diff options
| author | Sergey Senozhatsky <senozhatsky@chromium.org> | 2022-11-09 14:50:46 +0300 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2022-12-01 02:58:53 +0300 |
| commit | b46f9ea3cb351587b2cfc68f7211f7a7cc5b6673 (patch) | |
| tree | daf5737bdb1ea5c912e3d308ca2aeefee9037d8a /drivers/block | |
| parent | 443dd798062c1549e790539e572cbda4b7a8df30 (diff) | |
| download | linux-b46f9ea3cb351587b2cfc68f7211f7a7cc5b6673.tar.xz | |
zram: add incompressible writeback
Add support for incompressible pages writeback:
echo incompressible > /sys/block/zramX/writeback
Link: https://lkml.kernel.org/r/20221109115047.2921851-13-senozhatsky@chromium.org
Signed-off-by: Sergey Senozhatsky <senozhatsky@chromium.org>
Acked-by: Minchan Kim <minchan@kernel.org>
Cc: Alexey Romanov <avromanov@sberdevices.ru>
Cc: Nhat Pham <nphamcs@gmail.com>
Cc: Nitin Gupta <ngupta@vflare.org>
Cc: Suleiman Souhlal <suleiman@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'drivers/block')
| -rw-r--r-- | drivers/block/zram/zram_drv.c | 18 |
1 files changed, 12 insertions, 6 deletions
diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c index 798c421fdd36..25b7ff2b56bf 100644 --- a/drivers/block/zram/zram_drv.c +++ b/drivers/block/zram/zram_drv.c @@ -645,10 +645,10 @@ static int read_from_bdev_async(struct zram *zram, struct bio_vec *bvec, #define PAGE_WB_SIG "page_index=" -#define PAGE_WRITEBACK 0 -#define HUGE_WRITEBACK (1<<0) -#define IDLE_WRITEBACK (1<<1) - +#define PAGE_WRITEBACK 0 +#define HUGE_WRITEBACK (1<<0) +#define IDLE_WRITEBACK (1<<1) +#define INCOMPRESSIBLE_WRITEBACK (1<<2) static ssize_t writeback_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t len) @@ -669,6 +669,8 @@ static ssize_t writeback_store(struct device *dev, mode = HUGE_WRITEBACK; else if (sysfs_streq(buf, "huge_idle")) mode = IDLE_WRITEBACK | HUGE_WRITEBACK; + else if (sysfs_streq(buf, "incompressible")) + mode = INCOMPRESSIBLE_WRITEBACK; else { if (strncmp(buf, PAGE_WB_SIG, sizeof(PAGE_WB_SIG) - 1)) return -EINVAL; @@ -731,11 +733,15 @@ static ssize_t writeback_store(struct device *dev, goto next; if (mode & IDLE_WRITEBACK && - !zram_test_flag(zram, index, ZRAM_IDLE)) + !zram_test_flag(zram, index, ZRAM_IDLE)) goto next; if (mode & HUGE_WRITEBACK && - !zram_test_flag(zram, index, ZRAM_HUGE)) + !zram_test_flag(zram, index, ZRAM_HUGE)) goto next; + if (mode & INCOMPRESSIBLE_WRITEBACK && + !zram_test_flag(zram, index, ZRAM_INCOMPRESSIBLE)) + goto next; + /* * Clearing ZRAM_UNDER_WB is duty of caller. * IOW, zram_free_page never clear it. |