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| author | Daniel P. Berrangé <berrange@redhat.com> | 2025-06-10 13:36:41 +0100 |
|---|---|---|
| committer | Stefan Hajnoczi <stefanha@redhat.com> | 2025-06-12 13:39:08 -0400 |
| commit | 83750c1da807c973b0b11d977d61df7e41122d03 (patch) | |
| tree | 24d728fbefb5300c6d9f3081aac9e8eff0a7a90d | |
| parent | ba2868ce091cd4abe4be6de4b7e44b3be303b352 (diff) | |
| download | qemu-83750c1da807c973b0b11d977d61df7e41122d03.zip qemu-83750c1da807c973b0b11d977d61df7e41122d03.tar.gz qemu-83750c1da807c973b0b11d977d61df7e41122d03.tar.bz2 | |
block: skip automatic zero-init of large array in ioq_submit
The 'ioq_submit' method has a struct array that is 8k in size.
Skip the automatic zero-init of this array to eliminate the
performance overhead in the I/O hot path.
The 'iocbs' array will selectively initialized when processing
the I/O data.
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: 20250610123709.835102-4-berrange@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
| -rw-r--r-- | block/linux-aio.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/block/linux-aio.c b/block/linux-aio.c index 407369f..c200e7a 100644 --- a/block/linux-aio.c +++ b/block/linux-aio.c @@ -291,7 +291,7 @@ static void ioq_submit(LinuxAioState *s) { int ret, len; struct qemu_laiocb *aiocb; - struct iocb *iocbs[MAX_EVENTS]; + QEMU_UNINITIALIZED struct iocb *iocbs[MAX_EVENTS]; QSIMPLEQ_HEAD(, qemu_laiocb) completed; do { |