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sched_ext: Make scx_exit() and scx_vexit() return bool

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Make scx_exit() and scx_vexit() return bool indicating whether the calling
thread successfully claimed the exit. This will be used by the abort mechanism
added in a later patch.

Reviewed-by: Dan Schatzberg <schatzberg.dan@gmail.com>
Reviewed-by: Andrea Righi <arighi@nvidia.com>
Cc: Emil Tsalapatis <etsal@meta.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Tejun Heo
2025-11-11 09:18:09 -10:00
parent 5ebec443fb
commit f2fe382e1f
1 changed files with 9 additions and 5 deletions
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14
kernel/sched/ext.c
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@@ -174,18 +174,21 @@ MODULE_PARM_DESC(slice_bypass_us, "bypass slice in microseconds, applied on [un]
static void process_ddsp_deferred_locals(struct rq *rq);
static u32 reenq_local(struct rq *rq);
static void scx_kick_cpu(struct scx_sched *sch, s32 cpu, u64 flags);
static void scx_vexit(struct scx_sched *sch, enum scx_exit_kind kind,
static bool scx_vexit(struct scx_sched *sch, enum scx_exit_kind kind,
s64 exit_code, const char *fmt, va_list args);
static __printf(4, 5) void scx_exit(struct scx_sched *sch,
static __printf(4, 5) bool scx_exit(struct scx_sched *sch,
enum scx_exit_kind kind, s64 exit_code,
const char *fmt, ...)
{
va_list args;
bool ret;
va_start(args, fmt);
scx_vexit(sch, kind, exit_code, fmt, args);
ret = scx_vexit(sch, kind, exit_code, fmt, args);
va_end(args);
return ret;
}
#define scx_error(sch, fmt, args...) scx_exit((sch), SCX_EXIT_ERROR, 0, fmt, ##args)
@@ -4400,14 +4403,14 @@ static void scx_error_irq_workfn(struct irq_work *irq_work)
kthread_queue_work(sch->helper, &sch->disable_work);
}
static void scx_vexit(struct scx_sched *sch,
static bool scx_vexit(struct scx_sched *sch,
enum scx_exit_kind kind, s64 exit_code,
const char *fmt, va_list args)
{
struct scx_exit_info *ei = sch->exit_info;
if (!scx_claim_exit(sch, kind))
return;
return false;
ei->exit_code = exit_code;
#ifdef CONFIG_STACKTRACE
@@ -4424,6 +4427,7 @@ static void scx_vexit(struct scx_sched *sch,
ei->reason = scx_exit_reason(ei->kind);
irq_work_queue(&sch->error_irq_work);
return true;
}
static int alloc_kick_syncs(void)