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| author | Kevin Wolf <mail@kevin-wolf.de> | 2010-09-10 12:27:04 +0200 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2010-09-21 15:39:42 +0200 |
| commit | a655211ac6d379c5b0813761e5d11415780f41fd (patch) | |
| tree | c323273c59aa318f58495332cb471289f5c3b5c8 /block/vvfat.c | |
| parent | 9217e26f43df4aab7deaea35b21caacc1f1f854b (diff) | |
| download | qemu-a655211ac6d379c5b0813761e5d11415780f41fd.tar.gz | |
vvfat: Use cache=unsafe
The qcow file used for write support in vvfat is a temporary file,
so we can use cache=unsafe there. Without this, write support is just
too slow to be of any use.
Signed-off-by: Kevin Wolf <mail@kevin-wolf.de>
Diffstat (limited to 'block/vvfat.c')
| -rw-r--r-- | block/vvfat.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/block/vvfat.c b/block/vvfat.c index 07720371c9..53e57bf228 100644 --- a/block/vvfat.c +++ b/block/vvfat.c @@ -2788,6 +2788,7 @@ static int enable_write_target(BDRVVVFATState *s) { BlockDriver *bdrv_qcow; QEMUOptionParameter *options; + int ret; int size = sector2cluster(s, s->sector_count); s->used_clusters = calloc(size, 1); @@ -2803,11 +2804,16 @@ static int enable_write_target(BDRVVVFATState *s) if (bdrv_create(bdrv_qcow, s->qcow_filename, options) < 0) return -1; + s->qcow = bdrv_new(""); - if (s->qcow == NULL || - bdrv_open(s->qcow, s->qcow_filename, BDRV_O_RDWR, bdrv_qcow) < 0) - { - return -1; + if (s->qcow == NULL) { + return -1; + } + + ret = bdrv_open(s->qcow, s->qcow_filename, + BDRV_O_RDWR | BDRV_O_CACHE_WB | BDRV_O_NO_FLUSH, bdrv_qcow); + if (ret < 0) { + return ret; } #ifndef _WIN32 |