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From: Tim S. Woodall (twoodall_at_[hidden])
Date: 2005-12-06 10:33:32


Hello Gleb,

Gleb Natapov wrote:
> On Mon, Dec 05, 2005 at 10:23:14AM -0700, Galen M. Shipman wrote:
>
>>>Also there is a code commented out that enables memory hooks if
>>>leave_pinned is set. Why this code is disabled? Infiniband will
>>>not work correctly in such setup.
>>
>>There is still some debate about what will be the default behavior with
>>the leave_pinned option but we should have something in the trunk soon.
>>
>
> Can you explain to me what is the concern? Infiniband will not function
> properly otherwise (can be easely demonstrated).
>
Agred - we will make this the default on the release branch.

> Also memfree hooks decrease cache efficiency, the better solution would
> be to catch brk() system calls and remove memory from cache only then,
> but there is no way to do it for now.
>

We are look at other options, including catching brk/munmap system calls, and
will be experimenting w/ these on the trunk.

Thanks,
Tim