On 2022/2/16 6:00, Jaegeuk Kim wrote:
1. this thread is stuck in f2fs_evict_inode by #2:
[210757.653718] __schedule+0x2e3/0x740
[210757.654811] schedule+0x42/0xb0
[210757.655829] rwsem_down_read_slowpath+0x16c/0x4a0
Who has held sb->s_writers.rw_sem?
Thanks,
[210757.657161] __down_read+0x6b/0x80
[210757.658254] __percpu_down_read+0x54/0x80
[210757.659413] __sb_start_write+0x79/0x80
[210757.660546] f2fs_evict_inode+0x354/0x5c0 [f2fs]
[210757.661808] ? var_wake_function+0x30/0x30
[210757.663016] evict+0xd2/0x1b0
[210757.664007] dispose_list+0x39/0x50
[210757.665083] prune_icache_sb+0x5c/0x80
[210757.666226] super_cache_scan+0x132/0x1b0
[210757.667373] do_shrink_slab+0x150/0x2a0
[210757.668510] shrink_slab+0x20c/0x2a0
[210757.669574] drop_slab_node+0x33/0x60
[210757.670646] drop_slab+0x3e/0x70
[210757.671633] drop_caches_sysctl_handler+0x75/0x85
[210757.672904] proc_sys_call_handler+0x1a2/0x1c0
[210757.674104] proc_sys_write+0x14/0x20
[210757.675189] __vfs_write+0x1b/0x40
[210757.676208] vfs_write+0xb9/0x1a0
[210757.677219] ksys_write+0x67/0xe0
[210757.678251] __x64_sys_write+0x1a/0x20
2. another thread is waiting for #1:
[210757.754646] schedule+0x42/0xb0
[210757.755680] rwsem_down_write_slowpath+0x244/0x4d0
[210757.757016] ? _cond_resched+0x19/0x30
[210757.758140] down_write+0x41/0x50
[210757.759223] prealloc_shrinker+0x6a/0x120
[210757.760397] alloc_super+0x275/0x2d0
[210757.761500] sget_fc+0x74/0x220
[210757.762547] ? set_anon_super+0x20/0x20
[210757.763711] ? shmem_create+0x20/0x20
[210757.764842] vfs_get_super+0x3d/0x100
[210757.765925] get_tree_nodev+0x16/0x20
[210757.767046] shmem_get_tree+0x15/0x20
[210757.768165] vfs_get_tree+0x2a/0xc0
[210757.769248] ? ns_capable+0x10/0x20
[210757.770361] do_mount+0x7b6/0x9c0
[210757.771423] ksys_mount+0x82/0xd0
[210757.772469] __x64_sys_mount+0x25/0x30
[210757.773592] do_syscall_64+0x57/0x190
3. thaw_super is waiting for #2, resulting in xfstests/generic/068 being stuck.
[210757.695823] __schedule+0x2e3/0x740
[210757.696897] ? sched_clock+0x9/0x10
[210757.697959] schedule+0x42/0xb0
[210757.698963] rwsem_down_write_slowpath+0x244/0x4d0
[210757.700247] down_write+0x41/0x50
[210757.701259] thaw_super+0x17/0x30
[210757.702235] do_vfs_ioctl+0x56f/0x670
[210757.703247] ? do_user_addr_fault+0x216/0x450
[210757.704395] ? _copy_to_user+0x2c/0x30
[210757.705443] ksys_ioctl+0x67/0x90
[210757.706419] __x64_sys_ioctl+0x1a/0x20
[210757.707437] do_syscall_64+0x57/0x190
Signed-off-by: Jaegeuk Kim <[email protected]>
---
fs/f2fs/inode.c | 2 --
1 file changed, 2 deletions(-)
diff --git a/fs/f2fs/inode.c b/fs/f2fs/inode.c
index ab8e0c06c78c..882db4bd917b 100644
--- a/fs/f2fs/inode.c
+++ b/fs/f2fs/inode.c
@@ -778,7 +778,6 @@ void f2fs_evict_inode(struct inode *inode)
f2fs_remove_ino_entry(sbi, inode->i_ino, UPDATE_INO);
f2fs_remove_ino_entry(sbi, inode->i_ino, FLUSH_INO);
- sb_start_intwrite(inode->i_sb);
set_inode_flag(inode, FI_NO_ALLOC);
i_size_write(inode, 0);
retry:
@@ -809,7 +808,6 @@ void f2fs_evict_inode(struct inode *inode)
if (dquot_initialize_needed(inode))
set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
}
- sb_end_intwrite(inode->i_sb);
no_delete:
dquot_drop(inode);
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