linux-kernel - Re: [PATCH v5 1/2] lib: stackdepot: Add support to configure STACK_HASH

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Date:   Mon, 18 Jan 2021 14:53:43 -0800
From:   Randy Dunlap <rdunlap@...radead.org>
To:     vjitta@...eaurora.org, minchan@...nel.org, glider@...gle.com,
        akpm@...ux-foundation.org, dan.j.williams@...el.com,
        broonie@...nel.org, mhiramat@...nel.org
Cc:     linux-kernel@...r.kernel.org, ylal@...eaurora.org,
        vinmenon@...eaurora.org, Vineet Gupta <vgupta@...opsys.com>,
        "linux-snps-arc@...ts.infradead.org" 
        <linux-snps-arc@...ts.infradead.org>
Subject: Re: [PATCH v5 1/2] lib: stackdepot: Add support to configure
 STACK_HASH_SIZE

On 1/18/21 1:56 AM, vjitta@...eaurora.org wrote:
> From: Yogesh Lal <ylal@...eaurora.org>
> 
> Use CONFIG_STACK_HASH_ORDER to configure STACK_HASH_SIZE.
> 
> Aim is to have configurable value for  STACK_HASH_SIZE,
> so depend on use case one can configure it.
> 
> One example is of Page Owner, default value of
> STACK_HASH_SIZE lead stack depot to consume 8MB of static memory.
> Making it configurable and use lower value helps to enable features like
> CONFIG_PAGE_OWNER without any significant overhead.
> 
> Signed-off-by: Yogesh Lal <ylal@...eaurora.org>
> Signed-off-by: Vinayak Menon <vinmenon@...eaurora.org>
> Signed-off-by: Vijayanand Jitta <vjitta@...eaurora.org>

Hi,

Did you see
https://lore.kernel.org/lkml/202101050729.cwTd47Yw-lkp@intel.com/

It seems that arch/arc/ does not have:
   arc-elf-ld: lib/stackdepot.o: in function `filter_irq_stacks':
   (.text+0x6): undefined reference to `__irqentry_text_start'
>> arc-elf-ld: (.text+0x6): undefined reference to `__irqentry_text_start'
>> arc-elf-ld: (.text+0x26): undefined reference to `__irqentry_text_end'
>> arc-elf-ld: (.text+0x26): undefined reference to `__irqentry_text_end'
>> arc-elf-ld: (.text+0x34): undefined reference to `__softirqentry_text_start'
>> arc-elf-ld: (.text+0x34): undefined reference to `__softirqentry_text_start'
>> arc-elf-ld: (.text+0x3c): undefined reference to `__softirqentry_text_end'
>> arc-elf-ld: (.text+0x3c): undefined reference to `__softirqentry_text_end'




-- 
~Randy
You can't do anything without having to do something else first.
-- Belefant's Law