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    SubjectRe: Debug: sleeping function called from invalid context
    On Mon, Aug 18, 2003 at 08:35:13PM -0700, Andrew Morton wrote:
    > "Randy.Dunlap" <rddunlap@osdl.org> wrote:
    > >
    > > Debug: sleeping function called with interrupts disabled at
    > > include/asm/uaccess.h:473
    >
    > OK, now my vague understanding of what's going on is that the app has
    > chosen to disable local interupts (via iopl()) and has taken a vm86 trap.

    Are you suggesting that whatever's calling sys_vm86 has disabled
    interrupts beforehand? I don't see why that's necessary at all. The
    vm86 fault handler is called via do_general_protection in any case and
    as such is in_interrupt() by definition. And a vm86 general protection
    fault can be caused by any of cli, sti, pushf, popf, intx, or iret. In
    fact, typical usage of vm86 mode is to setup a call to a 16-bit
    software interrupt handler and return via fault on the iret.

    I'm increasingly convinced it's actually broken.

    --
    Matt Mackall : http://www.selenic.com : of or relating to the moon
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