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Groups > linux.kernel > #1220096

Re: [PATCH] ARM: fix bug which lowmem size is limited to 760MB

From Arnd Bergmann <arnd@arndb.de>
Newsgroups linux.kernel
Subject Re: [PATCH] ARM: fix bug which lowmem size is limited to 760MB
Date 2015-09-07 13:50 +0200
Message-ID <q635U-4u5-29@gated-at.bofh.it> (permalink)
References <q4yQy-7Gl-29@gated-at.bofh.it> <q4A5X-YQ-11@gated-at.bofh.it> <q4NZf-3Zz-11@gated-at.bofh.it>
Organization linux.* mail to news gateway

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On Thursday 03 September 2015 21:24:00 Nicolas Pitre wrote:
> If 768MB targets were common place then it could be worth changing the 
> default vmalloc size to accommodate this memory size and testing all the 
> other targets to make sure no regressions are introduced.  But given it 
> is easy to change the default via the kernel cmdline, and that you lose 
> only 8 MB otherwise, I don't think it is worth the trouble and/or the 
> risk.

Agreed.

Given how much more common 1GB hardware configurations are compared to 768MB
configuration, we could however think about adding a VMSPLIT_3G_OPT option
that x86 has (also VMSPLIT_2_75G on ARCH_TILE), to allow using the entire
1GB of lowmem without going all the way to VMSPLIT_2G. That option would
also let us use the entire 768MB on the machines that 	Yongtaek Lee is
interested in.

	Arnd
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Thread

[PATCH] ARM: fix bug which VMALLOC_START is lowwer than 0xf0000000 Yongtaek Lee <ytk.lee@samsung.com> - 2015-09-03 04:30 +0200
  [PATCH] ARM: fix bug which lowmem size is limited to 760MB Yongtaek Lee <ytk.lee@samsung.com> - 2015-09-03 07:20 +0200
  Re: [PATCH] ARM: fix bug which VMALLOC_START is lowwer than  0xf0000000 Russell King - ARM Linux <linux@arm.linux.org.uk> - 2015-09-03 10:10 +0200
    Re: Re: [PATCH] ARM: fix bug which VMALLOC_START is lowwer than  0xf0000000 Yongtaek Lee <ytk.lee@samsung.com> - 2015-09-03 10:30 +0200
      Re: Re: [PATCH] ARM: fix bug which VMALLOC_START is lowwer than  0xf0000000 Lucas Stach <l.stach@pengutronix.de> - 2015-09-03 10:40 +0200
        Re: Re: Re: [PATCH] ARM: fix bug which VMALLOC_START is lowwer than  0xf0000000 Yongtaek Lee <ytk.lee@samsung.com> - 2015-09-03 10:50 +0200
          Re: Re: Re: [PATCH] ARM: fix bug which VMALLOC_START is lowwer than  0xf0000000 Russell King - ARM Linux <linux@arm.linux.org.uk> - 2015-09-03 11:20 +0200
            [PATCH] ARM: fix bug which lowmem size is limited to 760MB Yongtaek Lee <ytk.lee@samsung.com> - 2015-09-03 12:40 +0200
              Re: [PATCH] ARM: fix bug which lowmem size is limited to 760MB Nicolas Pitre <nicolas.pitre@linaro.org> - 2015-09-04 03:30 +0200
                Re: [PATCH] ARM: fix bug which lowmem size is limited to 760MB Arnd Bergmann <arnd@arndb.de> - 2015-09-07 13:50 +0200
                Re: [PATCH] ARM: fix bug which lowmem size is limited to 760MB Nicolas Pitre <nicolas.pitre@linaro.org> - 2015-09-07 17:40 +0200
                Re: [PATCH] ARM: fix bug which lowmem size is limited to 760MB Nicolas Pitre <nicolas.pitre@linaro.org> - 2015-09-07 17:50 +0200
                Re: [PATCH] ARM: fix bug which lowmem size is limited to 760MB Arnd Bergmann <arnd@arndb.de> - 2015-09-07 17:50 +0200
                Re: [PATCH] ARM: fix bug which lowmem size is limited to 760MB Nicolas Pitre <nicolas.pitre@linaro.org> - 2015-09-07 21:50 +0200
                Re: [PATCH] ARM: fix bug which lowmem size is limited to 760MB Russell King - ARM Linux <linux@arm.linux.org.uk> - 2015-09-08 02:20 +0200
                Re: [PATCH] ARM: fix bug which lowmem size is limited to 760MB Nicolas Pitre <nicolas.pitre@linaro.org> - 2015-09-08 04:10 +0200
                Re: [PATCH] ARM: fix bug which lowmem size is limited to 760MB Russell King - ARM Linux <linux@arm.linux.org.uk> - 2015-09-08 10:10 +0200
                Re: [PATCH] ARM: fix bug which lowmem size is limited to 760MB Nicolas Pitre <nicolas.pitre@linaro.org> - 2015-09-08 17:00 +0200
        Re: Re: [PATCH] ARM: fix bug which VMALLOC_START is lowwer than  0xf0000000 Russell King - ARM Linux <linux@arm.linux.org.uk> - 2015-09-03 11:10 +0200

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