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[Qemu-devel] [PATCH 3/3] blockdev: flip default cache mode from writethr
From: |
Paolo Bonzini |
Subject: |
[Qemu-devel] [PATCH 3/3] blockdev: flip default cache mode from writethrough to writeback |
Date: |
Thu, 9 Aug 2012 16:07:21 +0200 |
Now all major device models (IDE, SCSI, virtio) can choose between
writethrough and writeback at run-time, and virtio will even revert
to writethrough if the guest is not capable of sending flushes. So
we can change the default to writeback at last.
Tested, for lack of a better idea, with a breakpoint on bdrv_open
and all cache choices one by one.
Signed-off-by: Paolo Bonzini <address@hidden>
---
blockdev.c | 1 +
1 file modificato, 1 inserzione(+)
diff --git a/blockdev.c b/blockdev.c
index 8669142..7c83baa 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -377,6 +377,7 @@ DriveInfo *drive_init(QemuOpts *opts, int default_to_scsi)
}
}
+ bdrv_flags |= BDRV_O_CACHE_WB;
if ((buf = qemu_opt_get(opts, "cache")) != NULL) {
if (bdrv_parse_cache_flags(buf, &bdrv_flags) != 0) {
error_report("invalid cache option");
--
1.7.11.2