btrfs: use dynamic allocation for root item in create_subvol

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The size of root item is more than 400 bytes, which is quite a lot of
stack space. As we do IO from inside the subvolume ioctls, we should
keep the stack usage low in case the filesystem is on top of other
layers (NFS, device mapper, iscsi, etc).

Reviewed-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>

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David Sterba 2016-03-24 17:49:22 +01:00

parent 153519559a

commit 49a3c4d9b6

1 changed files with 37 additions and 28 deletions

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fs/btrfs/ioctl.c

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