quota: Do more fine-grained locking in dquot_acquire()

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We need dqio_sem held just for reading when calling ->read_dqblk() in
dquot_acquire(). Also dqio_sem is not needed when setting DQ_READ_B and
DQ_ACTIVE_B as concurrent reads and dquot activations are serialized by
dq_lock. So acquire and release dqio_sem closer to the place where it is
needed. This reduces lock hold time and will make locking changes
easier.

Signed-off-by: Jan Kara <jack@suse.cz>

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Jan Kara 2017-06-08 15:00:20 +02:00

parent bc8230ee8e

commit 62676838cb

1 changed files with 6 additions and 3 deletions

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fs/quota/dquot.c

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