24 lines
1.0 KiB
Diff
24 lines
1.0 KiB
Diff
commit 9a8dc789e83b869ef8c56cc94741dbc3a191f55b
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Author: Jan Rybar <jrybar@redhat.com>
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Date: Tue Oct 28 06:37:03 2025 +0000
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free manpage: note on negative value with overcommitt enabled
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diff --git a/man/free.1 b/man/free.1
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index 02dae847..3816754a 100644
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--- a/man/free.1
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+++ b/man/free.1
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@@ -142,7 +142,11 @@ Display a line showing the column totals.
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\fB\-v\fR, \fB\-\-committed\fR
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Display a line showing the memory commit limit and amount of committed/uncommitted
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memory. The \fBtotal\fR column on this line will display the memory commit
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-limit. This line is relevant if memory overcommit is disabled.
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+limit. This line is relevant if memory overcommit is disabled. On systems
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+with memory overcommit enabled, the \fBfree\fR value can temporarily appear
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+negative. This is not a bug, but an effect of overcommit, as the system has promised
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+more memory than the total of its virtual address space.
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+The negative value indicates the magnitude of the system's memory over-allocation.
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.TP
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\fB\-\-help\fR
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Print help.
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