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md/md-bitmap: introduce bitmap_operations and make structure internal
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[md-6.12,v2,00/42] md/md-bitmap: introduce bitmap_operations and make structure internal
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[md-6.12,v2,01/42] md/raid1: use md_bitmap_wait_behind_writes() in raid1_read_request()
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[md-6.12,v2,02/42] md/md-bitmap: replace md_bitmap_status() with a new helper md_bitmap_get_stats()
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[md-6.12,v2,03/42] md: use new helper md_bitmap_get_stats() in update_array_info()
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[md-6.12,v2,04/42] md/md-bitmap: add 'events_cleared' into struct md_bitmap_stats
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[md-6.12,v2,05/42] md/md-cluster: fix spares warnings for __le64
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[md-6.12,v2,06/42] md/md-bitmap: add 'sync_size' into struct md_bitmap_stats
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[md-6.12,v2,07/42] md/md-bitmap: add 'file_pages' into struct md_bitmap_stats
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[md-6.12,v2,08/42] md/md-bitmap: add 'behind_writes' and 'behind_wait' into struct md_bitmap_stats
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[md-6.12,v2,09/42] md/md-cluster: use helper md_bitmap_get_stats() to get pages in resize_bitmaps()
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[md-6.12,v2,10/42] md/md-bitmap: add a new helper md_bitmap_set_pages()
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[md-6.12,v2,11/42] md/md-bitmap: introduce struct bitmap_operations
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[md-6.12,v2,12/42] md/md-bitmap: simplify md_bitmap_create() + md_bitmap_load()
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[md-6.12,v2,13/42] md/md-bitmap: merge md_bitmap_create() into bitmap_operations
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[md-6.12,v2,14/42] md/md-bitmap: merge md_bitmap_load() into bitmap_operations
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[md-6.12,v2,15/42] md/md-bitmap: merge md_bitmap_destroy() into bitmap_operations
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[md-6.12,v2,16/42] md/md-bitmap: merge md_bitmap_flush() into bitmap_operations
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[md-6.12,v2,17/42] md/md-bitmap: make md_bitmap_print_sb() internal
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[md-6.12,v2,18/42] md/md-bitmap: merge md_bitmap_update_sb() into bitmap_operations
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[md-6.12,v2,19/42] md/md-bitmap: merge md_bitmap_status() into bitmap_operations
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[md-6.12,v2,20/42] md/md-bitmap: remove md_bitmap_setallbits()
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[md-6.12,v2,21/42] md/md-bitmap: merge bitmap_write_all() into bitmap_operations
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[md-6.12,v2,22/42] md/md-bitmap: merge md_bitmap_dirty_bits() into bitmap_operations
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[md-6.12,v2,23/42] md/md-bitmap: merge md_bitmap_startwrite() into bitmap_operations
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[md-6.12,v2,24/42] md/md-bitmap: merge md_bitmap_endwrite() into bitmap_operations
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[md-6.12,v2,25/42] md/md-bitmap: merge md_bitmap_start_sync() into bitmap_operations
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[md-6.12,v2,26/42] md/md-bitmap: remove the parameter 'aborted' for md_bitmap_end_sync()
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[md-6.12,v2,27/42] md/md-bitmap: merge md_bitmap_end_sync() into bitmap_operations
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[md-6.12,v2,28/42] md/md-bitmap: merge md_bitmap_close_sync() into bitmap_operations
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[md-6.12,v2,29/42] md/md-bitmap: mrege md_bitmap_cond_end_sync() into bitmap_operations
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[md-6.12,v2,30/42] md/md-bitmap: merge md_bitmap_sync_with_cluster() into bitmap_operations
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[md-6.12,v2,31/42] md/md-bitmap: merge md_bitmap_unplug_async() into md_bitmap_unplug()
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[md-6.12,v2,32/42] md/md-bitmap: merge bitmap_unplug() into bitmap_operations
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[md-6.12,v2,33/42] md/md-bitmap: merge md_bitmap_daemon_work() into bitmap_operations
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[md-6.12,v2,34/42] md/md-bitmap: pass in mddev directly for md_bitmap_resize()
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[md-6.12,v2,35/42] md/md-bitmap: merge md_bitmap_resize() into bitmap_operations
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[md-6.12,v2,36/42] md/md-bitmap: merge get_bitmap_from_slot() into bitmap_operations
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[md-6.12,v2,37/42] md/md-bitmap: merge md_bitmap_copy_from_slot() into struct bitmap_operation.
