On 2/19/20 4:09 PM, Jens Axboe wrote: > On 2/19/20 1:29 PM, Avi Kivity wrote: >> On 2/19/20 10:25 PM, Glauber Costa wrote: >>> On Wed, Feb 19, 2020 at 3:13 PM Jens Axboe <axboe@xxxxxxxxx> wrote: >>>> On 2/19/20 1:11 PM, Glauber Costa wrote: >>>>> On Wed, Feb 19, 2020 at 3:09 PM Jens Axboe <axboe@xxxxxxxxx> wrote: >>>>>> On 2/19/20 9:23 AM, Glauber Costa wrote: >>>>>>> Hi, >>>>>>> >>>>>>> I started using af0a72622a1fb7179cf86ae714d52abadf7d8635 today so I could consume the new fast poll flag, and one of my tests that was previously passing now crashes >>>>>> Thanks for testing the new stuff! As always, would really appreciate a >>>>>> test case that I can run, makes my job so much easier. >>>>> Trigger warning: >>>>> It's in C++. >>>> As long as it reproduces, I don't really have to look at it :-) >>> Instructions: >>> 1. clone https://github.com/glommer/seastar.git, branch uring-accept-crash >>> 2. git submodule update --recursive --init, because we have a shit-ton >>> of submodules because why not. >> >> >> Actually, seastar has only one submodule (dpdk) and it is optional, so >> you need not clone it. >> >> >>> 3. install all dependencies with ./install-dependencies.sh >>> note: that does not install liburing yet, you need to have at >>> least 0.4 (I trust you do), with the patch I just sent to add the fast >>> poll flag. It still fails sometimes in my system if liburing is >>> installed in /usr/lib instead of /usr/lib64 because cmake is made by >>> the devil. >>> 3. ./configure.py --mode=release >> >> >> --mode dev will compile many times faster >> >> >>> 4. ninja -C build/release tests/unit/unix_domain_test >>> 5. crash your system (hopefully) by executing >>> ./build/release/tests/unit/unix_domain_test -- -c1 >>> --reactor-backend=uring >>> >> s/release/dev/ in steps 4, 5 if you use dev mode. > > Thanks, this is great, I can reproduce! Can you try the current branch? Should be 77aac7e7738 (or newer). -- Jens Axboe
