Hi Add more log: <4>[ 0.000000] INITRD unalign phys address:0x02000000+0x0022fb0e <4>[ 0.000000] INITRD aligned phys address:0x02000000+0x00230000 <4>[ 0.574868] free_initrd: free initrd 0xc2000000+0xc222fb0e <4>[ 0.579398] free_initrd_mem: free pfn:8192---8752 The inird used memory is still the same as the one passed by bootloads, I don't change it. It should be safe. -----Original Message----- From: Russell King - ARM Linux [mailto:linux@xxxxxxxxxxxxxxxx] Sent: Monday, September 15, 2014 5:30 PM To: Wang, Yalin Cc: 'Will Deacon'; 'linux-kernel@xxxxxxxxxxxxxxx'; 'linux-arm-kernel@xxxxxxxxxxxxxxxxxxx'; 'linux-mm@xxxxxxxxx'; linux-arm-msm@xxxxxxxxxxxxxxx Subject: Re: [RFC] arm:extend the reserved mrmory for initrd to be page aligned On Mon, Sep 15, 2014 at 05:07:53PM +0800, Wang, Yalin wrote: > Hi > > I tested it on my phone, > >From log: > <4>[ 0.000000] INITRD unalign phys address:0x02000000+0x0022fb0e > <4>[ 0.000000] INITRD aligned phys address:0x02000000+0x00230000 > > <4>[ 0.579474] free_initrd_mem: free pfn:8192---8752 > > The tail address is not aligned for most initrd image, This page will > not be freed and lost . Right, so from this I can assume that you only tested it by seeing what the addresses were, and the values used in free_initrd_mem(). What you haven't tested is whether the initrd actually gets used with your changes, which is more what I was interested in given what I found when reading your patch. -- FTTC broadband for 0.8mile line: currently at 9.5Mbps down 400kbps up according to speedtest.net. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href