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    SubjectRe: [PATCH] x86-32: remove CONFIG_4KSTACKS
    On Wed, Jun 16, 2010 at 11:21:36AM +0100, Alan Cox wrote:
    > On Wed, 16 Jun 2010 11:16:21 +0200
    > Christoph Hellwig <hch@lst.de> wrote:
    >
    > > These days 4 kilobytes of stack just aren't enough for reliably operation,
    > > and people using lots of threads have long switched to x86-64, so remove the
    > > CONFIG_4KSTACKS option.
    >
    > It's very useful for things like debugging and because of the split
    > kernel/irq stacks.

    Ingo just ACKed my previous patch to make irq stacks unconditional.

    > It also seems to be quite adequate for most
    > configurations.

    See the direct reclaim flamewar. Currently we can end up in ->writepage
    from af_unix poll code with over 3k stack alreay used. It's certainly
    not anywhere near enough.

    > Perhaps XFS should select 8K stack instead ?

    or rather !CONFIG_INSANE. I don't care too much. No one sane should
    ever enable it anymore, but Ingo asked me to send a patch to remove it.


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