Re: [PATCH v6 6/7] mm: Defer TLB flush by keeping both src and dst folios at migration

From: kernel test robot
Date: Mon Jan 15 2024 - 18:50:53 EST

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In reply to: Byungchul Park: "[PATCH v6 6/7] mm: Defer TLB flush by keeping both src and dst folios at migration"
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Hi Byungchul,

kernel test robot noticed the following build warnings:

[auto build test WARNING on 0dd3ee31125508cd67f7e7172247f05b7fd1753a]

url: https://github.com/intel-lab-lkp/linux/commits/Byungchul-Park/x86-tlb-Add-APIs-manipulating-tlb-batch-s-arch-data/20240115-162220
base: 0dd3ee31125508cd67f7e7172247f05b7fd1753a
patch link: https://lore.kernel.org/r/20240115081953.2521-7-byungchul%40sk.com
patch subject: [PATCH v6 6/7] mm: Defer TLB flush by keeping both src and dst folios at migration
config: alpha-allnoconfig (https://download.01.org/0day-ci/archive/20240116/202401160753.u2pxHstH-lkp@xxxxxxxxx/config)
compiler: alpha-linux-gcc (GCC) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240116/202401160753.u2pxHstH-lkp@xxxxxxxxx/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202401160753.u2pxHstH-lkp@xxxxxxxxx/

All warnings (new ones prefixed by >>):

