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From:   Vineet Gupta <vineet.gupta1@synopsys.com>
To:     Michal Hocko <mhocko@kernel.org>
CC:     "linux-snps-arc@lists.infradead.org" 
        <linux-snps-arc@lists.infradead.org>,
        "linux-mm@kvack.org" <linux-mm@kvack.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "linux-arch@vger.kernel.org" <linux-arch@vger.kernel.org>,
        Peter Zijlstra <peterz@infradead.org>
Subject: Re: [PATCH 1/2] ARC: show_regs: avoid page allocator
Thread-Topic: [PATCH 1/2] ARC: show_regs: avoid page allocator
Thread-Index: AQHUlwMR8PfsxZ55lUuwqgC40oqmmA==
Date:   Thu, 20 Dec 2018 18:38:26 +0000
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On 12/20/18 4:57 AM, Michal Hocko wrote:=0A=
>> Despite this, lockdep still barfs (see next change), but this patch=0A=
>> still has merit as in we use smaller/localized buffers now and there's=
=0A=
>> less instructoh trace to sift thru when debugging pesky issues.=0A=
> But show_regs is called from contexts which might be called from deep=0A=
> call chains (e.g WARN). Is it safe to allocate such a large stack there?=
=0A=
=0A=
ARC has 8K pages and 256 additional bytes of stack usage doesn't seem absur=
dly=0A=
high to me !=0A=
=0A=
-Vineet=0A=