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[PATCH] NFS: Make searching and waiting on busy writeback requests more efficient.

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Basically copies the VFS's method for tracking writebacks and applies
 it to the struct nfs_page.

 Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Trond Myklebust
2005-06-22 17:16:30 +00:00
parent ab0a3dbedc
commit c6a556b88a
4 changed files with 45 additions and 18 deletions
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19
fs/nfs/write.c
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@@ -503,13 +503,12 @@ nfs_wait_on_requests(struct inode *inode, unsigned long idx_start, unsigned int
spin_lock(&nfsi->req_lock);
next = idx_start;
while (radix_tree_gang_lookup(&nfsi->nfs_page_tree, (void **)&req, next, 1)) {
while (radix_tree_gang_lookup_tag(&nfsi->nfs_page_tree, (void **)&req, next, 1, NFS_PAGE_TAG_WRITEBACK)) {
if (req->wb_index > idx_end)
break;
next = req->wb_index + 1;
if (!NFS_WBACK_BUSY(req))
continue;
BUG_ON(!NFS_WBACK_BUSY(req));
atomic_inc(&req->wb_count);
spin_unlock(&nfsi->req_lock);
@@ -821,7 +820,7 @@ out:
#else
nfs_inode_remove_request(req);
#endif
nfs_unlock_request(req);
nfs_clear_page_writeback(req);
}
static inline int flush_task_priority(int how)
@@ -952,7 +951,7 @@ out_bad:
nfs_writedata_free(data);
}
nfs_mark_request_dirty(req);
nfs_unlock_request(req);
nfs_clear_page_writeback(req);
return -ENOMEM;
}
@@ -1002,7 +1001,7 @@ static int nfs_flush_one(struct list_head *head, struct inode *inode, int how)
struct nfs_page *req = nfs_list_entry(head->next);
nfs_list_remove_request(req);
nfs_mark_request_dirty(req);
nfs_unlock_request(req);
nfs_clear_page_writeback(req);
}
return -ENOMEM;
}
@@ -1029,7 +1028,7 @@ nfs_flush_list(struct list_head *head, int wpages, int how)
req = nfs_list_entry(head->next);
nfs_list_remove_request(req);
nfs_mark_request_dirty(req);
nfs_unlock_request(req);
nfs_clear_page_writeback(req);
}
return error;
}
@@ -1121,7 +1120,7 @@ static void nfs_writeback_done_full(struct nfs_write_data *data, int status)
nfs_inode_remove_request(req);
#endif
next:
nfs_unlock_request(req);
nfs_clear_page_writeback(req);
}
}
@@ -1278,7 +1277,7 @@ nfs_commit_list(struct list_head *head, int how)
req = nfs_list_entry(head->next);
nfs_list_remove_request(req);
nfs_mark_request_commit(req);
nfs_unlock_request(req);
nfs_clear_page_writeback(req);
}
return -ENOMEM;
}
@@ -1324,7 +1323,7 @@ nfs_commit_done(struct rpc_task *task)
dprintk(" mismatch\n");
nfs_mark_request_dirty(req);
next:
nfs_unlock_request(req);
nfs_clear_page_writeback(req);
res++;
}
sub_page_state(nr_unstable,res);