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From a7f11e525e9dd5abf844ada0ddd0ae74950e2e40 Mon Sep 17 00:00:00 2001
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From: Karel Zak <kzak@redhat.com>
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Date: Thu, 30 Mar 2017 12:10:01 +0200
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Subject: [PATCH] zramctl: make mm_stat parser more robust
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Let's fallback to attribute files if mm_stat file is incomplete. It
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should not happen, but I have seen RHEL7 kernel where is no
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num_migrated/pages_compacted attribute...
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Addresses: http://bugzilla.redhat.com/show_bug.cgi?id=1358755
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Upstream: http://github.com/karelzak/util-linux/commit/2546d54bd8b0ceac75d6d7e6c483479022d97509
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Signed-off-by: Karel Zak <kzak@redhat.com>
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---
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sys-utils/zramctl.c | 8 ++++++--
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1 file changed, 6 insertions(+), 2 deletions(-)
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diff --git a/sys-utils/zramctl.c b/sys-utils/zramctl.c
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index 853401c..c3112d6 100644
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--- a/sys-utils/zramctl.c
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+++ b/sys-utils/zramctl.c
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@@ -359,8 +359,12 @@ static char *get_mm_stat(struct zram *z, size_t idx, int bytes)
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str = sysfs_strdup(sysfs, "mm_stat");
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if (str) {
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z->mm_stat = strv_split(str, " ");
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- if (strv_length(z->mm_stat) < ARRAY_SIZE(mm_stat_names))
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- errx(EXIT_FAILURE, _("Failed to parse mm_stat"));
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+
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+ /* make sure kernel provides mm_stat as expected */
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+ if (strv_length(z->mm_stat) < ARRAY_SIZE(mm_stat_names)) {
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+ strv_free(z->mm_stat);
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+ z->mm_stat = NULL;
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+ }
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}
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z->mm_stat_probed = 1;
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free(str);
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--
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2.9.3
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