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| author | Daniel P. Berrangé <berrange@redhat.com> | 2025-06-10 13:37:07 +0100 |
|---|---|---|
| committer | Stefan Hajnoczi <stefanha@redhat.com> | 2025-06-12 13:40:16 -0400 |
| commit | 7708e298180550eac262c1fd742e6e80c711a5d8 (patch) | |
| tree | 6d036dc512959c739460f0ca2c3ac9eb10d3739a | |
| parent | ca0559e2350c618048f7caf80cb79c1259e7cfd2 (diff) | |
| download | qemu-7708e298180550eac262c1fd742e6e80c711a5d8.zip qemu-7708e298180550eac262c1fd742e6e80c711a5d8.tar.gz qemu-7708e298180550eac262c1fd742e6e80c711a5d8.tar.bz2 | |
hw/ufs/lu: skip automatic zero-init of large array
The 'ufs_emulate_scsi_cmd' method has a 4k byte array used for
copying data from the device. Skip the automatic zero-init of
this array to eliminate the performance overhead in the I/O hot
path.
The 'outbuf' array will be fully initialized when data is copied
from the guest.
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Klaus Jensen <k.jensen@samsung.com>
Reviewed-by: Harsh Prateek Bora <harshpb@linux.ibm.com>
Message-id: 20250610123709.835102-30-berrange@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
| -rw-r--r-- | hw/ufs/lu.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/hw/ufs/lu.c b/hw/ufs/lu.c index 57b307e..2d8ffd7 100644 --- a/hw/ufs/lu.c +++ b/hw/ufs/lu.c @@ -194,7 +194,7 @@ static int ufs_emulate_wlun_inquiry(UfsRequest *req, uint8_t *outbuf, static UfsReqResult ufs_emulate_scsi_cmd(UfsLu *lu, UfsRequest *req) { uint8_t lun = lu->lun; - uint8_t outbuf[4096]; + QEMU_UNINITIALIZED uint8_t outbuf[4096]; uint8_t sense_buf[UFS_SENSE_SIZE]; uint8_t scsi_status; int len = 0; |