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pnfs: recoalesce when ld read pagelist fails

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For pnfs pagelist read failure, we need to pg_recoalesce and resend IO to
mds.

Signed-off-by: Peng Tao <peng_tao@emc.com>
Signed-off-by: Jim Rees <rees@umich.edu>
Cc: stable@kernel.org [3.0]
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Peng Tao
2011-09-22 21:50:15 -04:00
committed by Trond Myklebust
parent 8ce160c5ef
commit 9b7eecdcfe
3 changed files with 19 additions and 15 deletions
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fs/nfs/read.c
+11 -1
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@@ -541,13 +541,23 @@ static void nfs_readpage_result_full(struct rpc_task *task, void *calldata)
static void nfs_readpage_release_full(void *calldata)
{
struct nfs_read_data *data = calldata;
struct nfs_pageio_descriptor pgio;
if (data->pnfs_error) {
nfs_pageio_init_read_mds(&pgio, data->inode);
pgio.pg_recoalesce = 1;
}
while (!list_empty(&data->pages)) {
struct nfs_page *req = nfs_list_entry(data->pages.next);
nfs_list_remove_request(req);
nfs_readpage_release(req);
if (!data->pnfs_error)
nfs_readpage_release(req);
else
nfs_pageio_add_request(&pgio, req);
}
if (data->pnfs_error)
nfs_pageio_complete(&pgio);
nfs_readdata_release(calldata);
}