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vvfat: Use cache=unsafe

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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>
This commit is contained in:
Kevin Wolf 2010-09-10 12:27:04 +02:00 committed by Kevin Wolf
parent 9217e26f43
commit a655211ac6
1 changed files with 10 additions and 4 deletions
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12
block/vvfat.c
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@ -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);
@ -2803,13 +2804,18 @@ 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)
{
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
unlink(s->qcow_filename);
#endif