linux_dsm_epyc7002/drivers/md/bcache
Coly Li 125d98edd1 bcache: remove member accessed from struct btree
The member 'accessed' of struct btree is used in bch_mca_scan() when
shrinking btree node caches. The original idea is, if b->accessed is
set, clean it and look at next btree node cache from c->btree_cache
list, and only shrink the caches whose b->accessed is cleaned. Then
only cold btree node cache will be shrunk.

But when I/O pressure is high, it is very probably that b->accessed
of a btree node cache will be set again in bch_btree_node_get()
before bch_mca_scan() selects it again. Then there is no chance for
bch_mca_scan() to shrink enough memory back to slub or slab system.

This patch removes member accessed from struct btree, then once a
btree node ache is selected, it will be immediately shunk. By this
change, bch_mca_scan() may release btree node cahce more efficiently.

Signed-off-by: Coly Li <colyli@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-01-23 11:40:02 -07:00
..
alloc.c bcache: fix deadlock in bcache_allocator 2019-11-13 15:42:50 -07:00
bcache.h bcache: store a pointer to the on-disk sb in the cache and cached_dev structures 2020-01-23 11:40:01 -07:00
bset.c bcache: add code comments for state->pool in __btree_sort() 2020-01-23 11:40:02 -07:00
bset.h bcache: fix stack corruption by PRECEDING_KEY() 2019-06-13 03:09:14 -06:00
btree.c bcache: remove member accessed from struct btree 2020-01-23 11:40:02 -07:00
btree.h bcache: remove member accessed from struct btree 2020-01-23 11:40:02 -07:00
closure.c bcache: don't export symbols 2019-11-13 15:42:51 -07:00
closure.h bcache: fix typo in code comments of closure_return_with_destructor() 2018-10-08 08:19:43 -06:00
debug.c bcache: Fix an error code in bch_dump_read() 2019-09-03 08:08:29 -06:00
debug.h bcache: add identifier names to arguments of function definitions 2018-08-11 15:46:41 -06:00
extents.c bcache: treat stale && dirty keys as bad keys 2019-02-09 07:18:31 -07:00
extents.h bcache: add identifier names to arguments of function definitions 2018-08-11 15:46:41 -06:00
io.c bcache: ignore read-ahead request failure on backing device 2019-06-28 07:39:14 -06:00
journal.c bcache: avoid unnecessary btree nodes flushing in btree_flush_write() 2020-01-23 11:40:02 -07:00
journal.h Revert "bcache: fix fifo index swapping condition in journal_pin_cmp()" 2019-11-18 08:35:47 -07:00
Kconfig treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
Makefile bcache: remove the extra cflags for request.o 2019-11-13 15:42:50 -07:00
movinggc.c bcache: style fix to add a blank line after declarations 2018-08-11 15:46:41 -06:00
request.c bcache: deleted code comments for dead code in bch_data_insert_keys() 2019-11-13 15:42:50 -07:00
request.h bcache: Clean up bch_get_congested() 2019-04-24 10:56:27 -06:00
stats.c bcache: not use hard coded memset size in bch_cache_accounting_clear() 2019-02-09 07:18:31 -07:00
stats.h bcache: add identifier names to arguments of function definitions 2018-08-11 15:46:41 -06:00
super.c bcache: use read_cache_page_gfp to read the superblock 2020-01-23 11:40:01 -07:00
sysfs.c bcache: add idle_max_writeback_rate sysfs interface 2019-11-13 15:42:50 -07:00
sysfs.h bcache: add sysfs_strtoul_bool() for setting bit-field variables 2019-02-09 07:18:32 -07:00
trace.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
util.c bcache: avoid to use bio_for_each_segment_all() in bch_bio_alloc_pages() 2019-02-15 08:40:11 -07:00
util.h bcache: Revert "bcache: fix high CPU occupancy during journal" 2019-06-28 07:39:17 -06:00
writeback.c bcache: add idle_max_writeback_rate sysfs interface 2019-11-13 15:42:50 -07:00
writeback.h bcache: never writeback a discard operation 2019-02-09 07:18:31 -07:00