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| /openbmc/linux/fs/nfsd/ |
| H A D | nfsctl.c | dc46bba7 Wed Aug 14 20:57:37 CDT 2019 J. Bruce Fields <bfields@redhat.com> nfsd: use i_wrlock instead of rcu for nfsdfs i_private
synchronize_rcu() gets called multiple times each time a client is
destroyed. If the laundromat thread has a lot of clients to destroy,
the delay can be noticeable. This was causing pynfs test RENEW3 to
fail.
We could embed an rcu_head in each inode and do the kref_put in an rcu
callback. But simplest is just to take a lock here.
(I also wonder if the laundromat thread would be better replaced by a
bunch of scheduled work or timers or something.)
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
dc46bba7 Wed Aug 14 20:57:37 CDT 2019 J. Bruce Fields <bfields@redhat.com> nfsd: use i_wrlock instead of rcu for nfsdfs i_private
synchronize_rcu() gets called multiple times each time a client is
destroyed. If the laundromat thread has a lot of clients to destroy,
the delay can be noticeable. This was causing pynfs test RENEW3 to
fail.
We could embed an rcu_head in each inode and do the kref_put in an rcu
callback. But simplest is just to take a lock here.
(I also wonder if the laundromat thread would be better replaced by a
bunch of scheduled work or timers or something.)
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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