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Blue Swirl
97bbb109b1
Report from pahole on amd64 host:
struct MiscState {
SysBusDevice busdev; /* 0 5648 */
/* --- cacheline 88 boundary (5632 bytes) was 16 bytes ago --- */
qemu_irq irq; /* 5648 8 */
uint32_t dummy; /* 5656 4 */
uint8_t config; /* 5660 1 */
uint8_t aux1; /* 5661 1 */
uint8_t aux2; /* 5662 1 */
uint8_t diag; /* 5663 1 */
uint8_t mctrl; /* 5664 1 */
uint8_t sysctrl; /* 5665 1 */
uint16_t leds; /* 5666 2 */
/* XXX 4 bytes hole, try to pack */
qemu_irq fdc_tc; /* 5672 8 */
/* size: 5680, cachelines: 89 */
/* sum members: 5676, holes: 1, sum holes: 4 */
/* last cacheline: 48 bytes */
}; /* definitions: 1 */
Fix by rearranging the structure to avoid padding.
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Read the documentation in qemu-doc.html. Fabrice Bellard.