diff options
| author | Sergey Senozhatsky <[email protected]> | 2022-11-09 20:50:39 +0900 |
|---|---|---|
| committer | Andrew Morton <[email protected]> | 2022-11-30 15:58:51 -0800 |
| commit | 60e9b39ebec56467c36c3da76eee28083196cdf1 (patch) | |
| tree | 09238df8e4cf96f9c6e4bdefa149d4f762e47128 | |
| parent | 84b33bf7888975d28c0e57011b75c445279c60ec (diff) | |
zram: add recompress flag to read_block_state()
Add a new flag to zram block state that shows if the page was recompressed
(using alternative compression algorithm).
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Sergey Senozhatsky <[email protected]>
Acked-by: Minchan Kim <[email protected]>
Cc: Alexey Romanov <[email protected]>
Cc: Nhat Pham <[email protected]>
Cc: Nitin Gupta <[email protected]>
Cc: Suleiman Souhlal <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
| -rw-r--r-- | Documentation/admin-guide/blockdev/zram.rst | 9 | ||||
| -rw-r--r-- | drivers/block/zram/zram_drv.c | 5 |
2 files changed, 9 insertions, 5 deletions
diff --git a/Documentation/admin-guide/blockdev/zram.rst b/Documentation/admin-guide/blockdev/zram.rst index c73b16930449..177a142c3146 100644 --- a/Documentation/admin-guide/blockdev/zram.rst +++ b/Documentation/admin-guide/blockdev/zram.rst @@ -411,9 +411,10 @@ pages of the process with*pagemap. If you enable the feature, you could see block state via /sys/kernel/debug/zram/zram0/block_state". The output is as follows:: - 300 75.033841 .wh. - 301 63.806904 s... - 302 63.806919 ..hi + 300 75.033841 .wh.. + 301 63.806904 s.... + 302 63.806919 ..hi. + 303 62.801919 ....r First column zram's block index. @@ -430,6 +431,8 @@ Third column huge page i: idle page + r: + recompressed page (secondary compression algorithm) First line of above example says 300th block is accessed at 75.033841sec and the block's state is huge so it is written back to the backing diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c index 97300b3a83c3..ddbfa70ef9a3 100644 --- a/drivers/block/zram/zram_drv.c +++ b/drivers/block/zram/zram_drv.c @@ -936,13 +936,14 @@ static ssize_t read_block_state(struct file *file, char __user *buf, ts = ktime_to_timespec64(zram->table[index].ac_time); copied = snprintf(kbuf + written, count, - "%12zd %12lld.%06lu %c%c%c%c\n", + "%12zd %12lld.%06lu %c%c%c%c%c\n", index, (s64)ts.tv_sec, ts.tv_nsec / NSEC_PER_USEC, zram_test_flag(zram, index, ZRAM_SAME) ? 's' : '.', zram_test_flag(zram, index, ZRAM_WB) ? 'w' : '.', zram_test_flag(zram, index, ZRAM_HUGE) ? 'h' : '.', - zram_test_flag(zram, index, ZRAM_IDLE) ? 'i' : '.'); + zram_test_flag(zram, index, ZRAM_IDLE) ? 'i' : '.', + zram_get_priority(zram, index) ? 'r' : '.'); if (count <= copied) { zram_slot_unlock(zram, index); |