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From 681c50c34fb55f06d4a41f12dc84c4c6e6f22bfb Mon Sep 17 00:00:00 2001
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Message-Id: <681c50c34fb55f06d4a41f12dc84c4c6e6f22bfb.1377873642.git.jdenemar@redhat.com>
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From: Michal Privoznik <mprivozn@redhat.com>
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Date: Mon, 26 Aug 2013 17:41:46 +0200
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Subject: [PATCH] docs: Discourage users to set hard_limit
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https://bugzilla.redhat.com/show_bug.cgi?id=1001143
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In one of my previous patches I am removing the hard_limit heuristic to
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guess the correct value if none set. However, it turned out, this limit
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is hard to guess even for users. We should advise them to not set the
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limit as their domains may be OOM killed. Sigh.
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(cherry picked from commit 09adfdc62de2bbba71580839f735ec07a356c762)
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---
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docs/formatdomain.html.in | 6 +++++-
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1 file changed, 5 insertions(+), 1 deletion(-)
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diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in
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index a1803df..fb4238e 100644
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--- a/docs/formatdomain.html.in
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+++ b/docs/formatdomain.html.in
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@@ -676,7 +676,11 @@
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hard_limit
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The optional hard_limit element is the maximum memory
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the guest can use. The units for this value are kibibytes (i.e. blocks
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- of 1024 bytes)
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+ of 1024 bytes). However, users of QEMU and KVM are strongly
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+ advised not to set this limit as domain may get killed by the kernel.
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+ To determine the memory needed for a process to run is
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+
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+ undecidable problem.
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soft_limit
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The optional soft_limit element is the memory limit to
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enforce during memory contention. The units for this value are
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--
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1.8.3.2
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