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  • !1052

Closed
Created Feb 27, 2020 by Christian Hergert@chergertDeveloper
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Fix blocking I/O on main thread

  • Overview 19
  • Commits 5
  • Changes 9

These fix a number of issues that were causing I/O blockages on the main thread making the shell stall during heavy I/O workloads.

With them applied, I can use Shell on CentOS/RHEL 7 without stalls while doing a lot of background I/O (generated with a heavy fio script which exhausts ram with heavy sequential write load).

I used https://gitlab.gnome.org/chergert/iobt as a LD_PRELOAD to catch various fsync/open/etc syscalls and load the callgraph into Sysprof.

Just a reminder that this is for the 3.28, most patches are already available on master or have separate MRs

Edited Mar 08, 2020 by Christian Hergert
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Source branch: wip/chergert/3-28-perf-fixes