The patch titled
Subject: mm/zswap: skip confusing print info
has been added to the -mm mm-unstable branch. Its filename is
mm-zswap-skip-confusing-print-info.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-zswap-skip-confusing-print-info.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Liu Shixin <liushixin2@xxxxxxxxxx>
Subject: mm/zswap: skip confusing print info
Date: Mon, 29 Aug 2022 21:23:02 +0800
It's confusing when we disable zswap while zswap init failed or has no
pool. If no change required, just return directly.
Link: https://lkml.kernel.org/r/20220829132302.3367054-7-liushixin2@xxxxxxxxxx
Signed-off-by: Liu Shixin <liushixin2@xxxxxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxx>
Cc: Dan Streetman <ddstreet@xxxxxxxx>
Cc: Kefeng Wang <wangkefeng.wang@xxxxxxxxxx>
Cc: Nathan Chancellor <nathan@xxxxxxxxxx>
Cc: Seth Jennings <sjenning@xxxxxxxxxx>
Cc: Vitaly Wool <vitaly.wool@xxxxxxxxxxxx>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/zswap.c | 9 +++++++++
1 file changed, 9 insertions(+)
--- a/mm/zswap.c~mm-zswap-skip-confusing-print-info
+++ a/mm/zswap.c
@@ -886,6 +886,15 @@ static int zswap_zpool_param_set(const c
static int zswap_enabled_param_set(const char *val,
const struct kernel_param *kp)
{
+ bool res;
+
+ if (kstrtobool(val, &res))
+ return -EINVAL;
+
+ /* no change required */
+ if (res == *(bool *)kp->arg)
+ return 0;
+
if (system_state == SYSTEM_RUNNING) {
mutex_lock(&zswap_init_lock);
if (zswap_setup()) {
_
Patches currently in -mm which might be from liushixin2@xxxxxxxxxx are
revert-frontswap-remove-support-for-multiple-ops.patch
revert-mm-mark-swap_lock-and-swap_active_head-static.patch
revert-frontswap-simplify-frontswap_register_ops.patch
mm-zswap-replace-zswap_init_started-failed-with-zswap_init_state.patch
mm-zswap-delay-the-initializaton-of-zswap-until-the-first-enablement.patch
mm-zswap-skip-confusing-print-info.patch
