做網(wǎng)站的銷售團(tuán)隊(duì)合肥網(wǎng)絡(luò)推廣服務(wù)
/* * 這些是 CFQ（完全公平排隊(duì)）實(shí)現(xiàn)的 I/O 優(yōu)先級(jí)組。
RT 是實(shí)時(shí)類，它總是能獲得優(yōu)質(zhì)服務(wù)。
BE 是盡力而為的調(diào)度類，是任何進(jìn)程的默認(rèn)類別。
IDLE 是空閑調(diào)度類，只有在沒有其他人使用磁盤時(shí)才會(huì)被服務(wù)。
*/
/*
?* These are the io priority groups as implemented by CFQ. RT is the realtime
?* class, it always gets premium service. BE is the best-effort scheduling
?* class, the default for any process. IDLE is the idle scheduling class, it
?* is only served when no one else is using the disk.
?*/
enum {
?? ?IOPRIO_CLASS_NONE,
?? ?IOPRIO_CLASS_RT,
?? ?IOPRIO_CLASS_BE,
?? ?IOPRIO_CLASS_IDLE,
};
#define IOPRIO_PRIO_VALUE(class, data)?? ?(((class) << IOPRIO_CLASS_SHIFT) | data)
?
#define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3))
?