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Differential D23110 Diff 66847 sys/geom/journal/g_journal.c

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sys/geom/journal/g_journal.c

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if (error != 0 || req->newptr == NULL) if (error != 0 || req->newptr == NULL)
return (error); return (error);
if (entries < 1 || entries > GJ_RECORD_HEADER_NENTRIES) if (entries < 1 || entries > GJ_RECORD_HEADER_NENTRIES)
return (EINVAL); return (EINVAL);
g_journal_record_entries = entries; g_journal_record_entries = entries;
return (0); return (0);
} }
SYSCTL_PROC(_kern_geom_journal, OID_AUTO, record_entries, SYSCTL_PROC(_kern_geom_journal, OID_AUTO, record_entries,
CTLTYPE_UINT | CTLFLAG_RW, NULL, 0, g_journal_record_entries_sysctl, "I", CTLTYPE_UINT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, NULL, 0,
g_journal_record_entries_sysctl, "I",
"Maximum number of entires in one journal record"); "Maximum number of entires in one journal record");
SYSCTL_UINT(_kern_geom_journal, OID_AUTO, optimize, CTLFLAG_RW, SYSCTL_UINT(_kern_geom_journal, OID_AUTO, optimize, CTLFLAG_RW,
&g_journal_do_optimize, 0, "Try to combine bios on flush and copy"); &g_journal_do_optimize, 0, "Try to combine bios on flush and copy");
static u_long g_journal_cache_used = 0; static u_long g_journal_cache_used = 0;
static u_long g_journal_cache_limit = 64 * 1024 * 1024; static u_long g_journal_cache_limit = 64 * 1024 * 1024;
static u_int g_journal_cache_divisor = 2; static u_int g_journal_cache_divisor = 2;
static u_int g_journal_cache_switch = 90; static u_int g_journal_cache_switch = 90;
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error = sysctl_handle_long(oidp, &limit, 0, req); error = sysctl_handle_long(oidp, &limit, 0, req);
if (error != 0 || req->newptr == NULL) if (error != 0 || req->newptr == NULL)
return (error); return (error);
g_journal_cache_limit = limit; g_journal_cache_limit = limit;
g_journal_cache_low = (limit / 100) * g_journal_cache_switch; g_journal_cache_low = (limit / 100) * g_journal_cache_switch;
return (0); return (0);
} }
SYSCTL_PROC(_kern_geom_journal_cache, OID_AUTO, limit, SYSCTL_PROC(_kern_geom_journal_cache, OID_AUTO, limit,
CTLTYPE_ULONG | CTLFLAG_RWTUN, NULL, 0, g_journal_cache_limit_sysctl, "I", CTLTYPE_ULONG | CTLFLAG_RWTUN | CTLFLAG_NEEDGIANT, NULL, 0,
g_journal_cache_limit_sysctl, "I",
"Maximum number of allocated bytes"); "Maximum number of allocated bytes");
SYSCTL_UINT(_kern_geom_journal_cache, OID_AUTO, divisor, CTLFLAG_RDTUN, SYSCTL_UINT(_kern_geom_journal_cache, OID_AUTO, divisor, CTLFLAG_RDTUN,
&g_journal_cache_divisor, 0, &g_journal_cache_divisor, 0,
"(kmem_size / kern.geom.journal.cache.divisor) == cache size"); "(kmem_size / kern.geom.journal.cache.divisor) == cache size");
static int static int
g_journal_cache_switch_sysctl(SYSCTL_HANDLER_ARGS) g_journal_cache_switch_sysctl(SYSCTL_HANDLER_ARGS)
{ {
u_int cswitch; u_int cswitch;
int error; int error;
cswitch = g_journal_cache_switch; cswitch = g_journal_cache_switch;
error = sysctl_handle_int(oidp, &cswitch, 0, req); error = sysctl_handle_int(oidp, &cswitch, 0, req);
if (error != 0 || req->newptr == NULL) if (error != 0 || req->newptr == NULL)
return (error); return (error);
if (cswitch > 100) if (cswitch > 100)
return (EINVAL); return (EINVAL);
g_journal_cache_switch = cswitch; g_journal_cache_switch = cswitch;
g_journal_cache_low = (g_journal_cache_limit / 100) * cswitch; g_journal_cache_low = (g_journal_cache_limit / 100) * cswitch;
return (0); return (0);
} }
SYSCTL_PROC(_kern_geom_journal_cache, OID_AUTO, switch, SYSCTL_PROC(_kern_geom_journal_cache, OID_AUTO, switch,
CTLTYPE_UINT | CTLFLAG_RW, NULL, 0, g_journal_cache_switch_sysctl, "I", CTLTYPE_UINT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, NULL, 0,
g_journal_cache_switch_sysctl, "I",
"Force switch when we hit this percent of cache use"); "Force switch when we hit this percent of cache use");
SYSCTL_UINT(_kern_geom_journal_cache, OID_AUTO, misses, CTLFLAG_RW, SYSCTL_UINT(_kern_geom_journal_cache, OID_AUTO, misses, CTLFLAG_RW,
&g_journal_cache_misses, 0, "Number of cache misses"); &g_journal_cache_misses, 0, "Number of cache misses");
SYSCTL_UINT(_kern_geom_journal_cache, OID_AUTO, alloc_failures, CTLFLAG_RW, SYSCTL_UINT(_kern_geom_journal_cache, OID_AUTO, alloc_failures, CTLFLAG_RW,
&g_journal_cache_alloc_failures, 0, "Memory allocation failures"); &g_journal_cache_alloc_failures, 0, "Memory allocation failures");
static u_long g_journal_stats_bytes_skipped = 0; static u_long g_journal_stats_bytes_skipped = 0;
static u_long g_journal_stats_combined_ios = 0; static u_long g_journal_stats_combined_ios = 0;
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