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| author | Daniel P. Berrangé <berrange@redhat.com> | 2025-06-10 13:37:05 +0100 |
|---|---|---|
| committer | Stefan Hajnoczi <stefanha@redhat.com> | 2025-06-12 13:40:16 -0400 |
| commit | 55243edf42ee87bce9f36ca251f3ab9cda1563e4 (patch) | |
| tree | 4748e0009d8dd6a29d578fae6cd3c3e77c5fcf06 | |
| parent | 14997d521d1cd0bb36c902ef1032f0d3f2a3c912 (diff) | |
| download | qemu-55243edf42ee87bce9f36ca251f3ab9cda1563e4.zip qemu-55243edf42ee87bce9f36ca251f3ab9cda1563e4.tar.gz qemu-55243edf42ee87bce9f36ca251f3ab9cda1563e4.tar.bz2 | |
hw/scsi/lsi53c895a: skip automatic zero-init of large array
The 'lsi_memcpy' method has a 4k byte array used for copying data
to/from the device. Skip the automatic zero-init of this array to
eliminate the performance overhead in the I/O hot path.
The 'buf' array will be fully initialized when data is copied.
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: 20250610123709.835102-28-berrange@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
| -rw-r--r-- | hw/scsi/lsi53c895a.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/hw/scsi/lsi53c895a.c b/hw/scsi/lsi53c895a.c index f4f2ef3..9ea4aa0 100644 --- a/hw/scsi/lsi53c895a.c +++ b/hw/scsi/lsi53c895a.c @@ -1112,7 +1112,7 @@ bad: static void lsi_memcpy(LSIState *s, uint32_t dest, uint32_t src, int count) { int n; - uint8_t buf[LSI_BUF_SIZE]; + QEMU_UNINITIALIZED uint8_t buf[LSI_BUF_SIZE]; trace_lsi_memcpy(dest, src, count); while (count) { |