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f2fs: avoid infinite loop to flush node pages 

xfstests/generic/475 can give EIO all the time which give an infinite loop
to flush node page like below. Let's avoid it.

[16418.518551] Call Trace:
[16418.518553]  ? dm_submit_bio+0x48/0x400
[16418.518574]  ? submit_bio_checks+0x1ac/0x5a0
[16418.525207]  __submit_bio+0x1a9/0x230
[16418.525210]  ? kmem_cache_alloc+0x29e/0x3c0
[16418.525223]  submit_bio_noacct+0xa8/0x2b0
[16418.525226]  submit_bio+0x4d/0x130
[16418.525238]  __submit_bio+0x49/0x310 [f2fs]
[16418.525339]  ? bio_add_page+0x6a/0x90
[16418.525344]  f2fs_submit_page_bio+0x134/0x1f0 [f2fs]
[16418.525365]  read_node_page+0x125/0x1b0 [f2fs]
[16418.525388]  __get_node_page.part.0+0x58/0x3f0 [f2fs]
[16418.525409]  __get_node_page+0x2f/0x60 [f2fs]
[16418.525431]  f2fs_get_dnode_of_data+0x423/0x860 [f2fs]
[16418.525452]  ? asm_sysvec_apic_timer_interrupt+0x12/0x20
[16418.525458]  ? __mod_memcg_state.part.0+0x2a/0x30
[16418.525465]  ? __mod_memcg_lruvec_state+0x27/0x40
[16418.525467]  ? __xa_set_mark+0x57/0x70
[16418.525472]  f2fs_do_write_data_page+0x10e/0x7b0 [f2fs]
[16418.525493]  f2fs_write_single_data_page+0x555/0x830 [f2fs]
[16418.525514]  ? sysvec_apic_timer_interrupt+0x4e/0x90
[16418.525518]  ? asm_sysvec_apic_timer_interrupt+0x12/0x20
[16418.525523]  f2fs_write_cache_pages+0x303/0x880 [f2fs]
[16418.525545]  ? blk_flush_plug_list+0x47/0x100
[16418.525548]  f2fs_write_data_pages+0xfd/0x320 [f2fs]
[16418.525569]  do_writepages+0xd5/0x210
[16418.525648]  filemap_fdatawrite_wbc+0x7d/0xc0
[16418.525655]  filemap_fdatawrite+0x50/0x70
[16418.525658]  f2fs_sync_dirty_inodes+0xa4/0x230 [f2fs]
[16418.525679]  f2fs_write_checkpoint+0x16d/0x1720 [f2fs]
[16418.525699]  ? ttwu_do_wakeup+0x1c/0x160
[16418.525709]  ? ttwu_do_activate+0x6d/0xd0
[16418.525711]  ? __wait_for_common+0x11d/0x150
[16418.525715]  kill_f2fs_super+0xca/0x100 [f2fs]
[16418.525733]  deactivate_locked_super+0x3b/0xb0
[16418.525739]  deactivate_super+0x40/0x50
[16418.525741]  cleanup_mnt+0x139/0x190
[16418.525747]  __cleanup_mnt+0x12/0x20
[16418.525749]  task_work_run+0x6d/0xa0
[16418.525765]  exit_to_user_mode_prepare+0x1ad/0x1b0
[16418.525771]  syscall_exit_to_user_mode+0x27/0x50
[16418.525774]  do_syscall_64+0x48/0xc0
[16418.525776]  entry_SYSCALL_64_after_hwframe+0x44/0xae

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Jaegeuk Kim 2022-03-29 16:25:54 -07:00
parent c550e25bca
commit a7b8618aa2
3 changed files with 32 additions and 22 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
fs/f2fs/checkpoint.c
View File

