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由 Paulo Alcantara (SUSE) 提交于
When creating or updating a cache entry, we need to get an DFS referral (get_dfs_referral), so avoid holding any locks during such network operation. To prevent that, do the following: * change cache hashtable sync method from RCU sync to a read/write lock. * use GFP_ATOMIC in memory allocations. Signed-off-by: NPaulo Alcantara (SUSE) <pc@cjr.nz> Signed-off-by: NSteve French <stfrench@microsoft.com>
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