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SubjectRe: [PATCH 1/6] Container Freezer: Add TIF_FREEZE flag to all architectures
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Hi.

On Thu, 2008-07-31 at 22:07 -0700, Matt Helsley wrote:
> This patch is the first step in making the refrigerator() available
> to all architectures, even for those without power management.
>
> The purpose of such a change is to be able to use the refrigerator()
> in a new control group subsystem which will implement a control group
> freezer.

Is there a reason for always using 19, rather than just the next
available bit?

Regards,

Nigel

> Signed-off-by: Cedric Le Goater <clg@fr.ibm.com>
> Signed-off-by: Matt Helsley <matthltc@us.ibm.com>
> Acked-by: Pavel Machek <pavel@suse.cz>
> Acked-by: Serge E. Hallyn <serue@us.ibm.com>
> Tested-by: Matt Helsley <matthltc@us.ibm.com>
> ---
> arch/parisc/include/asm/thread_info.h | 2 ++
> arch/sparc/include/asm/thread_info_32.h | 2 ++
> arch/sparc/include/asm/thread_info_64.h | 2 ++
> include/asm-alpha/thread_info.h | 2 ++
> include/asm-avr32/thread_info.h | 1 +
> include/asm-cris/thread_info.h | 2 ++
> include/asm-h8300/thread_info.h | 2 ++
> include/asm-m68k/thread_info.h | 1 +
> include/asm-m68knommu/thread_info.h | 2 ++
> include/asm-s390/thread_info.h | 2 ++
> include/asm-um/thread_info.h | 2 ++
> include/asm-xtensa/thread_info.h | 2 ++
> 12 files changed, 22 insertions(+)
>
> Index: linux-2.6.27-rc1-mm1/arch/sparc/include/asm/thread_info_32.h
> ===================================================================
> --- linux-2.6.27-rc1-mm1.orig/arch/sparc/include/asm/thread_info_32.h
> +++ linux-2.6.27-rc1-mm1/arch/sparc/include/asm/thread_info_32.h
> @@ -137,10 +137,11 @@ BTFIXUPDEF_CALL(void, free_thread_info,
> #define TIF_USEDFPU 8 /* FPU was used by this task
> * this quantum (SMP) */
> #define TIF_POLLING_NRFLAG 9 /* true if poll_idle() is polling
> * TIF_NEED_RESCHED */
> #define TIF_MEMDIE 10
> +#define TIF_FREEZE 19 /* is freezing for suspend */
>
> /* as above, but as bit values */
> #define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
> #define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
> #define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
> @@ -150,9 +151,10 @@ BTFIXUPDEF_CALL(void, free_thread_info,
> #define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
>
> #define _TIF_DO_NOTIFY_RESUME_MASK (_TIF_NOTIFY_RESUME | \
> _TIF_SIGPENDING | \
> _TIF_RESTORE_SIGMASK)
> +#define TIF_FREEZE (1<<TIF_FREEZE)
>
> #endif /* __KERNEL__ */
>
> #endif /* _ASM_THREAD_INFO_H */
> Index: linux-2.6.27-rc1-mm1/arch/sparc/include/asm/thread_info_64.h
> ===================================================================
> --- linux-2.6.27-rc1-mm1.orig/arch/sparc/include/asm/thread_info_64.h
> +++ linux-2.6.27-rc1-mm1/arch/sparc/include/asm/thread_info_64.h
> @@ -235,10 +235,11 @@ register struct thread_info *current_thr
> * an immediate value in instructions such as andcc.
