• Mathias Krause's avatar
    padata: ensure padata_do_serial() runs on the correct CPU · 350ef88e
    Mathias Krause authored
    If the algorithm we're parallelizing is asynchronous we might change
    CPUs between padata_do_parallel() and padata_do_serial(). However, we
    don't expect this to happen as we need to enqueue the padata object into
    the per-cpu reorder queue we took it from, i.e. the same-cpu's parallel
    queue.
    
    Ensure we're not switching CPUs for a given padata object by tracking
    the CPU within the padata object. If the serial callback gets called on
    the wrong CPU, defer invoking padata_reorder() via a kernel worker on
    the CPU we're expected to run on.
    Signed-off-by: default avatarMathias Krause <minipli@googlemail.com>
    Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
    350ef88e
padata.h 6.02 KB