Re: [PATCH] kvmalloc: always use vmalloc if CONFIG_DEBUG_VM

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To: Eric Dumazet <eric.dumazet@xxxxxxxxx>
Subject: Re: [PATCH] kvmalloc: always use vmalloc if CONFIG_DEBUG_VM
From: Mikulas Patocka <mpatocka@xxxxxxxxxx>
Date: Thu, 19 Apr 2018 12:28:41 -0400 (EDT)
Cc: David Miller <davem@xxxxxxxxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, linux-mm@xxxxxxxxx, edumazet@xxxxxxxxxx, bhutchings@xxxxxxxxxxxxxx, netdev@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, mst@xxxxxxxxxx, jasowang@xxxxxxxxxx, virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx, dm-devel@xxxxxxxxxx, Vlastimil Babka <vbabka@xxxxxxx>
In-reply-to: <6260a8af-3166-94d3-9441-104d342ab7a1@gmail.com>
References: <alpine.LRH.2.02.1804181029270.19294@file01.intranet.prod.int.rdu2.redhat.com> <3e65977e-53cd-bf09-bc4b-0ce40e9091fe@gmail.com> <alpine.LRH.2.02.1804181218270.19136@file01.intranet.prod.int.rdu2.redhat.com> <20180418.134651.2225112489265654270.davem@davemloft.net> <alpine.LRH.2.02.1804181350050.17942@file01.intranet.prod.int.rdu2.redhat.com> <alpine.LRH.2.02.1804191207380.31175@file01.intranet.prod.int.rdu2.redhat.com> <6260a8af-3166-94d3-9441-104d342ab7a1@gmail.com>
User-agent: Alpine 2.02 (LRH 1266 2009-07-14)


On Thu, 19 Apr 2018, Eric Dumazet wrote:

> 
> 
> On 04/19/2018 09:12 AM, Mikulas Patocka wrote:
> > 
> > 
> > These bugs are hard to reproduce because vmalloc falls back to kmalloc
> > only if memory is fragmented.
> > 
> 
> This sentence is wrong.
> 
> .... because kvmalloc() falls back to vmalloc() ...

Yes. There should be "falls back to vmalloc()".

Mikulas

References:
- [PATCH] kvmalloc: always use vmalloc if CONFIG_DEBUG_VM
  - From: Mikulas Patocka
- Re: [PATCH] kvmalloc: always use vmalloc if CONFIG_DEBUG_VM
  - From: Eric Dumazet

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