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[PATCH] NFS: Replace nfs_page insertion sort with a radix sort

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Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Trond Myklebust
2005-06-22 17:16:31 +00:00
parent c6a556b88a
commit 3da28eb1c6
5 changed files with 107 additions and 74 deletions
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71
fs/nfs/write.c
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@@ -352,7 +352,7 @@ int nfs_writepages(struct address_space *mapping, struct writeback_control *wbc)
if (err < 0)
goto out;
}
err = nfs_commit_inode(inode, 0, 0, wb_priority(wbc));
err = nfs_commit_inode(inode, wb_priority(wbc));
if (err > 0) {
wbc->nr_to_write -= err;
err = 0;
@@ -446,6 +446,8 @@ nfs_mark_request_dirty(struct nfs_page *req)
struct nfs_inode *nfsi = NFS_I(inode);
spin_lock(&nfsi->req_lock);
radix_tree_tag_set(&nfsi->nfs_page_tree,
req->wb_index, NFS_PAGE_TAG_DIRTY);
nfs_list_add_request(req, &nfsi->dirty);
nfsi->ndirty++;
spin_unlock(&nfsi->req_lock);
@@ -537,12 +539,15 @@ static int
nfs_scan_dirty(struct inode *inode, struct list_head *dst, unsigned long idx_start, unsigned int npages)
{
struct nfs_inode *nfsi = NFS_I(inode);
int res;
res = nfs_scan_list(&nfsi->dirty, dst, idx_start, npages);
nfsi->ndirty -= res;
sub_page_state(nr_dirty,res);
if ((nfsi->ndirty == 0) != list_empty(&nfsi->dirty))
printk(KERN_ERR "NFS: desynchronized value of nfs_i.ndirty.\n");
int res = 0;
if (nfsi->ndirty != 0) {
res = nfs_scan_lock_dirty(nfsi, dst, idx_start, npages);
nfsi->ndirty -= res;
sub_page_state(nr_dirty,res);
if ((nfsi->ndirty == 0) != list_empty(&nfsi->dirty))
printk(KERN_ERR "NFS: desynchronized value of nfs_i.ndirty.\n");
}
return res;
}
@@ -561,11 +566,14 @@ static int
nfs_scan_commit(struct inode *inode, struct list_head *dst, unsigned long idx_start, unsigned int npages)
{
struct nfs_inode *nfsi = NFS_I(inode);
int res;
res = nfs_scan_list(&nfsi->commit, dst, idx_start, npages);
nfsi->ncommit -= res;
if ((nfsi->ncommit == 0) != list_empty(&nfsi->commit))
printk(KERN_ERR "NFS: desynchronized value of nfs_i.ncommit.\n");
int res = 0;
if (nfsi->ncommit != 0) {
res = nfs_scan_list(&nfsi->commit, dst, idx_start, npages);
nfsi->ncommit -= res;
if ((nfsi->ncommit == 0) != list_empty(&nfsi->commit))
printk(KERN_ERR "NFS: desynchronized value of nfs_i.ncommit.\n");
}
return res;
}
#endif
@@ -1209,36 +1217,24 @@ static void nfs_commit_rpcsetup(struct list_head *head,
struct nfs_write_data *data, int how)
{
struct rpc_task *task = &data->task;
struct nfs_page *first, *last;
struct nfs_page *first;
struct inode *inode;
loff_t start, end, len;
/* Set up the RPC argument and reply structs
* NB: take care not to mess about with data->commit et al. */
list_splice_init(head, &data->pages);
first = nfs_list_entry(data->pages.next);
last = nfs_list_entry(data->pages.prev);
inode = first->wb_context->dentry->d_inode;
/*
* Determine the offset range of requests in the COMMIT call.
* We rely on the fact that data->pages is an ordered list...
*/
start = req_offset(first);
end = req_offset(last) + last->wb_bytes;
len = end - start;
/* If 'len' is not a 32-bit quantity, pass '0' in the COMMIT call */
if (end >= i_size_read(inode) || len < 0 || len > (~((u32)0) >> 1))
len = 0;
data->inode = inode;
data->cred = first->wb_context->cred;
data->args.fh = NFS_FH(data->inode);
data->args.offset = start;
data->args.count = len;
data->res.count = len;
/* Note: we always request a commit of the entire inode */
data->args.offset = 0;
data->args.count = 0;
data->res.count = 0;
data->res.fattr = &data->fattr;
data->res.verf = &data->verf;
@@ -1357,8 +1353,7 @@ static int nfs_flush_inode(struct inode *inode, unsigned long idx_start,
}
#if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4)
int nfs_commit_inode(struct inode *inode, unsigned long idx_start,
unsigned int npages, int how)
int nfs_commit_inode(struct inode *inode, int how)
{
struct nfs_inode *nfsi = NFS_I(inode);
LIST_HEAD(head);
@@ -1366,15 +1361,13 @@ int nfs_commit_inode(struct inode *inode, unsigned long idx_start,
error = 0;
spin_lock(&nfsi->req_lock);
res = nfs_scan_commit(inode, &head, idx_start, npages);
res = nfs_scan_commit(inode, &head, 0, 0);
spin_unlock(&nfsi->req_lock);
if (res) {
res += nfs_scan_commit(inode, &head, 0, 0);
spin_unlock(&nfsi->req_lock);
error = nfs_commit_list(&head, how);
} else
spin_unlock(&nfsi->req_lock);
if (error < 0)
return error;
if (error < 0)
return error;
}
return res;
}
#endif
@@ -1396,7 +1389,7 @@ int nfs_sync_inode(struct inode *inode, unsigned long idx_start,
error = nfs_flush_inode(inode, idx_start, npages, how);
#if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4)
if (error == 0)
error = nfs_commit_inode(inode, idx_start, npages, how);
error = nfs_commit_inode(inode, how);
#endif
} while (error > 0);
return error;