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[md-6.12,v2,38/42] md/md-bitmap: merge md_bitmap_set_pages() into struct bitmap_operations
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[md-6.12,v2,39/42] md/md-bitmap: merge md_bitmap_free() into bitmap_operations
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[md-6.12,v2,40/42] md/md-bitmap: merge md_bitmap_wait_behind_writes() into bitmap_operations
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[md-6.12,v2,41/42] md/md-bitmap: merge md_bitmap_enabled() into bitmap_operations
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[md-6.12,v2,42/42] md/md-bitmap: make in memory structure internal
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From: Yu Kuai <yukuai3@huawei.com> Changes from RFC v1: - add patch 1-8 to prevent dereference bitmap directly, and the last patch to make bitmap structure internel; - use plain function alls "bitmap_ops->xxx()" directly; Changes from RFC v2: - some coding style; Changes from v1: - add patch 5 to fix __le64 conversion; - fix a problem in patch 34; The background is that currently bitmap is using a global spin_lock, causing lock contention and huge IO performance degradation for all raid levels. However, it's impossible to implement a new lock free bitmap with current situation that md-bitmap exposes the internal implementation with lots of exported apis. Hence bitmap_operations is invented, to describe bitmap core implementation, and a new bitmap can be introduced with a new bitmap_operations, we only need to switch to the new one during initialization. And with this we can build bitmap as kernel module, but that's not our concern for now. This version was tested with mdadm tests. There are still few failed tests in my VM, howerver, it's the test itself need to be fixed and we're working on it. Yu Kuai (42): md/raid1: use md_bitmap_wait_behind_writes() in raid1_read_request() md/md-bitmap: replace md_bitmap_status() with a new helper md_bitmap_get_stats() md: use new helper md_bitmap_get_stats() in update_array_info() md/md-bitmap: add 'events_cleared' into struct md_bitmap_stats md/md-cluster: fix spares warnings for __le64 md/md-bitmap: add 'sync_size' into struct md_bitmap_stats md/md-bitmap: add 'file_pages' into struct md_bitmap_stats md/md-bitmap: add 'behind_writes' and 'behind_wait' into struct md_bitmap_stats md/md-cluster: use helper md_bitmap_get_stats() to get pages in resize_bitmaps() md/md-bitmap: add a new helper md_bitmap_set_pages() md/md-bitmap: introduce struct bitmap_operations md/md-bitmap: simplify md_bitmap_create() + md_bitmap_load() md/md-bitmap: merge md_bitmap_create() into bitmap_operations md/md-bitmap: merge md_bitmap_load() into bitmap_operations md/md-bitmap: merge md_bitmap_destroy() into bitmap_operations md/md-bitmap: merge md_bitmap_flush() into bitmap_operations md/md-bitmap: make md_bitmap_print_sb() internal md/md-bitmap: merge md_bitmap_update_sb() into bitmap_operations md/md-bitmap: merge md_bitmap_status() into bitmap_operations md/md-bitmap: remove md_bitmap_setallbits() md/md-bitmap: merge bitmap_write_all() into bitmap_operations md/md-bitmap: merge md_bitmap_dirty_bits() into bitmap_operations md/md-bitmap: merge md_bitmap_startwrite() into bitmap_operations md/md-bitmap: merge md_bitmap_endwrite() into bitmap_operations md/md-bitmap: merge md_bitmap_start_sync() into bitmap_operations md/md-bitmap: remove the parameter 'aborted' for md_bitmap_end_sync() md/md-bitmap: merge md_bitmap_end_sync() into bitmap_operations md/md-bitmap: merge md_bitmap_close_sync() into bitmap_operations md/md-bitmap: mrege md_bitmap_cond_end_sync() into bitmap_operations md/md-bitmap: merge md_bitmap_sync_with_cluster() into bitmap_operations md/md-bitmap: merge md_bitmap_unplug_async() into md_bitmap_unplug() md/md-bitmap: merge bitmap_unplug() into bitmap_operations md/md-bitmap: merge md_bitmap_daemon_work() into bitmap_operations md/md-bitmap: pass in mddev directly for md_bitmap_resize() md/md-bitmap: merge md_bitmap_resize() into bitmap_operations md/md-bitmap: merge get_bitmap_from_slot() into bitmap_operations md/md-bitmap: merge md_bitmap_copy_from_slot() into struct bitmap_operation. md/md-bitmap: merge md_bitmap_set_pages() into struct bitmap_operations md/md-bitmap: merge md_bitmap_free() into bitmap_operations md/md-bitmap: merge md_bitmap_wait_behind_writes() into bitmap_operations md/md-bitmap: merge md_bitmap_enabled() into bitmap_operations md/md-bitmap: make in memory structure internal drivers/md/dm-raid.c | 7 +- drivers/md/md-bitmap.c | 568 +++++++++++++++++++++++++++++---------- drivers/md/md-bitmap.h | 268 ++++-------------- drivers/md/md-cluster.c | 91 ++++--- drivers/md/md.c | 155 +++++++---- drivers/md/md.h | 3 +- drivers/md/raid1-10.c | 9 +- drivers/md/raid1.c | 78 +++--- drivers/md/raid10.c | 73 ++--- drivers/md/raid5-cache.c | 8 +- drivers/md/raid5.c | 62 ++--- 11 files changed, 760 insertions(+), 562 deletions(-)