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    [PATCH] fault-injection capability for alloc_pages() · 933e312e
    Akinobu Mita 提交于
    This patch provides fault-injection capability for alloc_pages()
    
    Boot option:
    
    fail_page_alloc=<interval>,<probability>,<space>,<times>
    
    	<interval> -- specifies the interval of failures.
    
    	<probability> -- specifies how often it should fail in percent.
    
    	<space> -- specifies the size of free space where memory can be
    		   allocated safely in pages.
    
    	<times> -- specifies how many times failures may happen at most.
    
    Debugfs:
    
    /debug/fail_page_alloc/interval
    /debug/fail_page_alloc/probability
    /debug/fail_page_alloc/specifies
    /debug/fail_page_alloc/times
    /debug/fail_page_alloc/ignore-gfp-highmem
    /debug/fail_page_alloc/ignore-gfp-wait
    
    Example:
    
    	fail_page_alloc=10,100,0,-1
    
    The page allocation (alloc_pages(), ...) fails once per 10 times.
    Signed-off-by: NAkinobu Mita <akinobu.mita@gmail.com>
    Signed-off-by: NAndrew Morton <akpm@osdl.org>
    Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
    933e312e
Kconfig.debug 14.9 KB