ubuntu - 整个主机被锁定并在 bitbake 运行时关闭所有应用程序

Question

我最近在运行 build-image 时开始看到这个问题编译一个 Yocto 镜像，它会在完成构建 60% 左右后锁定整个 Linux 机器，并且在记录它时，你会看到机器好像被重置了。
dmesg 日志如下所示:

  523.735767] JBD2: Error while async write back metadata bh 3155745.
[  523.735768] JBD2: Error while async write back metadata bh 3155746.
[  523.735769] JBD2: Error while async write back metadata bh 3155747.
[  523.735770] JBD2: Error while async write back metadata bh 3155748.
[  523.735770] JBD2: Error while async write back metadata bh 3155749.
[  523.735771] JBD2: Error while async write back metadata bh 3155750.
[  523.735772] JBD2: Error while async write back metadata bh 3155751.
[  523.735772] JBD2: Error while async write back metadata bh 3155752.
[  523.735773] JBD2: Error while async write back metadata bh 3155753.
[  523.735776] JBD2: Error while async write back metadata bh 3155754.
[  523.735777] JBD2: Error while async write back metadata bh 3155755.
[  523.735777] JBD2: Error while async write back metadata bh 3155756.
[  523.735778] JBD2: Error while async write back metadata bh 3155757.
[  523.735779] JBD2: Error while async write back metadata bh 3155758.
[ 7248.626788] perf: interrupt took too long (2511 > 2500), lowering kernel.perf_event_max_sample_rate to 79500
[ 8308.051016] show_signal_msg: 19 callbacks suppressed
[ 8308.051018] TeamViewer_Desk[3117]: segfault at 7f3b36502d8e ip 00007f3b47cb0ccb sp 00007f3b26dc4c40 error 4 in libgcc_s.so.1[7f3b47ca2000+16000]
[ 8308.092048] TeamViewer[3014]: segfault at 429745010 ip 00007faf67fc4e38 sp 00007ffd70549770 error 6 in libc-2.23.so[7faf67f43000+1c0000]

我正在使用 Ubuntu 16.04

Answer 1

看起来相当多的线程并行运行导致系统启动/锁定。
将线程数修改为 4 就可以了。

BB_NUMBER_THREADS = 4