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We must use GFP_NOFS instead GFP_KERNEL inside ext4_mb_add_groupinfo
and ext4_calculate_overhead() because they are called from inside a
journal transaction. Call trace:
ioctl
->ext4_group_add
->journal_start
->ext4_setup_new_descs
->ext4_mb_add_groupinfo -> GFP_KERNEL
->ext4_flex_group_add
->ext4_update_super
->ext4_calculate_overhead -> GFP_KERNEL
->journal_stop
Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>