Regression: SIW_MAX_INLINE decreased from 72 to 64
patrickmacarthur opened this issue · comments
openmpi fails to run against softiwarp with default parameters, as commit f1a754b decreased the max inline limit from 72 to 64, because 8 bytes were removed from struct siw_sge. openmpi has the inline limit for softiwarp set to 72 in its configuration file, so unless the user specifically overrides this, openmpi will always fail trying to create a QP since the max_inline_data it passes is greater than the limit.
The easiest solution that I can see would be to increase SIW_MAX_SGE from 5 to 6, which would allow for 80 bytes of inline data.
...interesting side effect! right - will do so, even if it increases the
stack size for the siw_tx_hdt() function. maybe i should consider better
changing the array allocations in that function to dynamic kmalloc or keep
the memory at the QP.
Thanks!
Bernard.
From: Patrick MacArthur <notifications@github.com>
To: zrlio/softiwarp <softiwarp@noreply.github.com>
Cc: Subscribed <subscribed@noreply.github.com>
Date: 05/04/2017 05:33 PM
Subject: [zrlio/softiwarp] Regression: SIW_MAX_INLINE decreased from 72
to 64 (#13)
openmpi fails to run against softiwarp with default parameters, as commit
f1a754b decreased the max inline limit from 72 to 64, because 8 bytes were
removed from struct siw_sge. openmpi has the inline limit for softiwarp set
to 72 in its configuration file, so unless the user specifically overrides
this, openmpi will always fail trying to create a QP since the
max_inline_data it passes is greater than the limit.
The easiest solution that I can see would be to increase SIW_MAX_SGE from 5
to 6, which would allow for 80 bytes of inline data.
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