• Yasunori Goto's avatar
    [PATCH] memory hotplug: __GFP_NOWARN is better for __kmalloc_section_memmap() · f2d0aa5b
    Yasunori Goto authored
    Add __GFP_NOWARN flag to calling of __alloc_pages() in
    __kmalloc_section_memmap().  It can reduce noisy failure message.
    
    In ia64, section size is 1 GB, this means that order 8 pages are necessary
    for each section's memmap.  It is often very hard requirement under heavy
    memory pressure as you know.  So, __alloc_pages() gives up allocation and
    shows many noisy stack traces which means no page for each sections.
    (Current my environment shows 32 times of stack trace....)
    
    But, __kmalloc_section_memmap() calls vmalloc() after failure of it, and it
    can succeed allocation of memmap.  So, its stack trace warning becomes just
    noisy.  I suppose it shouldn't be shown.
    Signed-off-by: default avatarYasunori Goto <y-goto@jp.fujitsu.com>
    Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
    f2d0aa5b
sparse.c 7.19 KB