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locking: introduce prioritized_section
Introduce prioritized_section() as a closer match to previous logic of critical_section() that has been held over longer sequence of ioctl commands - essentially it's matching operation on a single cookie. While 'critical_section()' now corresponds to locked memory - we hold this memory only between suspend/resume thus notion of 'cookie' was lost. This patch restores some logic unintentionaly lost with dropping memory locking for just activation/deactivation calls.
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@ -1,5 +1,6 @@
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Version 2.02.178 -
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=====================================
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Add prioritized_section() to restore cookie boundaries (2.02.177).
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Enhance error messages when read error happens.
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Enhance mirror log initialization for old mirror target.
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Skip private crypto and stratis devices.
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@ -634,6 +634,11 @@ int critical_section(void)
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return _critical_section;
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}
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int prioritized_section(void)
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{
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return _priority_raised;
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}
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/*
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* The memlock_*_daemon functions will force the mlockall() call that we need
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* to stay in memory, but they will have no effect on device scans (unlike
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@ -34,6 +34,7 @@ struct cmd_context;
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void critical_section_inc(struct cmd_context *cmd, const char *reason);
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void critical_section_dec(struct cmd_context *cmd, const char *reason);
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int critical_section(void);
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int prioritized_section(void);
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void memlock_inc_daemon(struct cmd_context *cmd);
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void memlock_dec_daemon(struct cmd_context *cmd);
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int memlock_count_daemon(void);
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