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| author | Yang Erkun <yangerkun@huawei.com> | 2024-12-25 14:59:06 +0800 |
|---|---|---|
| committer | Chuck Lever <chuck.lever@oracle.com> | 2025-01-06 09:37:41 -0500 |
| commit | c224edca7af028828e2ad866b61d731b5e72b46d (patch) | |
| tree | 5e3da1a35a8ef7246ba146f7a04f0ba68e73b8ab /tools/perf/scripts/python/exported-sql-viewer.py | |
| parent | 2f55dbe4e2072c9e99298c6f37473778a98c9107 (diff) | |
nfsd: no need get cache ref when protected by rcu
rcu_read_lock/rcu_read_unlock has already provide protection for the
pointer we will reference when we call e_show. Therefore, there is no
need to obtain a cache reference to help protect cache_head.
Additionally, the .put such as expkey_put/svc_export_put will invoke
dput, which can sleep and break rcu. Stop get cache reference to fix
them all.
Fixes: ae74136b4bb6 ("SUNRPC: Allow cache lookups to use RCU protection rather than the r/w spinlock")
Suggested-by: NeilBrown <neilb@suse.de>
Signed-off-by: Yang Erkun <yangerkun@huawei.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Diffstat (limited to 'tools/perf/scripts/python/exported-sql-viewer.py')
0 files changed, 0 insertions, 0 deletions