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https://github.com/torvalds/linux
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c37511b863
The tracepoints were reworked to be more sensible, and fixed a null pointer deref in one of the tracepoints. Converted some of the pr_debug()s to tracepoints - this is partly a performance optimization; it used to be that with DEBUG or CONFIG_DYNAMIC_DEBUG pr_debug() was an empty macro; but at some point it was changed to an empty inline function. Some of the pr_debug() statements had rather expensive function calls as part of the arguments, so this code was getting run unnecessarily even on non debug kernels - in some fast paths, too. Signed-off-by: Kent Overstreet <koverstreet@google.com>
63 lines
1.5 KiB
C
63 lines
1.5 KiB
C
#ifndef _BCACHE_REQUEST_H_
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#define _BCACHE_REQUEST_H_
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#include <linux/cgroup.h>
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struct search {
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/* Stack frame for bio_complete */
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struct closure cl;
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struct bcache_device *d;
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struct task_struct *task;
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struct bbio bio;
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struct bio *orig_bio;
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struct bio *cache_miss;
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unsigned cache_bio_sectors;
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unsigned recoverable:1;
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unsigned unaligned_bvec:1;
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unsigned write:1;
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unsigned writeback:1;
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/* IO error returned to s->bio */
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short error;
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unsigned long start_time;
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/* Anything past op->keys won't get zeroed in do_bio_hook */
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struct btree_op op;
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};
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void bch_cache_read_endio(struct bio *, int);
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unsigned bch_get_congested(struct cache_set *);
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void bch_insert_data(struct closure *cl);
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void bch_btree_insert_async(struct closure *);
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void bch_cache_read_endio(struct bio *, int);
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void bch_open_buckets_free(struct cache_set *);
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int bch_open_buckets_alloc(struct cache_set *);
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void bch_cached_dev_request_init(struct cached_dev *dc);
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void bch_flash_dev_request_init(struct bcache_device *d);
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extern struct kmem_cache *bch_search_cache, *bch_passthrough_cache;
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struct bch_cgroup {
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#ifdef CONFIG_CGROUP_BCACHE
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struct cgroup_subsys_state css;
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#endif
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/*
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* We subtract one from the index into bch_cache_modes[], so that
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* default == -1; this makes it so the rest match up with d->cache_mode,
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* and we use d->cache_mode if cgrp->cache_mode < 0
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*/
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short cache_mode;
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bool verify;
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struct cache_stat_collector stats;
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};
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struct bch_cgroup *bch_bio_to_cgroup(struct bio *bio);
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#endif /* _BCACHE_REQUEST_H_ */
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