Messages in this thread |  | | Date | Wed, 28 Nov 2001 12:18:08 +0000 (GMT) | From | Tigran Aivazian <> | Subject | Re: task_struct.mm == NULL |
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Hi Frank,
It can be NULL for kernel threads which do not have a user address space. Nevertheless, their tsk->active_mm would not be NULL but point to some process' address space.
The point of having active_mm is to minimize TLB flushes on switching address spaces when the task is scheduled out.
Regards, Tigran
On Wed, 28 Nov 2001, Frank Cornelis wrote:
> Hey, > > I found in some code checks for task_struct.mm being NULL. > When can task_struct.mm of a process be NULL except right before the > process-kill? > > Frank. > > - > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ >
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