On Thu, Dec 03, 2020 at 11:58:51AM +0800, Jiaxun Yang wrote: > > > 在 2020/12/3 上午11:19, Tiezhu Yang 写道: > > In the current code, CONFIG_ARCH_KEEP_MEMBLOCK is not set for MIPS arch, > > memblock_discard() will discard memory and reserved arrays if they were > > allocated, select ARCH_KEEP_MEMBLOCK to give a chance to track "memory" > > and "reserved" memblocks after early boot, with this patch, we can see > > the following two sysfs interfaces under DEBUG_FS. > > > > /sys/kernel/debug/memblock/memory > > /sys/kernel/debug/memblock/reserved > > Is this really necessary? > memblock data is not really necessary after boot for non-debug purpose. > > Given that MIPS is widely used in embedded systems which doesn't have much > memory, keeping unused data after boot is kinda unconvincing.
about how much memory are talking here ? > > If you intend to debug that please do it locally. maybe we can add a if DEBUG_KERNEL since enabling DEBUG_KERNEL will cost already some memory... Thomas. -- Crap can work. Given enough thrust pigs will fly, but it's not necessarily a good idea. [ RFC1925, 2.3 ]
