Awesome! Zhang Yanfei <zhangyanfei.yes at gmail.com> wrote: >/dev/oldmem provides the interface for us to access the "old memory" in >the dump-capture kernel. Unfortunately, no one actually uses this >interface. > >And this interface could actually cause some real problems if used on >ia64 >where the cached/uncached accesses are mixed. See the discussion from >the link: https://lkml.org/lkml/2013/4/12/386. > >So Eric suggested that we should remove /dev/oldmem as an unused piece >of >code. > >Besides, we used a global variable saved_max_pfn to let the capture >kernel >know the amount of memory that the previous kernel used. And for almost >all >architectures (except x86. In x86, saved_max_pfn is used by >detect_calgary()), >the only user of this variable is the read_oldmem interface of >/dev/oldmem, so >also remove the setting for saved_max_pfn in those architectures. > >Zhang Yanfei (7): > /dev/oldmem: Remove this interface > Documentation/devices.txt: Remove /dev/oldmem description > Documentation/kdump/kdump.txt: Remove /dev/oldmem description > mips: Remove savemaxmem parameter setup > powerpc: Remove savemaxmem parameter setup > ia64: Remove setting for saved_max_pfn > s390: Remove setting for saved_max_pfn > > Documentation/devices.txt | 2 - > Documentation/kdump/kdump.txt | 31 +++++-------------------- > arch/ia64/kernel/efi.c | 5 ---- > arch/mips/kernel/crash_dump.c | 10 -------- > arch/powerpc/kernel/crash_dump.c | 10 -------- > arch/s390/kernel/setup.c | 4 --- >drivers/char/mem.c | 47 >-------------------------------------- > 7 files changed, 6 insertions(+), 103 deletions(-) -- Sent from my mobile phone. Please excuse brevity and lack of formatting.
