* [PATCH 1/2] ratelimit: add initialization macro @ 2014-08-20 12:54 Dmitry Monakhov 2014-08-20 12:54 ` [PATCH 2/2] fault-inject: add ratelimit option Dmitry Monakhov 2014-10-19 9:06 ` [PATCH 1/2] ratelimit: add initialization macro Dmitry Monakhov 0 siblings, 2 replies; 7+ messages in thread From: Dmitry Monakhov @ 2014-08-20 12:54 UTC (permalink / raw) To: linux-kernel; +Cc: akinobu.mita, Dmitry Monakhov Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org> --- include/linux/ratelimit.h | 12 +++++++++--- 1 files changed, 9 insertions(+), 3 deletions(-) diff --git a/include/linux/ratelimit.h b/include/linux/ratelimit.h index 0a260d8..1810252 100644 --- a/include/linux/ratelimit.h +++ b/include/linux/ratelimit.h @@ -17,14 +17,20 @@ struct ratelimit_state { unsigned long begin; }; -#define DEFINE_RATELIMIT_STATE(name, interval_init, burst_init) \ - \ - struct ratelimit_state name = { \ +#define RATELIMIT_STATE_INIT(name, interval_init, burst_init) { \ .lock = __RAW_SPIN_LOCK_UNLOCKED(name.lock), \ .interval = interval_init, \ .burst = burst_init, \ } +#define RATELIMIT_STATE_INIT_DISABLED \ + RATELIMIT_STATE_INIT(ratelimit_state, 0, DEFAULT_RATELIMIT_BURST) + +#define DEFINE_RATELIMIT_STATE(name, interval_init, burst_init) \ + \ + struct ratelimit_state name = \ + RATELIMIT_STATE_INIT(name, interval_init, burst_init) \ + static inline void ratelimit_state_init(struct ratelimit_state *rs, int interval, int burst) { -- 1.7.1 ^ permalink raw reply related [flat|nested] 7+ messages in thread
* [PATCH 2/2] fault-inject: add ratelimit option 2014-08-20 12:54 [PATCH 1/2] ratelimit: add initialization macro Dmitry Monakhov @ 2014-08-20 12:54 ` Dmitry Monakhov 2014-08-20 14:20 ` Akinobu Mita 2014-10-19 9:06 ` [PATCH 1/2] ratelimit: add initialization macro Dmitry Monakhov 1 sibling, 1 reply; 7+ messages in thread From: Dmitry Monakhov @ 2014-08-20 12:54 UTC (permalink / raw) To: linux-kernel; +Cc: akinobu.mita, Dmitry Monakhov Current debug levels are not optimal. Especially if one want to provoke big numbers of faults(broken device simulator) then any verbose level will produce giant numbers of identical logging messages. Let's add ratelimit parameter for that purpose. Change-log: - Dump fault_attr configuration on minimal verbose level. - Add name to fault_attr - Add ratelimit parameter Example: # Limit verbosity to one at 5 seconds echo 1 > /sys/kernel/debug/fail_make_request/verbose_ratelimit_burst echo 5000 > /sys/kernel/debug/fail_make_request/verbose_ratelimit_interval_ms # dump only once in a day echo 1 > /sys/kernel/debug/fail_make_request/verbose_ratelimit_burst echo $((24 * 60 * 60* 1000)) > /sys/kernel/debug/fail_make_request/verbose_ratelimit_interval_ms Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org> --- include/linux/fault-inject.h | 17 +++++++++++------ lib/fault-inject.c | 30 ++++++++++++++++++++++++++---- 2 files changed, 37 insertions(+), 10 deletions(-) diff --git a/include/linux/fault-inject.h b/include/linux/fault-inject.h index c6f996f..798fad9 100644 --- a/include/linux/fault-inject.h +++ b/include/linux/fault-inject.h @@ -5,6 +5,7 @@ #include <linux/types.h> #include <linux/debugfs.h> +#include <linux/ratelimit.h> #include <linux/atomic.h> /* @@ -25,14 +26,18 @@ struct fault_attr { unsigned long reject_end; unsigned