ATA identify retries exceeded - kernel panic

Wed Nov 29 14:29:52 PST 2006

Matthew Dillon wrote:
    I agree that we should make M_ZERO semantics work more as expected...
    or at least panic() if they aren't allowed.
yes, i agree.

    Since bzero is a procedure call, perhaps the solution here is to add
    another function pointer for 'zeroing' a structure when M_ZERO is
    specified.  This function would be specified in objcache_create() and
    default to a bzero if NULL.  This way M_ZERO will work as expected with
    simple objcache setups, and panic the system if someone tries to use
    it with more complex objcache setups (like mbufs).
I don't agree.  let's not make it more complex than it should be.  how about:  if there is no ctor you can specify M_ZERO.  if you specify a ctor, M_ZERO is a reason to panic.

cheers
 simon
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