xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

nfs: per-name sillyunlink exclusion

Browse Source 
use d_alloc_parallel() for sillyunlink/lookup exclusion and
explicit rwsem (nfs_rmdir() being a writer and nfs_call_unlink() -
a reader) for rmdir/sillyunlink one.

That ought to make lookup/readdir/!O_CREAT atomic_open really
parallel on NFS.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
2016-04-28 23:56:31 -04:00
parent 9ac3d3e846
commit 884be17535
7 changed files with 71 additions and 174 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
fs/nfs/inode.c
View File

@@ -1958,9 +1958,7 @@ static void init_once(void *foo)
nfsi->nrequests = 0;
nfsi->commit_info.ncommit = 0;
atomic_set(&nfsi->commit_info.rpcs_out, 0);
atomic_set(&nfsi->silly_count, 1);
INIT_HLIST_HEAD(&nfsi->silly_list);
init_waitqueue_head(&nfsi->waitqueue);
init_rwsem(&nfsi->rmdir_sem);
nfs4_init_once(nfsi);
}