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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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da415a096f
Deadlock happened because a foreground write slept, waiting for a bucket to be allocated. Normally the gc would mark buckets available for invalidation. But the moving_gc was stuck waiting for outstanding writes to complete. These writes used the bcache_wq, the same queue foreground writes used. This fix gives moving_gc its own work queue, so it was still finish moving even if foreground writes are stuck waiting for allocation. It also makes work queue a parameter to the data_insert path, so moving_gc can use its workqueue for writes. Signed-off-by: Nicholas Swenson <nks@daterainc.com> Signed-off-by: Kent Overstreet <kmo@daterainc.com>
62 lines
1.3 KiB
C
62 lines
1.3 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 data_insert_op {
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struct closure cl;
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struct cache_set *c;
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struct bio *bio;
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struct workqueue_struct *wq;
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unsigned inode;
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uint16_t write_point;
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uint16_t write_prio;
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short error;
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union {
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uint16_t flags;
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struct {
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unsigned bypass:1;
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unsigned writeback:1;
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unsigned flush_journal:1;
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unsigned csum:1;
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unsigned replace:1;
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unsigned replace_collision:1;
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unsigned insert_data_done:1;
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};
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};
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struct keylist insert_keys;
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BKEY_PADDED(replace_key);
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};
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unsigned bch_get_congested(struct cache_set *);
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void bch_data_insert(struct closure *cl);
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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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