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authorTrond Myklebust <Trond.Myklebust@netapp.com>2012-03-15 22:16:40 +0100
committerTrond Myklebust <Trond.Myklebust@netapp.com>2012-03-17 16:09:33 +0100
commit8dd3775889345850ecddd689b5c200cdd91bd8c9 (patch)
treeea697cfcac3f3a927e90d0048e9ed76b5a3ea8e5 /drivers/devfreq
parentNFS: Fix a compile error when !defined NFS_DEBUG (diff)
downloadlinux-8dd3775889345850ecddd689b5c200cdd91bd8c9.tar.xz
linux-8dd3775889345850ecddd689b5c200cdd91bd8c9.zip
NFSv4.1: Clean ups and bugfixes for the pNFS read/writeback/commit code
Move more pnfs-isms out of the generic commit code. Bugfixes: - filelayout_scan_commit_lists doesn't need to get/put the lseg. In fact since it is run under the inode->i_lock, the lseg_put() can deadlock. - Ensure that we distinguish between what needs to be done for commit-to-data server and what needs to be done for commit-to-MDS using the new flag PG_COMMIT_TO_DS. Otherwise we may end up calling put_lseg() on a bucket for a struct nfs_page that got written through the MDS. - Fix a case where we were using list_del() on an nfs_page->wb_list instead of list_del_init(). - filelayout_initiate_commit needs to call filelayout_commit_release on error instead of the mds_ops->rpc_release(). Otherwise it won't clear the commit lock. Cleanups: - Let the files layout manage the commit lists for the pNFS case. Don't expose stuff like pnfs_choose_commit_list, and the fact that the commit buckets hold references to the layout segment in common code. - Cast out the put_lseg() calls for the struct nfs_read/write_data->lseg into the pNFS layer from whence they came. - Let the pNFS layer manage the NFS_INO_PNFS_COMMIT bit. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Cc: Fred Isaman <iisaman@netapp.com>
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