@ -98,13 +98,7 @@ repeat:
}
if (unlikely(!PageUptodate(page))) {
if (page->index == sbi->metapage_eio_ofs) {
if (sbi->metapage_eio_cnt++ == MAX_RETRY_META_PAGE_EIO)
set_ckpt_flags(sbi, CP_ERROR_FLAG);
} else {
sbi->metapage_eio_ofs = page->index;
sbi->metapage_eio_cnt = 0;
}
f2fs_handle_page_eio(sbi, page->index, META);
f2fs_put_page(page, 1);
return ERR_PTR(-EIO);
}

23
fs/f2fs/f2fs.h
View File

@ -578,8 +578,8 @@ enum {
/* maximum retry quota flush count */
#define DEFAULT_RETRY_QUOTA_FLUSH_COUNT 8
/* maximum retry of EIO'ed meta page */
#define MAX_RETRY_META_PAGE_EIO 100
/* maximum retry of EIO'ed page */
#define MAX_RETRY_PAGE_EIO 100
#define F2FS_LINK_MAX 0xffffffff /* maximum link count per file */
@ -1614,8 +1614,8 @@ struct f2fs_sb_info {
/* keep migration IO order for LFS mode */
struct f2fs_rwsem io_order_lock;
mempool_t *write_io_dummy; /* Dummy pages */
pgoff_t metapage_eio_ofs; /* EIO page offset */
int metapage_eio_cnt; /* EIO count */
pgoff_t page_eio_ofs[NR_PAGE_TYPE]; /* EIO page offset */
int page_eio_cnt[NR_PAGE_TYPE]; /* EIO count */
/* for checkpoint */
struct f2fs_checkpoint *ckpt; /* raw checkpoint pointer */
@ -4534,6 +4534,21 @@ static inline void f2fs_io_schedule_timeout(long timeout)
io_schedule_timeout(timeout);
}
static inline void f2fs_handle_page_eio(struct f2fs_sb_info *sbi, pgoff_t ofs,
enum page_type type)
{
if (unlikely(f2fs_cp_error(sbi)))
return;
if (ofs == sbi->page_eio_ofs[type]) {
if (sbi->page_eio_cnt[type]++ == MAX_RETRY_PAGE_EIO)
set_ckpt_flags(sbi, CP_ERROR_FLAG);
} else {
sbi->page_eio_ofs[type] = ofs;
sbi->page_eio_cnt[type] = 0;
}
}
#define EFSBADCRC EBADMSG /* Bad CRC detected */
#define EFSCORRUPTED EUCLEAN /* Filesystem is corrupted */

23
fs/f2fs/node.c
View File

@ -1416,8 +1416,7 @@ repeat:
err = read_node_page(page, 0);
if (err < 0) {
f2fs_put_page(page, 1);
return ERR_PTR(err);
goto out_put_err;
} else if (err == LOCKED_PAGE) {
err = 0;
goto page_hit;
@ -1443,19 +1442,21 @@ repeat:
goto out_err;
}
page_hit:
if (unlikely(nid != nid_of_node(page))) {
f2fs_warn(sbi, "inconsistent node block, nid:%lu, node_footer[nid:%u,ino:%u,ofs:%u,cpver:%llu,blkaddr:%u]",
if (likely(nid == nid_of_node(page)))
return page;
f2fs_warn(sbi, "inconsistent node block, nid:%lu, node_footer[nid:%u,ino:%u,ofs:%u,cpver:%llu,blkaddr:%u]",
nid, nid_of_node(page), ino_of_node(page),
ofs_of_node(page), cpver_of_node(page),
next_blkaddr_of_node(page));
set_sbi_flag(sbi, SBI_NEED_FSCK);
err = -EINVAL;
set_sbi_flag(sbi, SBI_NEED_FSCK);
err = -EINVAL;
out_err:
ClearPageUptodate(page);
f2fs_put_page(page, 1);
return ERR_PTR(err);
}
return page;
ClearPageUptodate(page);
out_put_err:
f2fs_handle_page_eio(sbi, page->index, NODE);
f2fs_put_page(page, 1);
return ERR_PTR(err);
}
struct page *f2fs_get_node_page(struct f2fs_sb_info *sbi, pgoff_t nid)