[Bug 278601] kern.ipc.maxpipekva exhaustion description in tuning(7)

From: <bugzilla-noreply_at_freebsd.org>
Date: Fri, 26 Apr 2024 22:04:18 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=278601

            Bug ID: 278601
           Summary: kern.ipc.maxpipekva exhaustion description in
                    tuning(7)
           Product: Documentation
           Version: Latest
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: Manual Pages
          Assignee: bugs@FreeBSD.org
          Reporter: piotr@durlej.net
                CC: doc@FreeBSD.org

According to tuning(7), with regard to the kern.ipc.maxpipekva tunable: "This
exhaustion is not fatal; however, and it will only cause pipes to fall back to
using double-copy."

This doesn't seem to be true any longer: pipe(2) fails with ENOMEM, opening
named pipes also fails with ENOMEM, ssh(1) logins fail with "error:
server_accept_loop: pipe(startup_p): Cannot allocate memory", and so on.

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