Commit 9cf85e0a authored by Trond Myklebust's avatar Trond Myklebust

NFS: Fix up writeback_control->nr_to_write accounting

We're really accounting for the same page twice now: once in
generic_writepages(), and once in nfs_scan_dirty().
Signed-off-by: default avatarTrond Myklebust <Trond.Myklebust@netapp.com>
parent 3925675c
......@@ -288,11 +288,10 @@ long nfs_scan_dirty(struct address_space *mapping,
struct nfs_page *pgvec[NFS_SCAN_MAXENTRIES];
struct nfs_page *req;
pgoff_t idx_start, idx_end;
long count = wbc->nr_to_write;
long res = 0;
int found, i;
if (nfsi->ndirty == 0 || count <= 0)
if (nfsi->ndirty == 0)
return 0;
if (wbc->range_cyclic) {
idx_start = 0;
......@@ -308,8 +307,6 @@ long nfs_scan_dirty(struct address_space *mapping,
for (;;) {
unsigned int toscan = NFS_SCAN_MAXENTRIES;
if (toscan > count)
toscan = count;
found = radix_tree_gang_lookup_tag(&nfsi->nfs_page_tree,
(void **)&pgvec[0], idx_start, toscan,
NFS_PAGE_TAG_DIRTY);
......@@ -334,16 +331,11 @@ long nfs_scan_dirty(struct address_space *mapping,
res++;
if (res == LONG_MAX)
goto out;
count--;
if (count == 0)
goto out;
next:
idx_start = req->wb_index + 1;
}
}
out:
wbc->nr_to_write = count;
WARN_ON ((nfsi->ndirty == 0) != list_empty(&nfsi->dirty));
return res;
}
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment