+ zram-clear-idle-flag-in-mark_idle.patch added to mm-unstable branch

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The patch titled
     Subject: zram: clear IDLE flag in mark_idle()
has been added to the -mm mm-unstable branch.  Its filename is
     zram-clear-idle-flag-in-mark_idle.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/zram-clear-idle-flag-in-mark_idle.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: Sergey Senozhatsky <senozhatsky@xxxxxxxxxxxx>
Subject: zram: clear IDLE flag in mark_idle()
Date: Mon, 28 Oct 2024 16:34:58 +0900

If entry does not fulfill current mark_idle() parameters, e.g.  cutoff
time, then we should clear its ZRAM_IDLE from previous mark_idle()
invocations.

Consider the following case:
- mark_idle() cutoff time 8h
- mark_idle() cutoff time 4h
- writeback() idle - will writeback entries with cutoff time 8h,
  while it should only pick entries with cutoff time 4h

Link: https://lkml.kernel.org/r/20241028073529.1383980-3-senozhatsky@xxxxxxxxxxxx
Signed-off-by: Sergey Senozhatsky <senozhatsky@xxxxxxxxxxxx>
Reported-by: Shin Kawamura <kawasin@xxxxxxxxxx>
Cc: Minchan Kim <minchan@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---

 drivers/block/zram/zram_drv.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/block/zram/zram_drv.c~zram-clear-idle-flag-in-mark_idle
+++ a/drivers/block/zram/zram_drv.c
@@ -410,6 +410,8 @@ static void mark_idle(struct zram *zram,
 #endif
 		if (is_idle)
 			zram_set_flag(zram, index, ZRAM_IDLE);
+		else
+			zram_clear_flag(zram, index, ZRAM_IDLE);
 		zram_slot_unlock(zram, index);
 	}
 }
_

Patches currently in -mm which might be from senozhatsky@xxxxxxxxxxxx are

zram-introduce-zram_pp_slot-flag.patch
zram-permit-only-one-post-processing-operation-at-a-time.patch
zram-rework-recompress-target-selection-strategy.patch
zram-rework-recompress-target-selection-strategy-fix.patch
zram-rework-writeback-target-selection-strategy.patch
zram-do-not-mark-idle-slots-that-cannot-be-idle.patch
zram-reshuffle-zram_free_page-flags-operations.patch
zram-remove-under_wb-and-simplify-writeback.patch
zram-do-not-open-code-comp-priority-0.patch
zram-clear-idle-flag-after-recompression.patch
zram-clear-idle-flag-in-mark_idle.patch





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