[Bug 280846] Low memory freezes / OOM: a thread waited too long to allocate a page

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=280846

--- Comment #3 from Mark Millard <marklmi26-fbsd@yahoo.com> ---
(In reply to Mark Millard from comment #2)

FYI: I should have noted that vm_pageout_oom(VM_OOM_MEM_PF)
leads to the notice: "a thread waited too long to allocate
a page".

Also the message that I quoted in #2 is my variant of what
is instead under: "if (bootverbose)" in standard FreeBSD
code.

So if you do a verbose boot, you should seem messages
based on:

       if (bootverbose)
               printf(
           "proc %d (%s) failed to alloc page on fault, starting OOM\n",
                   curproc->p_pid, curproc->p_comm);

which would report the exact process that had the
failure to allocate a page in a timely manor for
handling a page fault. (Presumes you are not using
vm.pfault_oom_attempts=-1 .)

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