> */
> #define TIF_ABI_PENDING 12
> #define TIF_MEMDIE 13
> #define TIF_POLLING_NRFLAG 14
> +#define TIF_FREEZE 19 /* is freezing for suspend */
>
> #define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
> #define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
> #define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
> #define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
> @@ -247,10 +248,11 @@ register struct thread_info *current_thr
> #define _TIF_32BIT (1<<TIF_32BIT)
> #define _TIF_SECCOMP (1<<TIF_SECCOMP)
> #define _TIF_SYSCALL_AUDIT (1<<TIF_SYSCALL_AUDIT)
> #define _TIF_ABI_PENDING (1<<TIF_ABI_PENDING)
> #define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
> +#define _TIF_FREEZE (1<<TIF_FREEZE)
>
> #define _TIF_USER_WORK_MASK ((0xff << TI_FLAG_WSAVED_SHIFT) | \
> _TIF_DO_NOTIFY_RESUME_MASK | \
> _TIF_NEED_RESCHED | _TIF_PERFCTR)
> #define _TIF_DO_NOTIFY_RESUME_MASK (_TIF_NOTIFY_RESUME | _TIF_SIGPENDING)
> Index: linux-2.6.27-rc1-mm1/include/asm-alpha/thread_info.h
> ===================================================================
> --- linux-2.6.27-rc1-mm1.orig/include/asm-alpha/thread_info.h
> +++ linux-2.6.27-rc1-mm1/include/asm-alpha/thread_info.h
> @@ -72,16 +72,18 @@ register struct thread_info *__current_t
> #define TIF_UAC_NOPRINT 5 /* see sysinfo.h */
> #define TIF_UAC_NOFIX 6
> #define TIF_UAC_SIGBUS 7
> #define TIF_MEMDIE 8
> #define TIF_RESTORE_SIGMASK 9 /* restore signal mask in do_signal */
> +#define TIF_FREEZE 19 /* is freezing for suspend */
>
> #define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
> #define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
> #define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
> #define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
> #define _TIF_RESTORE_SIGMASK (1<<TIF_RESTORE_SIGMASK)
> +#define _TIF_FREEZE (1<<TIF_FREEZE)
>
> /* Work to do on interrupt/exception return. */
> #define _TIF_WORK_MASK (_TIF_SIGPENDING | _TIF_NEED_RESCHED)
>
> /* Work to do on any return to userspace. */
> Index: linux-2.6.27-rc1-mm1/include/asm-avr32/thread_info.h
> ===================================================================
> --- linux-2.6.27-rc1-mm1.orig/include/asm-avr32/thread_info.h
> +++ linux-2.6.27-rc1-mm1/include/asm-avr32/thread_info.h
> @@ -94,10 +94,11 @@ static inline struct thread_info *curren
> #define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG)
> #define _TIF_SINGLE_STEP (1 << TIF_SINGLE_STEP)
> #define _TIF_MEMDIE (1 << TIF_MEMDIE)
> #define _TIF_RESTORE_SIGMASK (1 << TIF_RESTORE_SIGMASK)
> #define _TIF_CPU_GOING_TO_SLEEP (1 << TIF_CPU_GOING_TO_SLEEP)
> +#define _TIF_FREEZE (1 << TIF_FREEZE)
>
> /* Note: The masks below must never span more than 16 bits! */
>
> /* work to do on interrupt/exception return */
> #define _TIF_WORK_MASK \
> Index: linux-2.6.27-rc1-mm1/include/asm-cris/thread_info.h
> ===================================================================
> --- linux-2.6.27-rc1-mm1.orig/include/asm-cris/thread_info.h
> +++ linux-2.6.27-rc1-mm1/include/asm-cris/thread_info.h
> @@ -86,17 +86,19 @@ struct thread_info {
> #define TIF_SIGPENDING 2 /* signal pending */
> #define TIF_NEED_RESCHED 3 /* rescheduling necessary */
> #define TIF_RESTORE_SIGMASK 9 /* restore signal mask in do_signal() */
> #define TIF_POLLING_NRFLAG 16 /* true if poll_idle() is polling TIF_NEED_RESCHED */
> #define TIF_MEMDIE 17
> +#define TIF_FREEZE 19 /* is freezing for suspend */
>
> #define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
> #define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
> #define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
> #define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
> #define _TIF_RESTORE_SIGMASK (1<<TIF_RESTORE_SIGMASK)
> #define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
> +#define _TIF_FREEZE (1<<TIF_FREEZE)
>
> #define _TIF_WORK_MASK 0x0000FFFE /* work to do on interrupt/exception return */
> #define _TIF_ALLWORK_MASK 0x0000FFFF /* work to do on any return to u-space */
>
> #endif /* __KERNEL__ */
> Index: linux-2.6.27-rc1-mm1/include/asm-h8300/thread_info.h
> ===================================================================
> --- linux-2.6.27-rc1-mm1.orig/include/asm-h8300/thread_info.h
> +++ linux-2.6.27-rc1-mm1/include/asm-h8300/thread_info.h
> @@ -87,17 +87,19 @@ static inline struct thread_info *curren
> #define TIF_NEED_RESCHED 2 /* rescheduling necessary */
> #define TIF_POLLING_NRFLAG 3 /* true if poll_idle() is polling
> TIF_NEED_RESCHED */
> #define TIF_MEMDIE 4
> #define TIF_RESTORE_SIGMASK 5 /* restore signal mask in do_signal() */
> +#define TIF_FREEZE 19 /* is freezing for suspend */
>
> /* as above, but as bit values */
> #define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
> #define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
> #define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
> #define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
> #define _TIF_RESTORE_SIGMASK (1<<TIF_RESTORE_SIGMASK)
> +#define _TIF_FREEZE (1<<TIF_FREEZE)
>
> #define _TIF_WORK_MASK 0x0000FFFE /* work to do on interrupt/exception return */
>
> #endif /* __KERNEL__ */
>
> Index: linux-2.6.27-rc1-mm1/include/asm-m68k/thread_info.h
> ===================================================================
> --- linux-2.6.27-rc1-mm1.orig/include/asm-m68k/thread_info.h
> +++ linux-2.6.27-rc1-mm1/include/asm-m68k/thread_info.h
> @@ -50,7 +50,8 @@ struct thread_info {
> #define TIF_SIGPENDING 6 /* signal pending */
> #define TIF_NEED_RESCHED 7 /* rescheduling necessary */
> #define TIF_DELAYED_TRACE 14 /* single step a syscall */
> #define TIF_SYSCALL_TRACE 15 /* syscall trace active */
> #define TIF_MEMDIE 16
> +#define TIF_FREEZE 19 /* thread is freezing for suspend */
>
> #endif /* _ASM_M68K_THREAD_INFO_H */
> Index: linux-2.6.27-rc1-mm1/include/asm-m68knommu/thread_info.h
> ===================================================================
> --- linux-2.6.27-rc1-mm1.orig/include/asm-m68knommu/thread_info.h
> +++ linux-2.6.27-rc1-mm1/include/asm-m68knommu/thread_info.h
> @@ -82,16 +82,18 @@ static inline struct thread_info *curren
> #define TIF_SIGPENDING 1 /* signal pending */
> #define TIF_NEED_RESCHED 2 /* rescheduling necessary */
> #define TIF_POLLING_NRFLAG 3 /* true if poll_idle() is polling
> TIF_NEED_RESCHED */
> #define TIF_MEMDIE 4
> +#define TIF_FREEZE 19 /* is freezing for suspend */
>
> /* as above, but as bit values */
> #define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
> #define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
> #define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
> #define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
> +#define _TIF_FREEZE (1<<TIF_FREEZE)
>
> #define _TIF_WORK_MASK 0x0000FFFE /* work to do on interrupt/exception return */
>
> #endif /* __KERNEL__ */
>
> Index: linux-2.6.27-rc1-mm1/include/asm-s390/thread_info.h
> ===================================================================
> --- linux-2.6.27-rc1-mm1.orig/include/asm-s390/thread_info.h
> +++ linux-2.6.27-rc1-mm1/include/asm-s390/thread_info.h
> @@ -96,10 +96,11 @@ static inline struct thread_info *curren
> #define TIF_POLLING_NRFLAG 17 /* true if poll_idle() is polling
> TIF_NEED_RESCHED */
> #define TIF_31BIT 18 /* 32bit process */
> #define TIF_MEMDIE 19
> #define TIF_RESTORE_SIGMASK 20 /* restore signal mask in do_signal() */
> +#define TIF_FREEZE 21 /* thread is freezing for suspend */
>
> #define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
> #define _TIF_RESTORE_SIGMASK (1<<TIF_RESTORE_SIGMASK)
> #define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
> #define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
