From: Andreas Färber <afaer...@suse.de>
The implementation of the ATA FLUSH command invokes a flush at the block
layer, which may on raw files on POSIX entail a synchronous fdatasync().
This may in some cases take so long that the SLES 11 SP1 guest driver
reports I/O errors and filesystems get corrupted or remounted read-only.
Avoid this by setting BUSY_STAT, so that the guest is made aware we are
in the middle of an operation and no ATA commands are attempted to be
processed concurrently.
Addresses BNC#637297.
Suggested-by: Gonglei (Arei) <arei.gong...@huawei.com>
Signed-off-by: Andreas Färber <afaer...@suse.de>
Signed-off-by: Kevin Wolf <kw...@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefa...@redhat.com>
(cherry picked from commit f68ec8379e88502b4841a110c070e9b118d3151c)
Signed-off-by: Michael Roth <mdr...@linux.vnet.ibm.com>
---
hw/ide/core.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/hw/ide/core.c b/hw/ide/core.c
index c7a8041..9926d92 100644
--- a/hw/ide/core.c
+++ b/hw/ide/core.c
@@ -814,6 +814,7 @@ void ide_flush_cache(IDEState *s)
return;
}
+ s->status |= BUSY_STAT;
bdrv_acct_start(s->bs, &s->acct, 0, BDRV_ACCT_FLUSH);
bdrv_aio_flush(s->bs, ide_flush_cb, s);
}
--
1.7.9.5