long count; + struct ratelimit_state ratelimit_state; + struct dentry *dname; }; -#define FAULT_ATTR_INITIALIZER { \ - .interval = 1, \ - .times = ATOMIC_INIT(1), \ - .require_end = ULONG_MAX, \ - .stacktrace_depth = 32, \ - .verbose = 2, \ +#define FAULT_ATTR_INITIALIZER { \ + .interval = 1, \ + .times = ATOMIC_INIT(1), \ + .require_end = ULONG_MAX, \ + .stacktrace_depth = 32, \ + .ratelimit_state = RATELIMIT_STATE_INIT_DISABLED, \ + .verbose = 2, \ + .dname = NULL, \ } #define DECLARE_FAULT_ATTR(name) struct fault_attr name = FAULT_ATTR_INITIALIZER diff --git a/lib/fault-inject.c b/lib/fault-inject.c index d7d501e..ebb3485 100644 --- a/lib/fault-inject.c +++ b/lib/fault-inject.c @@ -40,10 +40,25 @@ EXPORT_SYMBOL_GPL(setup_fault_attr); static void fail_dump(struct fault_attr *attr) { - if (attr->verbose > 0) - printk(KERN_NOTICE "FAULT_INJECTION: forcing a failure\n"); - if (attr->verbose > 1) - dump_stack(); + if (attr->verbose > 0 && + ___ratelimit(&attr->ratelimit_state, __func__)) { + if (attr->dname) + printk(KERN_NOTICE "FAULT_INJECTION: forcing a failure." + "name %pd, interval %lu, probability %lu, " + "space %d, times %d\n", attr->dname, + attr->probability, attr->interval, + atomic_read(&attr->space), + atomic_read(&attr->times)); + else + printk(KERN_NOTICE "FAULT_INJECTION: forcing a " + "failure, interval %lu, probability %lu, " + "space %d, times %d\n", attr->probability, + attr->interval, atomic_read(&attr->space), + atomic_read(&attr->times)); + + if (attr->verbose > 1) + dump_stack(); + } } #define atomic_dec_not_zero(v) atomic_add_unless((v), -1, 0) @@ -202,6 +217,12 @@ struct dentry *fault_create_debugfs_attr(const char *name, goto fail; if (!debugfs_create_ul("verbose", mode, dir, &attr->verbose)) goto fail; + if (!debugfs_create_u32("verbose_ratelimit_interval_ms", mode, dir, + &attr->ratelimit_state.interval)) + goto fail; + if (!debugfs_create_u32("verbose_ratelimit_burst", mode, dir, + &attr->ratelimit_state.burst)) + goto fail; if (!debugfs_create_bool("task-filter", mode, dir, &attr->task_filter)) goto fail; @@ -222,6 +243,7 @@ struct dentry *fault_create_debugfs_attr(const char *name, #endif /* CONFIG_FAULT_INJECTION_STACKTRACE_FILTER */ + attr->dname = dget(dir); return dir; fail: debugfs_remove_recursive(dir); -- 1.7.1 ^ permalink raw reply related [flat|nested] 7+ messages in thread
* Re: [PATCH 2/2] fault-inject: add ratelimit option 2014-08-20 12:54 ` [PATCH 2/2] fault-inject: add ratelimit option Dmitry Monakhov @ 2014-08-20 14:20 ` Akinobu Mita 2014-08-20 14:36 ` Dmitry Monakhov 0 siblings, 1 reply; 7+ messages in thread From: Akinobu Mita @ 2014-08-20 14:20 UTC (permalink / raw) To: Dmitry Monakhov; +Cc: LKML 2014-08-20 21:54 GMT+09:00 Dmitry Monakhov <dmonakhov@openvz.org>: > @@ -40,10 +40,25 @@ EXPORT_SYMBOL_GPL(setup_fault_attr); > > static void fail_dump(struct fault_attr *attr) > { > - if (attr->verbose > 0) > - printk(KERN_NOTICE "FAULT_INJECTION: forcing a failure\n"); > - if (attr->verbose > 1) > - dump_stack(); > + if (attr->verbose > 0 && > + ___ratelimit(&attr->ratelimit_state, __func__)) { You can use __ratelimit(state) instead of ___ratelimit(state, __func__). > + if (attr->dname) > + printk(KERN_NOTICE "FAULT_INJECTION: forcing a failure." > + "name %pd, interval %lu, probability %lu, " > + "space %d, times %d\n", attr->dname, > + attr->probability, attr->interval, > + atomic_read(&attr->space), > + atomic_read(&attr->times)); > + else > + printk(KERN_NOTICE "FAULT_INJECTION: forcing a " > + "failure, interval %lu, probability %lu, " > + "space %d, times %d\n", attr->probability, > + attr->interval, atomic_read(&attr->space), > + atomic_read(&attr->times)); This looks a bit redundant. NULL pointer to "%pd" format produces "(null)" string, so this printk and if-else can be removed. Also, this message line is a bit longer than usual kernel message. Should we put '\n' after "forcing a failure."? This patch looks good to me. Please feel free to add my ACK. ^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH 2/2] fault-inject: add ratelimit option 2014-08-20 14:20 ` Akinobu Mita @ 2014-08-20 14:36 ` Dmitry Monakhov 2014-10-19 9:07 ` Dmitry Monakhov 0 siblings, 1 reply; 7+ messages in thread From: Dmitry Monakhov @ 2014-08-20 14:36 UTC (permalink / raw) To: Akinobu Mita; +Cc: LKML [-- Attachment #1: Type: text/plain, Size: 429 bytes --] On Wed, 20 Aug 2014 23:20:18 +0900, Akinobu Mita <akinobu.mita@gmail.com> wrote: > This looks a bit redundant. NULL pointer to "%pd" format produces > "(null)" string, so this printk and if-else can be removed. > > Also, this message line is a bit longer than usual kernel message. > Should we put '\n' after "forcing a failure."? > > This patch looks good to me. Please feel free to add my ACK. Ok. Here is updated version. [-- Warning: decoded text below may be mangled, UTF-8 assumed --] [-- Attachment #2: 0001-fault-inject-add-ratelimit-option-v2.patch --] [-- Type: text/x-patch, Size: 3836 bytes --] >From d06acefdd4da0d590e6dc0b1351e7adefad98fc7 Mon Sep 17 00:00:00 2001 From: Dmitry Monakhov <dmonakhov@openvz.org> Date: Wed, 20 Aug 2014 18:31:06 +0400 Subject: [PATCH] fault-inject: add ratelimit option v2 Current debug levels are not optimal. Especially if one want to provoke big numbers of faults(broken device simulator) then any verbose level will produce giant numbers of identical logging messages. Let's add ratelimit parameter for that purpose. Change-log: - Dump fault_attr configuration on minimal verbose level. - Add name to fault_attr - Add ratelimit parameter Example: # Limit verbosity to one at 5 seconds echo 1 > /sys/kernel/debug/fail_make_request/verbose_ratelimit_burst echo 5000 > /sys/kernel/debug/fail_make_request/verbose_ratelimit_interval_ms # dump only once in a day echo 1 > /sys/kernel/debug/fail_make_request/verbose_ratelimit_burst echo $((24 * 60 * 60* 1000)) > /sys/kernel/debug/fail_make_request/verbose_ratelimit_interval_ms Acked-by: Akinobu Mita <akinobu.mita@gmail.com> Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org> --- include/linux/fault-inject.h | 17 +++++++++++------ lib/fault-inject.c | 21 +++++++++++++++++---- 2 files changed, 28 insertions(+), 10 deletions(-) diff --git a/include/linux/fault-inject.h b/include/linux/fault-inject.h index c6f996f..798fad9 100644 --- a/include/linux/fault-inject.h +++ b/include/linux/fault-inject.h @@ -5,6 +5,7 @@ #include <linux/types.h> #include <linux/debugfs.h> +#include <linux/ratelimit.h> #include <linux/atomic.h> /* @@ -25,14 +26,18 @@ struct fault_attr { unsigned long reject_end; unsigned long count; + struct ratelimit_state ratelimit_state; + struct dentry *dname; }; -#define FAULT_ATTR_INITIALIZER { \ - .interval = 1, \ - .times = ATOMIC_INIT(1), \ - .require_end = ULONG_MAX, \ - .stacktrace_depth = 32, \ - .verbose = 2, \ +#define FAULT_ATTR_INITIALIZER { \ + .interval = 1, \ + .times = ATOMIC_INIT(1), \ + .require_end = ULONG_MAX, \ + .stacktrace_depth = 32, \ + .ratelimit_state = RATELIMIT_STATE_INIT_DISABLED, \ + .verbose = 2, \ + .dname = NULL, \ } #define DECLARE_FAULT_ATTR(name) struct fault_attr name = FAULT_ATTR_INITIALIZER diff --git a/lib/fault-inject.c b/lib/fault-inject.c index d7d501e..f1cdeb0 100644 --- a/lib/fault-inject.c +++ b/lib/fault-inject.c @@ -40,10 +40,16 @@ EXPORT_SYMBOL_GPL(setup_fault_attr); static void fail_dump(struct fault_attr *attr) { - if (attr->verbose > 0) - printk(KERN_NOTICE "FAULT_INJECTION: forcing a failure\n"); - if (attr->verbose > 1) - dump_stack(); + if (attr->verbose > 0 && __ratelimit(&attr->ratelimit_state)) { + printk(KERN_NOTICE "FAULT_INJECTION: forcing a failure.\n" + "name %pd, interval %lu, probability %lu, " + "space %d, times %d\n", attr->dname, + attr->probability, attr->interval, + atomic_read(&attr->space), + atomic_read(&attr->times)); + if (attr->verbose > 1) + dump_stack(); + } } #define atomic_dec_not_zero(v) atomic_add_unless((v), -1, 0) @@ -202,6 +208,12 @@ struct dentry *fault_create_debugfs_attr(const char *name, goto fail; if (!debugfs_create_ul("verbose", mode, dir, &attr->verbose)) goto fail; + if (!debugfs_create_u32("verbose_ratelimit_interval_ms", mode, dir, + &attr->ratelimit_state.interval)) + goto fail; + if (!debugfs_create_u32("verbose_ratelimit_burst", mode, dir, + &attr->ratelimit_state.burst)) + goto fail; if (!debugfs_create_bool("task-filter", mode, dir, &attr->task_filter)) goto fail; @@ -222,6 +234,7 @@ struct dentry *fault_create_debugfs_attr(const char *name, #endif /* CONFIG_FAULT_INJECTION_STACKTRACE_FILTER */ + attr->dname = dget(dir); return dir; fail: debugfs_remove_recursive(dir); -- 1.7.1 ^ permalink raw reply related [flat|nested] 7+ messages in thread
* Re: [PATCH 2/2] fault-inject: add ratelimit option 2014-08-20 14:36 ` Dmitry Monakhov @ 2014-10-19 9:07 ` Dmitry Monakhov 2014-10-19 12:17 ` Akinobu Mita 0 siblings, 1 reply; 7+ messages in thread From: Dmitry Monakhov @ 2014-10-19 9:07 UTC (permalink / raw) To: Akinobu Mita; +Cc: LKML [-- Attachment #1: Type: text/plain, Size: 4680 bytes --] Dmitry Monakhov <dmonakhov@openvz.org> writes: Ping. > On Wed, 20 Aug 2014 23:20:18 +0900, Akinobu Mita <akinobu.mita@gmail.com> wrote: >> This looks a bit redundant. NULL pointer to "%pd" format produces >> "(null)" string, so this printk and if-else can be removed. >> >> Also, this message line is a bit longer than usual kernel message. >> Should we put '\n' after "forcing a failure."