linux-kernel - CONFIG_ENABLE_VMALLOC

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Message-ID: <35FD53F367049845BC99AC72306C23D103B42F948AAD@CNBJMBX05.corpusers.net>
Date:	Tue, 19 Aug 2014 15:22:43 +0800
From:	"Wang, Yalin" <Yalin.Wang@...ymobile.com>
To:	"'linux-arm-kernel@...ts.infradead.org'" 
	<linux-arm-kernel@...ts.infradead.org>,
	'Will Deacon' <will.deacon@....com>,
	"'linux-kernel@...r.kernel.org'" <linux-kernel@...r.kernel.org>
Subject: CONFIG_ENABLE_VMALLOC_SAVING  problem

Hi 

I found when I enable CONFIG_ENABLE_VMALLOC_SAVING on ARM arch,
Vmalloc still only use VMALLOC_START --  VMALLOC_END virtual address,
It don't use the memory hole address,
Only  function call  get_vm_area_caller  like ioremap can use
These memory hole address .

Why not change vmalloc also use this address?

Another problem is that when I cat /proc/meminfo ,
The VmallocTotal item  show  doesn't include memory hole address,
It only show VMALLOC_START --  VMALLOC_END  ,
I think it is not correct here , should add memory hole as vmalloc when 
CONFIG_ENABLE_VMALLOC_SAVING  is enabled , isn't it ?

Thanks

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