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| author | Trond Myklebust <trond.myklebust@primarydata.com> | 2017-06-20 19:35:37 -0400 |
|---|---|---|
| committer | Anna Schumaker <Anna.Schumaker@Netapp.com> | 2017-07-13 15:58:05 -0400 |
| commit | 919e3bd9a87593520a2c5dfda27bd3e6599852ed (patch) | |
| tree | 94bbb463d528d3ecf32967d067a2781b776709bc /fs/nfs/pagelist.c | |
| parent | b5973a8c1ccf375c9ab9e2428e1185e3f799af06 (diff) | |
| download | blackbird-op-linux-919e3bd9a87593520a2c5dfda27bd3e6599852ed.tar.gz blackbird-op-linux-919e3bd9a87593520a2c5dfda27bd3e6599852ed.zip | |
NFS: Ensure we commit after writeback is complete
If the page cache is being flushed, then we want to ensure that we
do start a commit once the pages are done being flushed.
If we just wait until all I/O is done to that file, we can end up
livelocking until the balance_dirty_pages() mechanism puts its
foot down and forces I/O to stop.
So instead we do more or less the same thing that O_DIRECT does,
and set up a counter to tell us when the flush is done,
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Diffstat (limited to 'fs/nfs/pagelist.c')
| -rw-r--r-- | fs/nfs/pagelist.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/nfs/pagelist.c b/fs/nfs/pagelist.c index de107d866297..83d2918f1b13 100644 --- a/fs/nfs/pagelist.c +++ b/fs/nfs/pagelist.c @@ -50,6 +50,7 @@ void nfs_pgheader_init(struct nfs_pageio_descriptor *desc, hdr->cred = hdr->req->wb_context->cred; hdr->io_start = req_offset(hdr->req); hdr->good_bytes = mirror->pg_count; + hdr->io_completion = desc->pg_io_completion; hdr->dreq = desc->pg_dreq; hdr->release = release; hdr->completion_ops = desc->pg_completion_ops; @@ -709,6 +710,7 @@ void nfs_pageio_init(struct nfs_pageio_descriptor *desc, desc->pg_ioflags = io_flags; desc->pg_error = 0; desc->pg_lseg = NULL; + desc->pg_io_completion = NULL; desc->pg_dreq = NULL; desc->pg_bsize = bsize; @@ -1231,6 +1233,7 @@ int nfs_pageio_resend(struct nfs_pageio_descriptor *desc, { LIST_HEAD(failed); + desc->pg_io_completion = hdr->io_completion; desc->pg_dreq = hdr->dreq; while (!list_empty(&hdr->pages)) { struct nfs_page *req = nfs_list_entry(hdr->pages.next); |
