Messages in this thread | | | From | Masahiro Yamada <> | Date | Sat, 16 Nov 2019 16:17:49 +0900 | Subject | Re: Recent slowdown in single object builds |
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On Sat, Nov 16, 2019 at 8:10 AM Jens Axboe <axboe@kernel.dk> wrote: > > Hi, > > I've noticed that current -git is a lot slower at doing single object > builds than earlier kernels. Here's an example, building the exact same > file on 5.2 and -git: > > $ time make fs/io_uring.o > real 0m5.953s > user 0m5.402s > sys 0m0.649s > > vs 5.2 based (with all the backports, identical file): > > $ time make fs/io_uring.o > real 0m3.218s > user 0m2.968s > sys 0m0.520s > > Any idea what's going on here? It's almost twice as slow, which is > problematic...
This is necessary cost to do single builds (394053f4a4b3e3eeeaa67b67fc886a9a75bd9e4d) but, it is much better in linux-next.
-- Best Regards Masahiro Yamada
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