In file included from include/linux/pid_namespace.h:7,
from include/linux/ptrace.h:10,
from arch/alpha/kernel/asm-offsets.c:11:
>> include/linux/mm.h:2046:43: warning: 'struct arch_tlbflush_unmap_batch' declared inside parameter list will not be visible outside of this definition or declaration
2046 | static inline void migrc_flush_end(struct arch_tlbflush_unmap_batch *arch) {}
| ^~~~~~~~~~~~~~~~~~~~~~~~~
arch/alpha/kernel/asm-offsets.c:15:6: warning: no previous prototype for 'foo' [-Wmissing-prototypes]
15 | void foo(void)
| ^~~
--
In file included from arch/alpha/kernel/traps.c:13:
>> include/linux/mm.h:2046:43: warning: 'struct arch_tlbflush_unmap_batch' declared inside parameter list will not be visible outside of this definition or declaration
2046 | static inline void migrc_flush_end(struct arch_tlbflush_unmap_batch *arch) {}
| ^~~~~~~~~~~~~~~~~~~~~~~~~
arch/alpha/kernel/traps.c:210:1: warning: no previous prototype for 'do_entArith' [-Wmissing-prototypes]
210 | do_entArith(unsigned long summary, unsigned long write_mask,
| ^~~~~~~~~~~
arch/alpha/kernel/traps.c:232:1: warning: no previous prototype for 'do_entIF' [-Wmissing-prototypes]
232 | do_entIF(unsigned long type, struct pt_regs *regs)
| ^~~~~~~~
arch/alpha/kernel/traps.c:399:1: warning: no previous prototype for 'do_entDbg' [-Wmissing-prototypes]
399 | do_entDbg(struct pt_regs *regs)
| ^~~~~~~~~
arch/alpha/kernel/traps.c:435:1: warning: no previous prototype for 'do_entUna' [-Wmissing-prototypes]
435 | do_entUna(void * va, unsigned long opcode, unsigned long reg,
| ^~~~~~~~~
arch/alpha/kernel/traps.c:720:1: warning: no previous prototype for 'do_entUnaUser' [-Wmissing-prototypes]
720 | do_entUnaUser(void __user * va, unsigned long opcode,
| ^~~~~~~~~~~~~
arch/alpha/kernel/traps.c:975:1: warning: no previous prototype for 'trap_init' [-Wmissing-prototypes]
975 | trap_init(void)
| ^~~~~~~~~
--
In file included from arch/alpha/kernel/process.c:20:
>> include/linux/mm.h:2046:43: warning: 'struct arch_tlbflush_unmap_batch' declared inside parameter list will not be visible outside of this definition or declaration
2046 | static inline void migrc_flush_end(struct arch_tlbflush_unmap_batch *arch) {}
| ^~~~~~~~~~~~~~~~~~~~~~~~~
--
In file included from arch/alpha/include/asm/io.h:8,
from include/linux/io.h:13,
from include/linux/irq.h:20,
from include/asm-generic/hardirq.h:17,
from arch/alpha/include/asm/hardirq.h:8,
from include/linux/hardirq.h:11,
from include/linux/interrupt.h:11,
from include/linux/kernel_stat.h:9,
from arch/alpha/kernel/irq.c:17:
>> include/linux/mm.h:2046:43: warning: 'struct arch_tlbflush_unmap_batch' declared inside parameter list will not be visible outside of this definition or declaration
2046 | static inline void migrc_flush_end(struct arch_tlbflush_unmap_batch *arch) {}
| ^~~~~~~~~~~~~~~~~~~~~~~~~
arch/alpha/kernel/irq.c:96:1: warning: no previous prototype for 'handle_irq' [-Wmissing-prototypes]
96 | handle_irq(int irq)
| ^~~~~~~~~~
--
In file included from arch/alpha/include/asm/io.h:8,
from include/linux/io.h:13,
from include/linux/irq.h:20,
from arch/alpha/kernel/irq_alpha.c:8:
>> include/linux/mm.h:2046:43: warning: 'struct arch_tlbflush_unmap_batch' declared inside parameter list will not be visible outside of this definition or declaration
2046 | static inline void migrc_flush_end(struct arch_tlbflush_unmap_batch *arch) {}
| ^~~~~~~~~~~~~~~~~~~~~~~~~
arch/alpha/kernel/irq_alpha.c:45:1: warning: no previous prototype for 'do_entInt' [-Wmissing-prototypes]
45 | do_entInt(unsigned long type, unsigned long vector,
| ^~~~~~~~~
--
In file included from include/linux/pid_namespace.h:7,
from include/linux/ptrace.h:10,
from arch/alpha/kernel/signal.c:16:
>> include/linux/mm.h:2046:43: warning: 'struct arch_tlbflush_unmap_batch' declared inside parameter list will not be visible outside of this definition or declaration
2046 | static inline void migrc_flush_end(struct arch_tlbflush_unmap_batch *arch) {}
| ^~~~~~~~~~~~~~~~~~~~~~~~~
arch/alpha/kernel/signal.c:205:1: warning: no previous prototype for 'do_sigreturn' [-Wmissing-prototypes]
205 | do_sigreturn(struct sigcontext __user *sc)
| ^~~~~~~~~~~~
arch/alpha/kernel/signal.c:233:1: warning: no previous prototype for 'do_rt_sigreturn' [-Wmissing-prototypes]
233 | do_rt_sigreturn(struct rt_sigframe __user *frame)
| ^~~~~~~~~~~~~~~
arch/alpha/kernel/signal.c:523:1: warning: no previous prototype for 'do_work_pending' [-Wmissing-prototypes]
523 | do_work_pending(struct pt_regs *regs, unsigned long thread_flags,
