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| author | Trond Myklebust <Trond.Myklebust@netapp.com> | 2011-07-12 13:42:01 -0400 |
|---|---|---|
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2011-07-12 13:42:01 -0400 |
| commit | 87ed5eb44ad9338b1617a0e78dea81d681325298 (patch) | |
| tree | 17570d0d4cab601d13efad77d5aaaa02a8433dab /fs/nfs/write.c | |
| parent | c47abcf8ff4d0c56d20ce541e80d3e1c975f54b5 (diff) | |
| download | blackbird-op-linux-87ed5eb44ad9338b1617a0e78dea81d681325298.tar.gz blackbird-op-linux-87ed5eb44ad9338b1617a0e78dea81d681325298.zip | |
NFS: Don't use DATA_SYNC writes
If we're writing back data, and the FLUSH_STABLE flag is set, then we
always want to use NFS_FILE_SYNC, since we're always in a situation where
we're doing page reclaim, and so we want to free up the page as quickly
as possible.
If we're in the FLUSH_COND_STABLE case, then we either want to use another
unstable write (if we have to do a commit anyway) or again, we want to
use NFS_FILE_SYNC because we know that we have no more pages to write
out.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs/write.c')
| -rw-r--r-- | fs/nfs/write.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/fs/nfs/write.c b/fs/nfs/write.c index 7f8732e31982..1af4d82c4959 100644 --- a/fs/nfs/write.c +++ b/fs/nfs/write.c @@ -872,10 +872,14 @@ static int nfs_write_rpcsetup(struct nfs_page *req, data->args.context = get_nfs_open_context(req->wb_context); data->args.lock_context = req->wb_lock_context; data->args.stable = NFS_UNSTABLE; - if (how & (FLUSH_STABLE | FLUSH_COND_STABLE)) { - data->args.stable = NFS_DATA_SYNC; - if (!nfs_need_commit(NFS_I(inode))) - data->args.stable = NFS_FILE_SYNC; + switch (how & (FLUSH_STABLE | FLUSH_COND_STABLE)) { + case 0: + break; + case FLUSH_COND_STABLE: + if (nfs_need_commit(NFS_I(inode))) + break; + default: + data->args.stable = NFS_FILE_SYNC; } data->res.fattr = &data->fattr; |
