbbae8b 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -1303,7 +1303,10 @@ struct page *f2fs_get_lock_data_page(struct inode
*inode, pgoff_t index,
 {
        struct address_space *mapping = inode->i_mapping;
        struct page *page;
+       int i = 0;
 repeat:
+       if (++i % 1000 == 0)
+               printf("f2fs_get_lock_data_page i:%d\n", i);
        page = f2fs_get_read_data_page(inode, index, 0, for_write);
        if (IS_ERR(page))
                return page;
diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
index f4aa3c88118b..d252de051810 100644
--- a/fs/f2fs/gc.c
+++ b/fs/f2fs/gc.c
@@ -1470,6 +1470,7 @@ static int gc_data_segment(struct f2fs_sb_info *sbi,
struct f2fs_summary *sum,
        int phase = 0;
        int submitted = 0;
        unsigned int usable_blks_in_seg = f2fs_usable_blks_in_seg(sbi, segno);
+       int i = 0;

        start_addr = START_BLOCK(sbi, segno);

@@ -1555,6 +1556,9 @@ static int gc_data_segment(struct f2fs_sb_info *sbi,
struct f2fs_summary *sum,
                                continue;
                        }

+                       if (++i % 1000 == 0)
+                               printf("gc_data_segment i:%d\n", i);
+
                        data_page = f2fs_get_read_data_page(inode,
                                                start_bidx, REQ_RAHEAD, true);
                        f2fs_up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
-- 
2.25.1

-- 
You may reply to this email to add a comment.

You are receiving this mail because:
You are watching the assignee of the bug.

_______________________________________________
Linux-f2fs-devel mailing list
Linux-f2fs-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel