From mboxrd@z Thu Jan 1 00:00:00 1970 From: arnd@arndb.de (Arnd Bergmann) Date: Mon, 07 Sep 2015 13:41:33 +0200 Subject: [PATCH] ARM: fix bug which lowmem size is limited to 760MB In-Reply-To: References: <20150903091044.GW21084@n2100.arm.linux.org.uk> <1441276233-14566-1-git-send-email-ytk.lee@samsung.com> Message-ID: <1713935.2YV1sNJUyb@wuerfel> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 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