I'm going to downgrade the severity of this bug to wishlist for the following reasons:
1) upstream ceph test with specific jerasure versions, stepping outside of this will potentially cause issues and increase the maintenance burden on an under-resourced team. 2) ceph builds multiple versions of the embedded jerasure with different levels of CPU optimisation and loads these as plugins based on runtime CPU detection; switching to linking directly against libjerasure a) won't work without patching out of this in the codebase and b) means we would only have the minimal CPU baseline that libjerasure currently builds with, crippling performance on more modern CPU's.
