[tip: sched/core] sched: Show PF_flag holes

[tip-bot2 for Peter Zijlstra]

The following commit has been merged into the sched/core branch of tip:

Commit-ID:     fb04563d1cae6f361892b4a339ad92100b1eb0d0
Gitweb:        https://git.kernel.org/tip/fb04563d1cae6f361892b4a339ad92100b1eb0d0
Author:        Peter Zijlstra <peterz@xxxxxxxxxxxxx>
AuthorDate:    Tue, 06 Sep 2022 13:27:32 +02:00
Committer:     Peter Zijlstra <peterz@xxxxxxxxxxxxx>
CommitterDate: Wed, 07 Sep 2022 21:53:51 +02:00

sched: Show PF_flag holes

Put placeholders in PF_flag so we can see how holey it is.

Suggested-by: Ingo Molnar <mingo@xxxxxxxxxx>
Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Reviewed-by: Ingo Molnar <mingo@xxxxxxxxxx>
Link: https://lkml.kernel.org/r/YxctoffFFPXONESt@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
---
 include/linux/sched.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/include/linux/sched.h b/include/linux/sched.h
index 4c91efd..15e3bd9 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1722,7 +1722,9 @@ extern struct pid *cad_pid;
 #define PF_MEMALLOC		0x00000800	/* Allocating memory */
 #define PF_NPROC_EXCEEDED	0x00001000	/* set_user() noticed that RLIMIT_NPROC was exceeded */
 #define PF_USED_MATH		0x00002000	/* If unset the fpu must be initialized before use */
+#define PF__HOLE__00004000	0x00004000
 #define PF_NOFREEZE		0x00008000	/* This thread should not be frozen */
+#define PF__HOLE__00010000	0x00010000
 #define PF_KSWAPD		0x00020000	/* I am kswapd */
 #define PF_MEMALLOC_NOFS	0x00040000	/* All allocation requests will inherit GFP_NOFS */
 #define PF_MEMALLOC_NOIO	0x00080000	/* All allocation requests will inherit GFP_NOIO */
@@ -1730,9 +1732,14 @@ extern struct pid *cad_pid;
 						 * I am cleaning dirty pages from some other bdi. */
 #define PF_KTHREAD		0x00200000	/* I am a kernel thread */
 #define PF_RANDOMIZE		0x00400000	/* Randomize virtual address space */
+#define PF__HOLE__00800000	0x00800000
+#define PF__HOLE__01000000	0x01000000
+#define PF__HOLE__02000000	0x02000000
 #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 */
 #define PF_MEMALLOC_PIN		0x10000000	/* Allocation context constrained to zones which allow long term pinning. */
+#define PF__HOLE__20000000	0x20000000
+#define PF__HOLE__40000000	0x40000000
 #define PF_SUSPEND_TASK		0x80000000      /* This thread called freeze_processes() and should not be frozen */
 
 /*