On 7/2/07, Michael S. Tsirkin <[EMAIL PROTECTED]> wrote:
> Quoting Or Gerlitz <[EMAIL PROTECTED]>:
Is there any --other-- part of the stack (eg mthca,cm) that needs to be > enhanced for that? Not a whole lot. We need an API to detect this feature support in HW. There could be a bit of work in mthca to detect HW/FW support for this feature, and enable connecting UC QPs to SRQ. There could be a bit of debugging work in CM in case we hit some bugs with LAP messages (which I plan to use for liveness detection).
Thanks for the info. Can you please elaborate a little more on the LAP based liveness detection mechanism you were thinking about? I might want to deploy it in another app. Actually, looking on IPoIB-CM RC based implementation I don't really understand its "liveness detection" mechanism... In ipoib_cm_send_req() I see that the code sets both the RC QP retries AND rnr retries to 0... doesn't this mean that a single RNR NAK would cause a TX QP to move to ERROR? can you clarify how do you use the "R" of "RC" here? thanks, Or.
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