• Helge Deller's avatar
    parisc,metag: Do not hardcode maximum userspace stack size · 042d27ac
    Helge Deller authored
    This patch affects only architectures where the stack grows upwards
    (currently parisc and metag only). On those do not hardcode the maximum
    initial stack size to 1GB for 32-bit processes, but make it configurable
    via a config option.
    
    The main problem with the hardcoded stack size is, that we have two
    memory regions which grow upwards: stack and heap. To keep most of the
    memory available for heap in a flexmap memory layout, it makes no sense
    to hard allocate up to 1GB of the memory for stack which can't be used
    as heap then.
    
    This patch makes the stack size for 32-bit processes configurable and
    uses 80MB as default value which has been in use during the last few
    years on parisc and which hasn't showed any problems yet.
    Signed-off-by: default avatarHelge Deller <deller@gmx.de>
    Signed-off-by: default avatarJames Hogan <james.hogan@imgtec.com>
    Cc: "James E.J. Bottomley" <jejb@parisc-linux.org>
    Cc: linux-parisc@vger.kernel.org
    Cc: linux-metag@vger.kernel.org
    Cc: John David Anglin <dave.anglin@bell.net>
    042d27ac
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