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https://github.com/schoebel/mars
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trans_logger: limit q0 length
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@ -57,6 +57,9 @@ EXPORT_SYMBOL_GPL(trans_logger_do_crc);
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int trans_logger_mem_usage; // in KB
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EXPORT_SYMBOL_GPL(trans_logger_mem_usage);
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int trans_logger_max_depth = 128;
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EXPORT_SYMBOL_GPL(trans_logger_max_depth);
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struct writeback_group global_writeback = {
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.lock = __RW_LOCK_UNLOCKED(global_writeback.lock),
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.group_anchor = LIST_HEAD_INIT(global_writeback.group_anchor),
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@ -655,7 +658,8 @@ int _write_ref_get(struct trans_logger_output *output, struct trans_logger_mref_
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// delay in case of too many master shadows / memory shortage
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wait_event_interruptible_timeout(brick->caller_event,
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!brick->delay_callers &&
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(brick_global_memlimit < 1024 || atomic64_read(&global_mshadow_used) / 1024 < brick_global_memlimit),
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(brick_global_memlimit < 1024 || atomic64_read(&global_mshadow_used) / 1024 < brick_global_memlimit) &&
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(trans_logger_max_depth <= 0 || atomic_read(&brick->q_phase[0].q_queued) < trans_logger_max_depth),
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HZ / 2);
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#endif
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@ -20,6 +20,7 @@
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extern int trans_logger_do_crc;
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extern int trans_logger_mem_usage; // in KB
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extern int trans_logger_max_depth;
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extern atomic_t global_mshadow_count;
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extern atomic64_t global_mshadow_used;
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@ -203,6 +203,7 @@ ctl_table mars_table[] = {
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INT_ENTRY("syslog_max_class", brick_say_syslog_max, 0600),
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INT_ENTRY("delay_say_on_overflow",delay_say_on_overflow, 0600),
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INT_ENTRY("mapfree_period_sec", mapfree_period_sec, 0600),
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INT_ENTRY("logger_max_depth", trans_logger_max_depth, 0600),
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INT_ENTRY("mem_limit_percent", mars_mem_percent, 0600),
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INT_ENTRY("logger_mem_used_kb", trans_logger_mem_usage, 0400),
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INT_ENTRY("mem_used_raw_kb", brick_global_block_used,0400),
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