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NFS: Fix up writeback_control->nr_to_write accounting

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We're really accounting for the same page twice now: once in
generic_writepages(), and once in nfs_scan_dirty().

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Trond Myklebust 2006-12-05 00:36:56 -05:00
parent 3925675cb3
commit 9cf85e0a24
1 changed files with 1 additions and 9 deletions
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10
fs/nfs/pagelist.c
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@ -288,11 +288,10 @@ long nfs_scan_dirty(struct address_space *mapping,
struct nfs_page *pgvec[NFS_SCAN_MAXENTRIES]; struct nfs_page *pgvec[NFS_SCAN_MAXENTRIES];
struct nfs_page *req; struct nfs_page *req;
pgoff_t idx_start, idx_end; pgoff_t idx_start, idx_end;
long count = wbc->nr_to_write;
long res = 0; long res = 0;
int found, i; int found, i;
if (nfsi->ndirty == 0 || count <= 0) if (nfsi->ndirty == 0)
return 0; return 0;
if (wbc->range_cyclic) { if (wbc->range_cyclic) {
idx_start = 0; idx_start = 0;
@ -308,8 +307,6 @@ long nfs_scan_dirty(struct address_space *mapping,
for (;;) { for (;;) {
unsigned int toscan = NFS_SCAN_MAXENTRIES; unsigned int toscan = NFS_SCAN_MAXENTRIES;
if (toscan > count)
toscan = count;
found = radix_tree_gang_lookup_tag(&nfsi->nfs_page_tree, found = radix_tree_gang_lookup_tag(&nfsi->nfs_page_tree,
(void **)&pgvec[0], idx_start, toscan, (void **)&pgvec[0], idx_start, toscan,
NFS_PAGE_TAG_DIRTY); NFS_PAGE_TAG_DIRTY);
@ -334,16 +331,11 @@ long nfs_scan_dirty(struct address_space *mapping,
res++; res++;
if (res == LONG_MAX) if (res == LONG_MAX)
goto out; goto out;
count--;
if (count == 0)
goto out;
next: next:
idx_start = req->wb_index + 1; idx_start = req->wb_index + 1;
} }
} }
out: out:
wbc->nr_to_write = count;
WARN_ON ((nfsi->ndirty == 0) != list_empty(&nfsi->dirty)); WARN_ON ((nfsi->ndirty == 0) != list_empty(&nfsi->dirty));
return res; return res;
} }