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f1f9aea372
[ Upstream commit491f2927ae] s_fc_lock can be acquired from inode eviction and thus is reclaim unsafe. Since the fast commit path holds s_fc_lock while writing the commit log, allocations under the lock can enter reclaim and invert the lock order with fs_reclaim. Add ext4_fc_lock()/ext4_fc_unlock() helpers which acquire s_fc_lock under memalloc_nofs_save()/restore() context and use them everywhere so allocations under the lock cannot recurse into filesystem reclaim. Fixes:6593714d67("ext4: hold s_fc_lock while during fast commit") Signed-off-by: Li Chen <me@linux.beauty> Reviewed-by: Baokun Li <libaokun1@huawei.com> Reviewed-by: Zhang Yi <yi.zhang@huawei.com> Reviewed-by: Jan Kara <jack@suse.cz> Link: https://patch.msgid.link/20260106120621.440126-1-me@linux.beauty Signed-off-by: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Sasha Levin <sashal@kernel.org>
3948 lines
136 KiB
3948 lines
136 KiB