Revision 0af83abbd4a6e36a4b209d8c57c26143e40eeec1 authored by Liu Song on 06 August 2019, 14:21:40 UTC, committed by Richard Weinberger on 22 August 2019, 15:25:33 UTC
If the number of dirty pages to be written back is large,
then writeback_inodes_sb will block waiting for a long time,
causing hung task detection alarm. Therefore, we should limit
the maximum number of pages written back this time, which let
the budget be completed faster. The remaining dirty pages
tend to rely on the writeback mechanism to complete the
synchronization.
Fixes: b6e51316daed ("writeback: separate starting of sync vs opportunistic writeback")
Signed-off-by: Liu Song <liu.song11@zte.com.cn>
Signed-off-by: Richard Weinberger <richard@nod.at>
1 parent 377e208
smpboot.h
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef SMPBOOT_H
#define SMPBOOT_H
struct task_struct;
#ifdef CONFIG_GENERIC_SMP_IDLE_THREAD
struct task_struct *idle_thread_get(unsigned int cpu);
void idle_thread_set_boot_cpu(void);
void idle_threads_init(void);
#else
static inline struct task_struct *idle_thread_get(unsigned int cpu) { return NULL; }
static inline void idle_thread_set_boot_cpu(void) { }
static inline void idle_threads_init(void) { }
#endif
int smpboot_create_threads(unsigned int cpu);
int smpboot_park_threads(unsigned int cpu);
int smpboot_unpark_threads(unsigned int cpu);
void __init cpuhp_threads_init(void);
#endif
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