The following patches are intended to smooth out the page writeback performance by ensuring that we commit the data earlier on the server. We assume that if something is starting writeback on the pages, then that process wants to commit the data as soon as possible, whether it is an application or just the background flush process. We also assume that for streaming type processes, we don't want to pause the I/O in order to commit, so we don't want to rely on a counter of in-flight I/O to the entire inode going to zero. We therefore set up a monitor that counts the number of in-flight writes for each call to nfs_writepages(). Once all the writes to that call to nfs_writepages has completed, we send the commit. Note that this mirrors the behaviour for O_DIRECT writes, where we similarly track the in-flight writes on a per-call basis. Trond Myklebust (3): NFS: Remove unused fields in the page I/O structures NFS: Ensure we commit after writeback is complete NFS: Fix commit policy for non-blocking calls to nfs_write_inode() fs/nfs/pagelist.c | 5 ++-- fs/nfs/write.c | 59 +++++++++++++++++++++++++++++++++++++++++++++++- include/linux/nfs_page.h | 2 +- include/linux/nfs_xdr.h | 3 ++- 4 files changed, 64 insertions(+), 5 deletions(-) -- 2.9.4 -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
