diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/block/zram/zram_drv.c | 25 | ||||
| -rw-r--r-- | drivers/block/zram/zram_drv.h | 1 |
2 files changed, 26 insertions, 0 deletions
diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c index 871bd3550cb0..1626961fdb2f 100644 --- a/drivers/block/zram/zram_drv.c +++ b/drivers/block/zram/zram_drv.c @@ -63,6 +63,27 @@ static inline struct zram *dev_to_zram(struct device *dev) return (struct zram *)dev_to_disk(dev)->private_data; } +static ssize_t compact_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t len) +{ + unsigned long nr_migrated; + struct zram *zram = dev_to_zram(dev); + struct zram_meta *meta; + + down_read(&zram->init_lock); + if (!init_done(zram)) { + up_read(&zram->init_lock); + return -EINVAL; + } + + meta = zram->meta; + nr_migrated = zs_compact(meta->mem_pool); + atomic64_add(nr_migrated, &zram->stats.num_migrated); + up_read(&zram->init_lock); + + return len; +} + static ssize_t disksize_show(struct device *dev, struct device_attribute *attr, char *buf) { @@ -1017,6 +1038,7 @@ static const struct block_device_operations zram_devops = { .owner = THIS_MODULE }; +static DEVICE_ATTR_WO(compact); static DEVICE_ATTR_RW(disksize); static DEVICE_ATTR_RO(initstate); static DEVICE_ATTR_WO(reset); @@ -1035,6 +1057,7 @@ ZRAM_ATTR_RO(invalid_io); ZRAM_ATTR_RO(notify_free); ZRAM_ATTR_RO(zero_pages); ZRAM_ATTR_RO(compr_data_size); +ZRAM_ATTR_RO(num_migrated); static struct attribute *zram_disk_attrs[] = { &dev_attr_disksize.attr, @@ -1044,6 +1067,8 @@ static struct attribute *zram_disk_attrs[] = { &dev_attr_num_writes.attr, &dev_attr_failed_reads.attr, &dev_attr_failed_writes.attr, + &dev_attr_num_migrated.attr, + &dev_attr_compact.attr, &dev_attr_invalid_io.attr, &dev_attr_notify_free.attr, &dev_attr_zero_pages.attr, diff --git a/drivers/block/zram/zram_drv.h b/drivers/block/zram/zram_drv.h index 17056e589146..570c598f4ce9 100644 --- a/drivers/block/zram/zram_drv.h +++ b/drivers/block/zram/zram_drv.h @@ -84,6 +84,7 @@ struct zram_stats { atomic64_t compr_data_size; /* compressed size of pages stored */ atomic64_t num_reads; /* failed + successful */ atomic64_t num_writes; /* --do-- */ + atomic64_t num_migrated; /* no. of migrated object */ atomic64_t failed_reads; /* can happen when memory is too low */ atomic64_t failed_writes; /* can happen when memory is too low */ atomic64_t invalid_io; /* non-page-aligned I/O requests */ |