* [PATCH v2] MIPS: Select ARCH_KEEP_MEMBLOCK if DEBUG_KERNEL to enable sysfs memblock debug
@ 2020-12-07 12:21 Tiezhu Yang
2020-12-14 15:19 ` Thomas Bogendoerfer
0 siblings, 1 reply; 2+ messages in thread
From: Tiezhu Yang @ 2020-12-07 12:21 UTC (permalink / raw)
To: Thomas Bogendoerfer; +Cc: linux-mips, linux-kernel, Xuefeng Li
In the current code, CONFIG_ARCH_KEEP_MEMBLOCK is not set for MIPS arch,
memblock_discard() will discard memory and reserved arrays if they were
allocated, select ARCH_KEEP_MEMBLOCK if DEBUG_KERNEL to give a chance to
track "memory" and "reserved" memblocks after early boot, with this patch,
we can see the following two sysfs interfaces under DEBUG_FS.
/sys/kernel/debug/memblock/memory
/sys/kernel/debug/memblock/reserved
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
---
v2:
- select ARCH_KEEP_MEMBLOCK only if DEBUG_KERNEL
arch/mips/Kconfig | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index b49a390..85c7b06 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -10,6 +10,7 @@ config MIPS
select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
select ARCH_HAS_UBSAN_SANITIZE_ALL
select ARCH_HAS_GCOV_PROFILE_ALL
+ select ARCH_KEEP_MEMBLOCK if DEBUG_KERNEL
select ARCH_SUPPORTS_UPROBES
select ARCH_USE_BUILTIN_BSWAP
select ARCH_USE_CMPXCHG_LOCKREF if 64BIT
--
2.1.0
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH v2] MIPS: Select ARCH_KEEP_MEMBLOCK if DEBUG_KERNEL to enable sysfs memblock debug
2020-12-07 12:21 [PATCH v2] MIPS: Select ARCH_KEEP_MEMBLOCK if DEBUG_KERNEL to enable sysfs memblock debug Tiezhu Yang
@ 2020-12-14 15:19 ` Thomas Bogendoerfer
0 siblings, 0 replies; 2+ messages in thread
From: Thomas Bogendoerfer @ 2020-12-14 15:19 UTC (permalink / raw)
To: Tiezhu Yang; +Cc: linux-mips, linux-kernel, Xuefeng Li
On Mon, Dec 07, 2020 at 08:21:42PM +0800, Tiezhu Yang wrote:
> In the current code, CONFIG_ARCH_KEEP_MEMBLOCK is not set for MIPS arch,
> memblock_discard() will discard memory and reserved arrays if they were
> allocated, select ARCH_KEEP_MEMBLOCK if DEBUG_KERNEL to give a chance to
> track "memory" and "reserved" memblocks after early boot, with this patch,
> we can see the following two sysfs interfaces under DEBUG_FS.
>
> /sys/kernel/debug/memblock/memory
> /sys/kernel/debug/memblock/reserved
>
> Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
> ---
>
> v2:
> - select ARCH_KEEP_MEMBLOCK only if DEBUG_KERNEL
>
> arch/mips/Kconfig | 1 +
> 1 file changed, 1 insertion(+)
applied to mips-next.
Thomas.
--
Crap can work. Given enough thrust pigs will fly, but it's not necessarily a
good idea. [ RFC1925, 2.3 ]
^ permalink raw reply [flat|nested] 2+ messages in thread
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2020-12-07 12:21 [PATCH v2] MIPS: Select ARCH_KEEP_MEMBLOCK if DEBUG_KERNEL to enable sysfs memblock debug Tiezhu Yang
2020-12-14 15:19 ` Thomas Bogendoerfer
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