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| author |   Yafang Shao <laoar.shao@gmail.com> | 2020-03-16 21:28:05 -0400 |
|---|---|---|
| committer |   Peter Zijlstra <peterz@infradead.org> | 2020-03-20 13:06:19 +0100 |
| commit | 1066d1b6974e095d5a6c472ad9180a957b496cd6 (patch) | |
| tree | 32f387de4a544bdc0772949e6ffe9464ea229bc0 /include/linux/sched.h | |
| parent | MAINTAINERS: Add maintenance information for psi (diff) | |
| download | wireguard-linux-1066d1b6974e095d5a6c472ad9180a957b496cd6.tar.xz wireguard-linux-1066d1b6974e095d5a6c472ad9180a957b496cd6.zip | |
psi: Move PF_MEMSTALL out of task->flags
The task->flags is a 32-bits flag, in which 31 bits have already been
consumed. So it is hardly to introduce other new per process flag.
Currently there're still enough spaces in the bit-field section of
task_struct, so we can define the memstall state as a single bit in
task_struct instead.
This patch also removes an out-of-date comment pointed by Matthew.
Suggested-by: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Yafang Shao <laoar.shao@gmail.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Link: https://lkml.kernel.org/r/1584408485-1921-1-git-send-email-laoar.shao@gmail.com
Diffstat (limited to 'include/linux/sched.h')
| -rw-r--r-- | include/linux/sched.h | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/include/linux/sched.h b/include/linux/sched.h index 2e9199bf947b..09bddd9e69a2 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -785,9 +785,12 @@ struct task_struct { unsigned frozen:1; #endif #ifdef CONFIG_BLK_CGROUP - /* to be used once the psi infrastructure lands upstream. */ unsigned use_memdelay:1; #endif +#ifdef CONFIG_PSI + /* Stalled due to lack of memory */ + unsigned in_memstall:1; +#endif unsigned long atomic_flags; /* Flags requiring atomic access. */ @@ -1480,7 +1483,6 @@ extern struct pid *cad_pid; #define PF_KTHREAD 0x00200000 /* I am a kernel thread */ #define PF_RANDOMIZE 0x00400000 /* Randomize virtual address space */ #define PF_SWAPWRITE 0x00800000 /* Allowed to write to swap */ -#define PF_MEMSTALL 0x01000000 /* Stalled due to lack of memory */ #define PF_UMH 0x02000000 /* I'm an Usermodehelper process */ #define PF_NO_SETAFFINITY 0x04000000 /* Userland is not allowed to meddle with cpus_mask */ #define PF_MCE_EARLY 0x08000000 /* Early kill for mce process policy */ |