commit e5d32128b0f1373822b02b2a2e69c6b199e0f805
author Sundar Raman <sunds@ti.com> Thu Feb 09 10:31:10 2012 -0600
committer Ken Sumrall <ksumrall@android.com> Tue May 01 15:28:05 2012 -0700
tree 018dac4d3a8d9fb152b5b10a39f7f454666f1345
parent 94a55df34d917492cb3613b9445ffb1659459186

sdcard: use FUSE_BIG_WRITES for FUSE writes

Slightly optimizes the writes used by sdcard to increase
throughput and decrease cpu load. Update the read
size to 256 x 1024 + 128 from current 8192 bytes since
writes can go as high as that.

Change-Id: I3bad425f31d4aa6f44f546e3d31439fd5bdca9ea
Signed-off-by: Sundar Raman <sunds@ti.com>

sdcard/sdcard.c

diff --git a/sdcard/sdcard.c b/sdcard/sdcard.c
index dba5a4e..a95513c 100644
--- a/sdcard/sdcard.c
+++ b/sdcard/sdcard.c
@@ -912,7 +912,7 @@
         out.major = FUSE_KERNEL_VERSION;
         out.minor = FUSE_KERNEL_MINOR_VERSION;
         out.max_readahead = req->max_readahead;
-        out.flags = FUSE_ATOMIC_O_TRUNC;
+        out.flags = FUSE_ATOMIC_O_TRUNC | FUSE_BIG_WRITES;
         out.max_background = 32;
         out.congestion_threshold = 32;
         out.max_write = 256 * 1024;
@@ -941,7 +941,7 @@
     int len;
     
     for (;;) {
-        len = read(fuse->fd, req, 8192);
+        len = read(fuse->fd, req, sizeof(req));
         if (len < 0) {
             if (errno == EINTR)
                 continue;