izzy/xemu
0
0
Fork 0
mirror of https://github.com/izzy2lost/xemu.git synced 2026-07-06 00:20:22 -07:00
Code Issues Packages Projects Releases Wiki Activity

hw/hyperv/syndbg: skip automatic zero-init of large array

Browse Source 
The 'handle_recv_msg' method has a 4k byte array used for copying
data between the network socket and guest memory. Skip the automatic
zero-init of this array to eliminate the performance overhead in the
I/O hot path.

The 'data_buf' array will be fully initialized when data is read
off the network socket.

Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: 20250610123709.835102-18-berrange@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Daniel P. Berrangé
2025-06-12 13:40:15 -04:00
committed by Stefan Hajnoczi
parent 7048e70f39
commit 5a1f614d0c
1 changed files with 1 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files
hw/hyperv/syndbg.c
+1 -1
View File
@@ -192,7 +192,7 @@ static uint16_t handle_recv_msg(HvSynDbg *syndbg, uint64_t outgpa,
{
uint16_t ret;
g_assert(MSG_BUFSZ >= qemu_target_page_size());
uint8_t data_buf[MSG_BUFSZ];
QEMU_UNINITIALIZED uint8_t data_buf[MSG_BUFSZ];
hwaddr out_len;
void *out_data;
ssize_t recv_byte_count;