On 6/4/06, M. Warner Losh <[EMAIL PROTECTED]> wrote:
In message: <[EMAIL PROTECTED]>
: > > > Warner
: Prior to removing a card from the system, two things must occur:
:
: The device's driver must cease accessing the card.
:
: The card must cease generation transaction and interrupts.
:
: How this is accomplished is OS-specific, but the following must take place:
:
: The OS must stop issuing new requests to the device's driver or must
: instruct the driver to stop accepting new requests.
:
: The driver must terminate or complete all outstanding requests.
:
: The card must be disabled from generating interrupts or transactions.
:
: When the OS commands the driver to quiesce itself and its device, the
: OS must not expect the device to remain in the system (in other words,
: it could be removed and not replaced with a similar card).
:
: How to design and implement quiescing in freebsd?
device_quiesce? I have it in a p4 tree right now. Specifically, it
hooks up to the MOD_UNLOAD with a QUIESCE flag. The driver's
device_quiesce routine gets called, the driver sleeps there until it
knows that it is good, then returns to the caller. Then the driver's
detach routine can be called.
Warner
where can i get the p4 tree read ,sir
--
we who r about to die,salute u!
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