> @@ -108,10 +109,11 @@ static inline struct thread_info *curren
> #define _TIF_SINGLE_STEP (1<<TIF_SINGLE_STEP)
> #define _TIF_MCCK_PENDING (1<<TIF_MCCK_PENDING)
> #define _TIF_USEDFPU (1<<TIF_USEDFPU)
> #define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
> #define _TIF_31BIT (1<<TIF_31BIT)
> +#define _TIF_FREEZE (1<<TIF_FREEZE)
>
> #endif /* __KERNEL__ */
>
> #define PREEMPT_ACTIVE 0x4000000
>
> Index: linux-2.6.27-rc1-mm1/include/asm-um/thread_info.h
> ===================================================================
> --- linux-2.6.27-rc1-mm1.orig/include/asm-um/thread_info.h
> +++ linux-2.6.27-rc1-mm1/include/asm-um/thread_info.h
> @@ -67,15 +67,17 @@ static inline struct thread_info *curren
> */
> #define TIF_RESTART_BLOCK 4
> #define TIF_MEMDIE 5
> #define TIF_SYSCALL_AUDIT 6
> #define TIF_RESTORE_SIGMASK 7
> +#define TIF_FREEZE 19 /* is freezing for suspend */
>
> #define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
> #define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
> #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
> #define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG)
> #define _TIF_MEMDIE (1 << TIF_MEMDIE)
> #define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
> #define _TIF_RESTORE_SIGMASK (1 << TIF_RESTORE_SIGMASK)
> +#define _TIF_FREEZE (1 << TIF_FREEZE)
>
> #endif
> Index: linux-2.6.27-rc1-mm1/include/asm-xtensa/thread_info.h
> ===================================================================
> --- linux-2.6.27-rc1-mm1.orig/include/asm-xtensa/thread_info.h
> +++ linux-2.6.27-rc1-mm1/include/asm-xtensa/thread_info.h
> @@ -132,18 +132,20 @@ static inline struct thread_info *curren
> #define TIF_SINGLESTEP 3 /* restore singlestep on return to user mode */
> #define TIF_IRET 4 /* return with iret */
> #define TIF_MEMDIE 5
> #define TIF_RESTORE_SIGMASK 6 /* restore signal mask in do_signal() */
> #define TIF_POLLING_NRFLAG 16 /* true if poll_idle() is polling TIF_NEED_RESCHED */
> +#define TIF_FREEZE 19 /* is freezing for suspend */
>
> #define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
> #define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
> #define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
> #define _TIF_SINGLESTEP (1<<TIF_SINGLESTEP)
> #define _TIF_IRET (1<<TIF_IRET)
> #define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
> #define _TIF_RESTORE_SIGMASK (1<<TIF_RESTORE_SIGMASK)
> +#define _TIF_FREEZE (1<<TIF_FREEZE)
>
> #define _TIF_WORK_MASK 0x0000FFFE /* work to do on interrupt/exception return */
> #define _TIF_ALLWORK_MASK 0x0000FFFF /* work to do on any return to u-space */
>
> /*
> Index: linux-2.6.27-rc1-mm1/arch/parisc/include/asm/thread_info.h
> ===================================================================
> --- linux-2.6.27-rc1-mm1.orig/arch/parisc/include/asm/thread_info.h
> +++ linux-2.6.27-rc1-mm1/arch/parisc/include/asm/thread_info.h
> @@ -56,17 +56,19 @@ struct thread_info {
> #define TIF_NEED_RESCHED 2 /* rescheduling necessary */
> #define TIF_POLLING_NRFLAG 3 /* true if poll_idle() is polling TIF_NEED_RESCHED */
> #define TIF_32BIT 4 /* 32 bit binary */
> #define TIF_MEMDIE 5
> #define TIF_RESTORE_SIGMASK 6 /* restore saved signal mask */
> +#define TIF_FREEZE 19 /* is freezing for suspend */
>
> #define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
> #define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
> #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
> #define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG)
> #define _TIF_32BIT (1 << TIF_32BIT)
> #define _TIF_RESTORE_SIGMASK (1 << TIF_RESTORE_SIGMASK)
> +#define _TIF_FREEZE (1 << TIF_FREEZE)
>
> #define _TIF_USER_WORK_MASK (_TIF_SIGPENDING | \
> _TIF_NEED_RESCHED | _TIF_RESTORE_SIGMASK)
>
> #endif /* __KERNEL__ */
>



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