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| author | Sergey Senozhatsky <senozhatsky@chromium.org> | 2023-11-15 03:42:12 +0100 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-12-11 01:51:40 +0100 |
| commit | a7a0350583ba51d8cde6180bb51d704b89a3b29e (patch) | |
| tree | bed2a38e17a2e1c3f78e97efe5273dd02be4c079 /drivers/block/zram/Kconfig | |
| parent | mm/page_owner: record and dump free_pid and free_tgid (diff) | |
| download | linux-a7a0350583ba51d8cde6180bb51d704b89a3b29e.tar.xz linux-a7a0350583ba51d8cde6180bb51d704b89a3b29e.zip | |
zram: split memory-tracking and ac-time tracking
ZRAM_MEMORY_TRACKING enables two features:
- per-entry ac-time tracking
- debugfs interface
The latter one is the reason why memory-tracking depends on DEBUG_FS,
while the former one is used far beyond debugging these days. Namely
ac-time is used for fine grained writeback of idle entries (pages).
Move ac-time tracking under its own config option so that it can be
enabled (along with writeback) on systems without DEBUG_FS.
[senozhatsky@chromium.org: ifdef fixup, per Dmytro]
Link: https://lkml.kernel.org/r/20231117013543.540280-1-senozhatsky@chromium.org
Link: https://lkml.kernel.org/r/20231115024223.4133148-1-senozhatsky@chromium.org
Signed-off-by: Sergey Senozhatsky <senozhatsky@chromium.org>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Dmytro Maluka <dmaluka@chromium.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'drivers/block/zram/Kconfig')
| -rw-r--r-- | drivers/block/zram/Kconfig | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/drivers/block/zram/Kconfig b/drivers/block/zram/Kconfig index 0386b7da02aa..af201392ed52 100644 --- a/drivers/block/zram/Kconfig +++ b/drivers/block/zram/Kconfig @@ -69,9 +69,18 @@ config ZRAM_WRITEBACK See Documentation/admin-guide/blockdev/zram.rst for more information. +config ZRAM_TRACK_ENTRY_ACTIME + bool "Track access time of zram entries" + depends on ZRAM + help + With this feature zram tracks access time of every stored + entry (page), which can be used for a more fine grained IDLE + pages writeback. + config ZRAM_MEMORY_TRACKING bool "Track zRam block status" depends on ZRAM && DEBUG_FS + select ZRAM_TRACK_ENTRY_ACTIME help With this feature, admin can track the state of allocated blocks of zRAM. Admin could see the information via @@ -86,4 +95,4 @@ config ZRAM_MULTI_COMP This will enable multi-compression streams, so that ZRAM can re-compress pages using a potentially slower but more effective compression algorithm. Note, that IDLE page recompression - requires ZRAM_MEMORY_TRACKING. + requires ZRAM_TRACK_ENTRY_ACTIME. |