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TAKE - performance work for O_SYNC writes

To: linux-xfs@xxxxxxxxxxx
Subject: TAKE - performance work for O_SYNC writes
From: Steve Lord <lord@xxxxxxx>
Date: Mon, 2 Dec 2002 12:27:21 -0600
Sender: linux-xfs-bounce@xxxxxxxxxxx
for synchronous transactions, allow the in core log buffer to wait
around in active state for as long as possible. This allows us to
coalesce several transactions into one buffer and reduce the disk
traffic.


Date:  Mon Dec  2 10:26:49 PST 2002
Workarea:  jen.americas.sgi.com:/src/lord/xfs-linux.2.4

The following file(s) were checked into:
  bonnie.engr.sgi.com:/isms/slinx/2.4.x-xfs


Modid:  2.4.x-xfs:slinx:134077a
linux/fs/xfs/xfs_log.c - 1.262
        - Introduce a new sync variable in the iclog structure to sync
          between the last log write and the next one in the case of
          sync transactions forcing iclogs out to disk early.

linux/fs/xfs/xfs_log_priv.h - 1.85
        - new sync variable in the iclog structure



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