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Blame SOURCES/0704-shared-sleep-config-exclude-zram-devices-from-hibern.patch

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From 8fc26bd114d2aa997da261ac7c488d4c25116af3 Mon Sep 17 00:00:00 2001
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From: Andrew Jorgensen <ajorgens@amazon.com>
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Date: Wed, 25 Jul 2018 08:06:57 -0700
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Subject: [PATCH] shared/sleep-config: exclude zram devices from hibernation
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 candidates
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On a host with sufficiently large zram but with no actual swap, logind will
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respond to CanHibernate() with yes. With this patch, it will correctly respond
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no, unless there are other swap devices to consider.
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(cherry picked from commit 411ae92b407bd7b4549b205ad754bcd0e3dfd81f)
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Resolves: #1609816
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---
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 src/shared/sleep-config.c | 17 ++++++++++++++---
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 1 file changed, 14 insertions(+), 3 deletions(-)
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diff --git a/src/shared/sleep-config.c b/src/shared/sleep-config.c
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index 1064fd5cbd..c4334652fc 100644
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--- a/src/shared/sleep-config.c
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+++ b/src/shared/sleep-config.c
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@@ -25,6 +25,7 @@
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 #include "sleep-config.h"
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 #include "fileio.h"
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 #include "log.h"
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+#include "path-util.h"
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 #include "strv.h"
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 #include "util.h"
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@@ -202,9 +203,19 @@ static int hibernation_partition_size(size_t *size, size_t *used) {
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                         continue;
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                 }
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-                if (streq(type, "partition") && endswith(dev, "\\040(deleted)")) {
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-                        log_warning("Ignoring deleted swapfile '%s'.", dev);
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-                        continue;
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+                if (streq(type, "partition")) {
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+                        const char *fn;
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+
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+                        if (endswith(dev, "\\040(deleted)")) {
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+                                log_warning("Ignoring deleted swapfile '%s'.", dev);
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+                                continue;
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+                        }
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+
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+                        fn = path_startswith(dev, "/dev/");
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+                        if (fn && startswith(fn, "zram")) {
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+                                log_debug("Ignoring compressed ram swap device '%s'.", dev);
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+                                continue;
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+                        }
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                 }
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                 *size = size_field;