[lxc-devel] [lxcfs/master] meminfo: show host swap values when no limit or equal limits are set
brauner on Github
lxc-bot at linuxcontainers.org
Tue Nov 3 21:28:00 UTC 2020
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From 6da2a084789ed0122cacde5ee950cb9689daf7c4 Mon Sep 17 00:00:00 2001
From: Christian Brauner <christian.brauner at ubuntu.com>
Date: Tue, 3 Nov 2020 22:27:05 +0100
Subject: [PATCH] meminfo: show host swap values when no limit or equal limits
are set
Closes: #434
Signed-off-by: Christian Brauner <christian.brauner at ubuntu.com>
---
src/proc_fuse.c | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)
diff --git a/src/proc_fuse.c b/src/proc_fuse.c
index 907f5c7..7bc1eb0 100644
--- a/src/proc_fuse.c
+++ b/src/proc_fuse.c
@@ -1243,7 +1243,17 @@ static int proc_meminfo_read(char *buf, size_t size, off_t offset,
sscanf(line + STRLITERALLEN("SwapTotal:"), "%" PRIu64, &hostswtotal);
- if (hostswtotal < swtotal) {
+ /*
+ * If swtotal is 0 it should mean that
+ * memory.memsw.limit_in_bytes and
+ * memory.limit_in_bytes are both unlimited or
+ * both set to the same value. In both cases we
+ * have no idea what the technical swap limit
+ * is supposed to be (It's a shared limit
+ * anyway.) so fallback to the host's values in
+ * that case too.
+ */
+ if ((hostswtotal < swtotal) || swtotal == 0) {
swtotal = hostswtotal;
host_swap = true;
}
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