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| author | Andrew Morton <akpm@osdl.org> | 2005-11-16 15:07:01 -0800 |
|---|---|---|
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2006-01-06 14:58:38 -0500 |
| commit | 22905f775dd6a8b73be99826dcad07ceec00244b (patch) | |
| tree | 960c0ad3d10fa208a31b78256788f332e5ebdd48 /include/linux/writeback.h | |
| parent | d99cf9d679a520d67f81d805b7cb91c68e1847f0 (diff) | |
| download | lwn-22905f775dd6a8b73be99826dcad07ceec00244b.tar.gz lwn-22905f775dd6a8b73be99826dcad07ceec00244b.zip | |
identify multipage ->writepages() calls
NFS needs to be able to distinguish between single-page ->writepage() calls and
multipage ->writepages() calls.
For the single-page writepage calls NFS can kick off the I/O within the
context of ->writepage().
For multipage ->writepages calls, nfs_writepage() will leave the I/O pending
and nfs_writepages() will kick off the I/O when it all has been queued up
within NFS.
Cc: Trond Myklebust <trond.myklebust@fys.uio.no>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'include/linux/writeback.h')
| -rw-r--r-- | include/linux/writeback.h | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/include/linux/writeback.h b/include/linux/writeback.h index 64a36ba43b2f..b096159086e8 100644 --- a/include/linux/writeback.h +++ b/include/linux/writeback.h @@ -53,10 +53,11 @@ struct writeback_control { loff_t start; loff_t end; - unsigned nonblocking:1; /* Don't get stuck on request queues */ - unsigned encountered_congestion:1; /* An output: a queue is full */ - unsigned for_kupdate:1; /* A kupdate writeback */ - unsigned for_reclaim:1; /* Invoked from the page allocator */ + unsigned nonblocking:1; /* Don't get stuck on request queues */ + unsigned encountered_congestion:1; /* An output: a queue is full */ + unsigned for_kupdate:1; /* A kupdate writeback */ + unsigned for_reclaim:1; /* Invoked from the page allocator */ + unsigned for_writepages:1; /* This is a writepages() call */ }; /* |