diff options
author | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2013-07-27 22:07:53 +0000 |
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committer | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2013-07-27 22:07:53 +0000 |
commit | 4fbe7358c7747a9165f776eb19addbb9baf7def2 (patch) | |
tree | bc7076b4f6d10c2cc2942539bb666e50f0b66954 /libdde_linux26/contrib/include/linux/ioprio.h | |
parent | 21adb5284111190057db245cfc2b54091920c373 (diff) |
rename libdde_linux26 into libdde-linux26 to make dpkg-source happy
Diffstat (limited to 'libdde_linux26/contrib/include/linux/ioprio.h')
-rw-r--r-- | libdde_linux26/contrib/include/linux/ioprio.h | 91 |
1 files changed, 0 insertions, 91 deletions
diff --git a/libdde_linux26/contrib/include/linux/ioprio.h b/libdde_linux26/contrib/include/linux/ioprio.h deleted file mode 100644 index 76dad480..00000000 --- a/libdde_linux26/contrib/include/linux/ioprio.h +++ /dev/null @@ -1,91 +0,0 @@ -#ifndef IOPRIO_H -#define IOPRIO_H - -#include <linux/sched.h> -#include <linux/iocontext.h> - -/* - * Gives us 8 prio classes with 13-bits of data for each class - */ -#define IOPRIO_BITS (16) -#define IOPRIO_CLASS_SHIFT (13) -#define IOPRIO_PRIO_MASK ((1UL << IOPRIO_CLASS_SHIFT) - 1) - -#define IOPRIO_PRIO_CLASS(mask) ((mask) >> IOPRIO_CLASS_SHIFT) -#define IOPRIO_PRIO_DATA(mask) ((mask) & IOPRIO_PRIO_MASK) -#define IOPRIO_PRIO_VALUE(class, data) (((class) << IOPRIO_CLASS_SHIFT) | data) - -#define ioprio_valid(mask) (IOPRIO_PRIO_CLASS((mask)) != IOPRIO_CLASS_NONE) - -/* - * 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, -}; - -/* - * 8 best effort priority levels are supported - */ -#define IOPRIO_BE_NR (8) - -enum { - IOPRIO_WHO_PROCESS = 1, - IOPRIO_WHO_PGRP, - IOPRIO_WHO_USER, -}; - -/* - * if process has set io priority explicitly, use that. if not, convert - * the cpu scheduler nice value to an io priority - */ -#define IOPRIO_NORM (4) -static inline int task_ioprio(struct io_context *ioc) -{ - if (ioprio_valid(ioc->ioprio)) - return IOPRIO_PRIO_DATA(ioc->ioprio); - - return IOPRIO_NORM; -} - -static inline int task_ioprio_class(struct io_context *ioc) -{ - if (ioprio_valid(ioc->ioprio)) - return IOPRIO_PRIO_CLASS(ioc->ioprio); - - return IOPRIO_CLASS_BE; -} - -static inline int task_nice_ioprio(struct task_struct *task) -{ - return (task_nice(task) + 20) / 5; -} - -/* - * This is for the case where the task hasn't asked for a specific IO class. - * Check for idle and rt task process, and return appropriate IO class. - */ -static inline int task_nice_ioclass(struct task_struct *task) -{ - if (task->policy == SCHED_IDLE) - return IOPRIO_CLASS_IDLE; - else if (task->policy == SCHED_FIFO || task->policy == SCHED_RR) - return IOPRIO_CLASS_RT; - else - return IOPRIO_CLASS_BE; -} - -/* - * For inheritance, return the highest of the two given priorities - */ -extern int ioprio_best(unsigned short aprio, unsigned short bprio); - -extern int set_task_ioprio(struct task_struct *task, int ioprio); - -#endif |