• Eric Dumazet's avatar
    get rid of NR_OPEN and introduce a sysctl_nr_open · 9cfe015a
    Eric Dumazet authored
    
    
    NR_OPEN (historically set to 1024*1024) actually forbids processes to open
    more than 1024*1024 handles.
    
    Unfortunatly some production servers hit the not so 'ridiculously high
    value' of 1024*1024 file descriptors per process.
    
    Changing NR_OPEN is not considered safe because of vmalloc space potential
    exhaust.
    
    This patch introduces a new sysctl (/proc/sys/fs/nr_open) wich defaults to
    1024*1024, so that admins can decide to change this limit if their workload
    needs it.
    
    [akpm@linux-foundation.org: export it for sparc64]
    Signed-off-by: default avatarEric Dumazet <dada1@cosmosbay.com>
    Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
    Cc: Richard Henderson <rth@twiddle.net>
    Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
    Cc: "David S. Miller" <davem@davemloft.net>
    Cc: Ralf Baechle <ralf@linux-mips.org>
    Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
    9cfe015a
osf_sys.c 31.6 KB