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Subject: Re: [PATCH v3] kasan: add memory corruption identification for
 software tag-based mode
To:     Walter Wu <walter-zh.wu@mediatek.com>
Cc:     Dmitry Vyukov <dvyukov@google.com>,
        Alexander Potapenko <glider@google.com>,
        Christoph Lameter <cl@linux.com>,
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        Andrey Konovalov <andreyknvl@google.com>,
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From:   Andrey Ryabinin <aryabinin@virtuozzo.com>
Message-ID: <71df2bd5-7bc8-2c82-ee31-3f68c3b6296d@virtuozzo.com>
Date:   Fri, 26 Jul 2019 15:52:10 +0300
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On 7/26/19 3:28 PM, Walter Wu wrote:
> On Fri, 2019-07-26 at 15:00 +0300, Andrey Ryabinin wrote:
>>
>
>>>
>>>
>>> I remember that there are already the lists which you concern. Maybe we
>>> can try to solve those problems one by one.
>>>
>>> 1. deadlock issue? cause by kmalloc() after kfree()?
>>
>> smp_call_on_cpu()
> 
>>> 2. decrease allocation fail, to modify GFP_NOWAIT flag to GFP_KERNEL?
>>
>> No, this is not gonna work. Ideally we shouldn't have any allocations there.
>> It's not reliable and it hurts performance.
>>
> I dont know this meaning, we need create a qobject and put into
> quarantine, so may need to call kmem_cache_alloc(), would you agree this
> action?
> 

How is this any different from what you have now?