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author | John Baldwin <jhb@FreeBSD.org> | 2015-05-22 11:09:41 +0000 |
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committer | John Baldwin <jhb@FreeBSD.org> | 2015-05-22 11:09:41 +0000 |
commit | 21119d0641ba50a2edf20ed96101e52cae7457c5 (patch) | |
tree | c39d0f53b2a12a933d8ef9fb2a5b2676928ff904 /sys/kern/kern_ktr.c | |
parent | c209e3e2e6e00b30c991764ca28c5dac26f023fc (diff) | |
download | src-21119d0641ba50a2edf20ed96101e52cae7457c5.tar.gz src-21119d0641ba50a2edf20ed96101e52cae7457c5.zip |
Expand ktr_mask to be a 64-bit unsigned integer.
The mask does not really need to be updated with atomic operations and
the downside of losing races during transitions is not great (it is
not marked volatile, so those races are pretty wide open as it is).
Differential Revision: https://reviews.freebsd.org/D2595
Reviewed by: emaste, neel, rpaulo
MFC after: 2 weeks
Notes
Notes:
svn path=/head/; revision=283283
Diffstat (limited to 'sys/kern/kern_ktr.c')
-rw-r--r-- | sys/kern/kern_ktr.c | 26 |
1 files changed, 14 insertions, 12 deletions
diff --git a/sys/kern/kern_ktr.c b/sys/kern/kern_ktr.c index 2a405936320d..32ded48465a9 100644 --- a/sys/kern/kern_ktr.c +++ b/sys/kern/kern_ktr.c @@ -96,8 +96,8 @@ static MALLOC_DEFINE(M_KTR, "KTR", "KTR"); FEATURE(ktr, "Kernel support for KTR kernel tracing facility"); volatile int ktr_idx = 0; -int ktr_mask = KTR_MASK; -int ktr_compile = KTR_COMPILE; +uint64_t ktr_mask = KTR_MASK; +uint64_t ktr_compile = KTR_COMPILE; int ktr_entries = KTR_BOOT_ENTRIES; int ktr_version = KTR_VERSION; struct ktr_entry ktr_buf_init[KTR_BOOT_ENTRIES]; @@ -109,7 +109,7 @@ static SYSCTL_NODE(_debug, OID_AUTO, ktr, CTLFLAG_RD, 0, "KTR options"); SYSCTL_INT(_debug_ktr, OID_AUTO, version, CTLFLAG_RD, &ktr_version, 0, "Version of the KTR interface"); -SYSCTL_UINT(_debug_ktr, OID_AUTO, compile, CTLFLAG_RD, +SYSCTL_UQUAD(_debug_ktr, OID_AUTO, compile, CTLFLAG_RD, &ktr_compile, 0, "Bitmask of KTR event classes compiled into the kernel"); static int @@ -162,18 +162,19 @@ SYSCTL_PROC(_debug_ktr, OID_AUTO, clear, CTLTYPE_INT|CTLFLAG_RW, 0, 0, static int sysctl_debug_ktr_mask(SYSCTL_HANDLER_ARGS) { - int mask, error; + uint64_t mask; + int error; mask = ktr_mask; - error = sysctl_handle_int(oidp, &mask, 0, req); + error = sysctl_handle_64(oidp, &mask, 0, req); if (error || !req->newptr) return (error); ktr_mask = mask; return (error); } -SYSCTL_PROC(_debug_ktr, OID_AUTO, mask, CTLTYPE_UINT|CTLFLAG_RWTUN, 0, 0, - sysctl_debug_ktr_mask, "IU", +SYSCTL_PROC(_debug_ktr, OID_AUTO, mask, CTLTYPE_U64 | CTLFLAG_RWTUN, 0, 0, + sysctl_debug_ktr_mask, "QU", "Bitmask of KTR event classes for which logging is enabled"); #if KTR_ENTRIES > KTR_BOOT_ENTRIES @@ -184,7 +185,7 @@ SYSCTL_PROC(_debug_ktr, OID_AUTO, mask, CTLTYPE_UINT|CTLFLAG_RWTUN, 0, 0, static void ktr_entries_initializer(void *dummy __unused) { - int mask; + uint64_t mask; /* Temporarily disable ktr in case malloc() is being traced. */ mask = ktr_mask; @@ -208,7 +209,8 @@ SYSINIT(ktr_entries_initializer, SI_SUB_KMEM, SI_ORDER_ANY, static int sysctl_debug_ktr_entries(SYSCTL_HANDLER_ARGS) { - int entries, error, mask; + uint64_t mask; + int entries, error; struct ktr_entry *buf, *oldbuf; entries = ktr_entries; @@ -219,7 +221,7 @@ sysctl_debug_ktr_entries(SYSCTL_HANDLER_ARGS) return (ERANGE); /* Disable ktr temporarily. */ mask = ktr_mask; - atomic_store_rel_int(&ktr_mask, 0); + ktr_mask = 0; /* Wait for threads to go idle. */ if ((error = quiesce_all_cpus("ktrent", PCATCH)) != 0) { ktr_mask = mask; @@ -235,7 +237,7 @@ sysctl_debug_ktr_entries(SYSCTL_HANDLER_ARGS) ktr_buf = buf; ktr_entries = entries; ktr_idx = 0; - atomic_store_rel_int(&ktr_mask, mask); + ktr_mask = mask; if (oldbuf != NULL) free(oldbuf, M_KTR); @@ -310,7 +312,7 @@ SYSCTL_PROC(_debug_ktr, OID_AUTO, alq_enable, #endif void -ktr_tracepoint(u_int mask, const char *file, int line, const char *format, +ktr_tracepoint(uint64_t mask, const char *file, int line, const char *format, u_long arg1, u_long arg2, u_long arg3, u_long arg4, u_long arg5, u_long arg6) { |