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path: root/include/linux/part_stat.h
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2020-12-01block: switch partition lookup to use struct block_deviceChristoph Hellwig1-9/+8
Use struct block_device to lookup partitions on a disk. This removes all usage of struct hd_struct from the I/O path. Signed-off-by: Christoph Hellwig <[email protected]> Reviewed-by: Jan Kara <[email protected]> Reviewed-by: Hannes Reinecke <[email protected]> Acked-by: Coly Li <[email protected]> [bcache] Acked-by: Chao Yu <[email protected]> [f2fs] Signed-off-by: Jens Axboe <[email protected]>
2020-12-01block: allocate struct hd_struct as part of struct bdev_inodeChristoph Hellwig1-2/+2
Allocate hd_struct together with struct block_device to pre-load the lifetime rule changes in preparation of merging the two structures. Note that part0 was previously embedded into struct gendisk, but is a separate allocation now, and already points to the block_device instead of the hd_struct. The lifetime of struct gendisk is still controlled by the struct device embedded in the part0 hd_struct. Signed-off-by: Christoph Hellwig <[email protected]> Reviewed-by: Jan Kara <[email protected]> Reviewed-by: Hannes Reinecke <[email protected]> Signed-off-by: Jens Axboe <[email protected]>
2020-12-01block: move disk stat accounting to struct block_deviceChristoph Hellwig1-19/+19
Move the dkstats and stamp field to struct block_device in preparation of killing struct hd_struct. Signed-off-by: Christoph Hellwig <[email protected]> Reviewed-by: Jan Kara <[email protected]> Reviewed-by: Hannes Reinecke <[email protected]> Signed-off-by: Jens Axboe <[email protected]>
2020-05-27block: use __this_cpu_add() instead of access by smp_processor_id()Konstantin Khlebnikov1-1/+1
Most architectures have fast path to access percpu for current cpu. The required preempt_disable() is provided by part_stat_lock(). [hch: rebased] Signed-off-by: Konstantin Khlebnikov <[email protected]> Signed-off-by: Christoph Hellwig <[email protected]> Signed-off-by: Jens Axboe <[email protected]>
2020-05-27block: remove rcu_read_lock() from part_stat_lock()Konstantin Khlebnikov1-2/+2
The RCU lock is required only in disk_map_sector_rcu() to lookup the partition. After that request holds reference to related hd_struct. Replace get_cpu() with preempt_disable() - returned cpu index is unused. [hch: rebased] Signed-off-by: Konstantin Khlebnikov <[email protected]> Signed-off-by: Christoph Hellwig <[email protected]> Signed-off-by: Jens Axboe <[email protected]>
2020-05-27block: always use a percpu variable for disk statsChristoph Hellwig1-44/+11
percpu variables have a perfectly fine working stub implementation for UP kernels, so use that. Signed-off-by: Christoph Hellwig <[email protected]> Reviewed-by: Konstantin Khlebnikov <[email protected]> Signed-off-by: Jens Axboe <[email protected]>
2020-03-25block: move the part_stat* helpers from genhd.h to a new headerChristoph Hellwig1-0/+115
These macros are just used by a few files. Move them out of genhd.h, which is included everywhere into a new standalone header. Signed-off-by: Christoph Hellwig <[email protected]> Signed-off-by: Jens Axboe <[email protected]>
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