The patch titled Subject: zram: tweak writeback config help has been added to the -mm mm-unstable branch. Its filename is zram-tweak-writeback-config-help.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/zram-tweak-writeback-config-help.patch This patch will later appear in the mm-unstable branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next via the mm-everything branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there every 2-3 working days ------------------------------------------------------ From: Sergey Senozhatsky <senozhatsky@xxxxxxxxxxxx> Subject: zram: tweak writeback config help Date: Wed, 15 Nov 2023 11:42:13 +0900 Writeback is for incompressible and idle zram pages. Link: https://lkml.kernel.org/r/20231115024223.4133148-2-senozhatsky@xxxxxxxxxxxx Signed-off-by: Sergey Senozhatsky <senozhatsky@xxxxxxxxxxxx> Cc: Minchan Kim <minchan@xxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- drivers/block/zram/Kconfig | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/drivers/block/zram/Kconfig~zram-tweak-writeback-config-help +++ a/drivers/block/zram/Kconfig @@ -59,8 +59,8 @@ config ZRAM_WRITEBACK bool "Write back incompressible or idle page to backing device" depends on ZRAM help - With incompressible page, there is no memory saving to keep it - in memory. Instead, write it out to backing device. + This lets zram entries (incompressible or idle pages) be written + back to a backing device, helping save memory. For this feature, admin should set up backing device via /sys/block/zramX/backing_dev. _ Patches currently in -mm which might be from senozhatsky@xxxxxxxxxxxx are zram-split-memory-tracking-and-ac-time-tracking.patch zram-tweak-writeback-config-help.patch