| ^~~~~~~~~~~~~~~
--
In file included from arch/alpha/kernel/ptrace.c:11:
>> include/linux/mm.h:2046:43: warning: 'struct arch_tlbflush_unmap_batch' declared inside parameter list will not be visible outside of this definition or declaration
2046 | static inline void migrc_flush_end(struct arch_tlbflush_unmap_batch *arch) {}
| ^~~~~~~~~~~~~~~~~~~~~~~~~
arch/alpha/kernel/ptrace.c:322:26: warning: no previous prototype for 'syscall_trace_enter' [-Wmissing-prototypes]
322 | asmlinkage unsigned long syscall_trace_enter(void)
| ^~~~~~~~~~~~~~~~~~~
arch/alpha/kernel/ptrace.c:334:1: warning: no previous prototype for 'syscall_trace_leave' [-Wmissing-prototypes]
334 | syscall_trace_leave(void)
| ^~~~~~~~~~~~~~~~~~~
--
In file included from arch/alpha/kernel/time.c:28:
>> include/linux/mm.h:2046:43: warning: 'struct arch_tlbflush_unmap_batch' declared inside parameter list will not be visible outside of this definition or declaration
2046 | static inline void migrc_flush_end(struct arch_tlbflush_unmap_batch *arch) {}
| ^~~~~~~~~~~~~~~~~~~~~~~~~
arch/alpha/kernel/time.c:64:6: warning: no previous prototype for 'arch_irq_work_raise' [-Wmissing-prototypes]
64 | void arch_irq_work_raise(void)
| ^~~~~~~~~~~~~~~~~~~
--
In file included from arch/alpha/include/asm/io.h:8,
from arch/alpha/kernel/io.c:10:
>> include/linux/mm.h:2046:43: warning: 'struct arch_tlbflush_unmap_batch' declared inside parameter list will not be visible outside of this definition or declaration
2046 | static inline void migrc_flush_end(struct arch_tlbflush_unmap_batch *arch) {}
| ^~~~~~~~~~~~~~~~~~~~~~~~~
arch/alpha/kernel/io.c:654:1: warning: no previous prototype for 'scr_memcpyw' [-Wmissing-prototypes]
654 | scr_memcpyw(u16 *d, const u16 *s, unsigned int count)
| ^~~~~~~~~~~
--
In file included from arch/alpha/include/asm/io.h:8,
from include/linux/io.h:13,
from include/linux/irq.h:20,
from include/asm-generic/hardirq.h:17,
from arch/alpha/include/asm/hardirq.h:8,
from include/linux/hardirq.h:11,
from include/linux/interrupt.h:11,
from include/linux/pci.h:38,
from arch/alpha/kernel/pci.c:17:
>> include/linux/mm.h:2046:43: warning: 'struct arch_tlbflush_unmap_batch' declared inside parameter list will not be visible outside of this definition or declaration
2046 | static inline void migrc_flush_end(struct arch_tlbflush_unmap_batch *arch) {}
| ^~~~~~~~~~~~~~~~~~~~~~~~~
arch/alpha/kernel/pci.c:285:1: warning: no previous prototype for 'pcibios_claim_one_bus' [-Wmissing-prototypes]
285 | pcibios_claim_one_bus(struct pci_bus *b)
| ^~~~~~~~~~~~~~~~~~~~~
--
In file included from arch/alpha/include/asm/io.h:8,
from arch/alpha/kernel/core_cia.c:16:
>> include/linux/mm.h:2046:43: warning: 'struct arch_tlbflush_unmap_batch' declared inside parameter list will not be visible outside of this definition or declaration
2046 | static inline void migrc_flush_end(struct arch_tlbflush_unmap_batch *arch) {}
| ^~~~~~~~~~~~~~~~~~~~~~~~~
arch/alpha/kernel/core_cia.c:284:1: warning: no previous prototype for 'cia_pci_tbi_try2' [-Wmissing-prototypes]
284 | cia_pci_tbi_try2(struct pci_controller *hose,
| ^~~~~~~~~~~~~~~~
arch/alpha/kernel/core_cia.c:580:1: warning: no previous prototype for 'cia_save_srm_settings' [-Wmissing-prototypes]
580 | cia_save_srm_settings(int is_pyxis)
| ^~~~~~~~~~~~~~~~~~~~~
arch/alpha/kernel/core_cia.c:606:1: warning: no previous prototype for 'cia_restore_srm_settings' [-Wmissing-prototypes]
606 | cia_restore_srm_settings(void)
| ^~~~~~~~~~~~~~~~~~~~~~~~
.

vim +2046 include/linux/mm.h

2040
2041 #if defined(CONFIG_MIGRATION) && defined(CONFIG_ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH)
2042 extern void migrc_flush_start(void);
2043 extern void migrc_flush_end(struct arch_tlbflush_unmap_batch *arch);
2044 #else
2045 static inline void migrc_flush_start(void) {}
> 2046 static inline void migrc_flush_end(struct arch_tlbflush_unmap_batch *arch) {}
2047 #endif
2048

--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki

Next message: Edward Adam Davis: "Re: [syzbot] [btrfs?] KASAN: slab-out-of-bounds Read in getname_kernel (2)"
Previous message: Google: "Re: [PATCH v11 2/5] ring-buffer: Introducing ring-buffer mapping functions"
In reply to: Byungchul Park: "[PATCH v6 6/7] mm: Defer TLB flush by keeping both src and dst folios at migration"
Next in thread: kernel test robot: "Re: [PATCH v6 6/7] mm: Defer TLB flush by keeping both src and dst folios at migration"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]