? >> >> This patch looks good to me. Please feel free to add my ACK. > Ok. Here is updated version. > From d06acefdd4da0d590e6dc0b1351e7adefad98fc7 Mon Sep 17 00:00:00 2001 > From: Dmitry Monakhov <dmonakhov@openvz.org> > Date: Wed, 20 Aug 2014 18:31:06 +0400 > Subject: [PATCH] fault-inject: add ratelimit option v2 > > Current debug levels are not optimal. Especially if one want to > provoke big numbers of faults(broken device simulator) then any verbose > level will produce giant numbers of identical logging messages. > Let's add ratelimit parameter for that purpose. > > Change-log: > - Dump fault_attr configuration on minimal verbose level. > - Add name to fault_attr > - Add ratelimit parameter > > Example: > # Limit verbosity to one at 5 seconds > echo 1 > /sys/kernel/debug/fail_make_request/verbose_ratelimit_burst > echo 5000 > /sys/kernel/debug/fail_make_request/verbose_ratelimit_interval_ms > > # dump only once in a day > echo 1 > /sys/kernel/debug/fail_make_request/verbose_ratelimit_burst > echo $((24 * 60 * 60* 1000)) > /sys/kernel/debug/fail_make_request/verbose_ratelimit_interval_ms > > Acked-by: Akinobu Mita <akinobu.mita@gmail.com> > Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org> > --- > include/linux/fault-inject.h | 17 +++++++++++------ > lib/fault-inject.c | 21 +++++++++++++++++---- > 2 files changed, 28 insertions(+), 10 deletions(-) > > diff --git a/include/linux/fault-inject.h b/include/linux/fault-inject.h > index c6f996f..798fad9 100644 > --- a/include/linux/fault-inject.h > +++ b/include/linux/fault-inject.h > @@ -5,6 +5,7 @@ > > #include <linux/types.h> > #include <linux/debugfs.h> > +#include <linux/ratelimit.h> > #include <linux/atomic.h> > > /* > @@ -25,14 +26,18 @@ struct fault_attr { > unsigned long reject_end; > > unsigned long count; > + struct ratelimit_state ratelimit_state; > + struct dentry *dname; > }; > > -#define FAULT_ATTR_INITIALIZER { \ > - .interval = 1, \ > - .times = ATOMIC_INIT(1), \ > - .require_end = ULONG_MAX, \ > - .stacktrace_depth = 32, \ > - .verbose = 2, \ > +#define FAULT_ATTR_INITIALIZER { \ > + .interval = 1, \ > + .times = ATOMIC_INIT(1), \ > + .require_end = ULONG_MAX, \ > + .stacktrace_depth = 32, \ > + .ratelimit_state = RATELIMIT_STATE_INIT_DISABLED, \ > + .verbose = 2, \ > + .dname = NULL, \ > } > > #define DECLARE_FAULT_ATTR(name) struct fault_attr name = FAULT_ATTR_INITIALIZER > diff --git a/lib/fault-inject.c b/lib/fault-inject.c > index d7d501e..f1cdeb0 100644 > --- a/lib/fault-inject.c > +++ b/lib/fault-inject.c > @@ -40,10 +40,16 @@ EXPORT_SYMBOL_GPL(setup_fault_attr); > > static void fail_dump(struct fault_attr *attr) > { > - if (attr->verbose > 0) > - printk(KERN_NOTICE "FAULT_INJECTION: forcing a failure\n"); > - if (attr->verbose > 1) > - dump_stack(); > + if (attr->verbose > 0 && __ratelimit(&attr->ratelimit_state)) { > + printk(KERN_NOTICE "FAULT_INJECTION: forcing a failure.\n" > + "name %pd, interval %lu, probability %lu, " > + "space %d, times %d\n", attr->dname, > + attr->probability, attr->interval, > + atomic_read(&attr->space), > + atomic_read(&attr->times)); > + if (attr->verbose > 1) > + dump_stack(); > + } > } > > #define atomic_dec_not_zero(v) atomic_add_unless((v), -1, 0) > @@ -202,6 +208,12 @@ struct dentry *fault_create_debugfs_attr(const char *name, > goto fail; > if (!debugfs_create_ul("verbose", mode, dir, &attr->verbose)) > goto fail; > + if (!debugfs_create_u32("verbose_ratelimit_interval_ms", mode, dir, > + &attr->ratelimit_state.interval)) > + goto fail; > + if (!debugfs_create_u32("verbose_ratelimit_burst", mode, dir, > + &attr->ratelimit_state.burst)) > + goto fail; > if (!debugfs_create_bool("task-filter", mode, dir, &attr->task_filter)) > goto fail; > > @@ -222,6 +234,7 @@ struct dentry *fault_create_debugfs_attr(const char *name, > > #endif /* CONFIG_FAULT_INJECTION_STACKTRACE_FILTER */ > > + attr->dname = dget(dir); > return dir; > fail: > debugfs_remove_recursive(dir); > -- > 1.7.1 [-- Attachment #2: Type: application/pgp-signature, Size: 818 bytes --] ^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH 2/2] fault-inject: add ratelimit option 2014-10-19 9:07 ` Dmitry Monakhov @ 2014-10-19 12:17 ` Akinobu Mita 0 siblings, 0 replies; 7+ messages in thread From: Akinobu Mita @ 2014-10-19 12:17 UTC (permalink / raw) To: Dmitry Monakhov; +Cc: LKML, Andrew Morton Hi Dmitry, 2014-10-19 18:07 GMT+09:00 Dmitry Monakhov <dmonakhov@openvz.org>: > Dmitry Monakhov <dmonakhov@openvz.org> writes: > Ping. Could you resend this series with CCing Andrew for asking -mm tree inclusion? >> On Wed, 20 Aug 2014 23:20:18 +0900, Akinobu Mita <akinobu.mita@gmail.com> wrote: >>> This looks a bit redundant. NULL pointer to "%pd" format produces >>> "(null)" string, so this printk and if-else can be removed. >>> >>> Also, this message line is a bit longer than usual kernel message. >>> Should we put '\n' after "forcing a failure."? >>> >>> This patch looks good to me. Please feel free to add my ACK. >> Ok. Here is updated version. >> From d06acefdd4da0d590e6dc0b1351e7adefad98fc7 Mon Sep 17 00:00:00 2001 >> From: Dmitry Monakhov <dmonakhov@openvz.org> >> Date: Wed, 20 Aug 2014 18:31:06 +0400 >> Subject: [PATCH] fault-inject: add ratelimit option v2 >> >> Current debug levels are not optimal. Especially if one want to >> provoke big numbers of faults(broken device simulator) then any verbose >> level will produce giant numbers of identical logging messages. >> Let's add ratelimit parameter for that purpose. >> >> Change-log: >> - Dump fault_attr configuration on minimal verbose level. >> - Add name to fault_attr >> - Add ratelimit parameter >> >> Example: >> # Limit verbosity to one at 5 seconds >> echo 1 > /sys/kernel/debug/fail_make_request/verbose_ratelimit_burst >> echo 5000 > /sys/kernel/debug/fail_make_request/verbose_ratelimit_interval_ms >> >> # dump only once in a day >> echo 1 > /sys/kernel/debug/fail_make_request/verbose_ratelimit_burst >> echo $((24 * 60 * 60* 1000)) > /sys/kernel/debug/fail_make_request/verbose_ratelimit_interval_ms >> >> Acked-by: Akinobu Mita <akinobu.mita@gmail.com> >> Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org> >> --- >> include/linux/fault-inject.h | 17 +++++++++++------ >> lib/fault-inject.c | 21 +++++++++++++++++---- >> 2 files changed, 28 insertions(+), 10 deletions(-) >> >> diff --git a/include/linux/fault-inject.h b/include/linux/fault-inject.h >> index c6f996f..798fad9 100644 >> --- a/include/linux/fault-inject.h >> +++ b/include/linux/fault-inject.h >> @@ -5,6 +5,7 @@ >> >> #include <linux/types.h> >> #include <linux/debugfs.h> >> +#include <linux/ratelimit.h> >> #include <linux/atomic.h> >> >> /* >> @@ -25,14 +26,18 @@ struct fault_attr { >> unsigned long reject_end; >> >> unsigned long count; >> + struct ratelimit_state ratelimit_state; >> + struct dentry *dname; >> }; >> >> -#define FAULT_ATTR_INITIALIZER { \ >> - .interval = 1, \ >> - .times = ATOMIC_INIT(1), \ >> - .require_end = ULONG_MAX, \ >> - .stacktrace_depth = 32, \ >> - .verbose = 2, \ >> +#define FAULT_ATTR_INITIALIZER { \ >> + .interval = 1, \ >> + .times = ATOMIC_INIT(1), \ >> + .require_end = ULONG_MAX, \ >> + .stacktrace_depth = 32, \ >> + .ratelimit_state = RATELIMIT_STATE_INIT_DISABLED, \ >> + .verbose = 2, \ >> + .dname = NULL, \ >> } >> >> #define DECLARE_FAULT_ATTR(name) struct fault_attr name = FAULT_ATTR_INITIALIZER >> diff --git a/lib/fault-inject.c b/lib/fault-inject.c >> index d7d501e..f1cdeb0 100644 >> --- a/lib/fault-inject.c >> +++ b/lib/fault-inject.c >> @@ -40,10 +40,16 @@ EXPORT_SYMBOL_GPL(setup_fault_attr); >> >> static void fail_dump(struct fault_attr *attr) >> { >> - if (attr->verbose > 0) >> - printk(KERN_NOTICE "FAULT_INJECTION: forcing a failure\n"); >> - if (attr->verbose > 1) >> - dump_stack(); >> + if (attr->verbose > 0 && __ratelimit(&attr->ratelimit_state)) { >> + printk(KERN_NOTICE "FAULT_INJECTION: forcing a failure.\n" >> + "name %pd, interval %lu, probability %lu, " >> + "space %d, times %d\n", attr->dname, >> + attr->probability, attr->interval, >> + atomic_read(&attr->space), >> + atomic_read(&attr->times)); >> + if (attr->verbose > 1) >> + dump_stack(); >> + } >> } >> >> #define atomic_dec_not_zero(v) atomic_add_unless((v), -1, 0) >> @@ -202,6 +208,12 @@ struct dentry *fault_create_debugfs_attr(const char *name, >> goto fail; >> if (!debugfs_create_ul("verbose", mode, dir, &attr->verbose)) >> goto fail; >> + if (!debugfs_create_u32("verbose_ratelimit_interval_ms", mode, dir, >> + &attr->ratelimit_state.interval)) >> + goto fail; >> + if (!debugfs_create_u32("verbose_ratelimit_burst", mode, dir, >> + &attr->ratelimit_state.burst)) >> + goto fail; >> if (!debugfs_create_bool("task-filter", mode, dir, &attr->task_filter)) >> goto fail; >> >> @@ -222,6 +234,7 @@ struct dentry *fault_create_debugfs_attr(const char *name, >> >> #endif /* CONFIG_FAULT_INJECTION_STACKTRACE_FILTER */ >> >> + attr->dname = dget(dir); >> return dir; >> fail: >> debugfs_remove_recursive(dir); >> -- >> 1.7.1 ^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH 1/2] ratelimit: add initialization macro 2014-08-20 12:54 [PATCH 1/2] ratelimit: add initialization macro Dmitry Monakhov 2014-08-20 12:54 ` [PATCH 2/2] fault-inject: add ratelimit option Dmitry Monakhov @ 2014-10-19 9:06 ` Dmitry Monakhov 1 sibling, 0 replies; 7+ messages in thread From: Dmitry Monakhov @ 2014-10-19 9:06 UTC (permalink / raw) To: linux-kernel; +Cc: akinobu.mita [-- Attachment #1: Type: text/plain, Size: 1268 bytes --] Dmitry Monakhov <dmonakhov@openvz.org> writes: Ping. > Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org> > --- > include/linux/ratelimit.h | 12 +++++++++--- > 1 files changed, 9 insertions(+), 3 deletions(-) > > diff --git a/include/linux/ratelimit.h b/include/linux/ratelimit.h > index 0a260d8..1810252 100644 > --- a/include/linux/ratelimit.h > +++ b/include/linux/ratelimit.h > @@ -17,14 +17,20 @@ struct ratelimit_state { > unsigned long begin; > }; > > -#define DEFINE_RATELIMIT_STATE(name, interval_init, burst_init) \ > - \ > - struct ratelimit_state name = { \ > +#define RATELIMIT_STATE_INIT(name, interval_init, burst_init) { \ > .lock = __RAW_SPIN_LOCK_UNLOCKED(name.lock), \ > .interval = interval_init, \ > .burst = burst_init, \ > } > > +#define RATELIMIT_STATE_INIT_DISABLED \ > + RATELIMIT_STATE_INIT(ratelimit_state, 0, DEFAULT_RATELIMIT_BURST) > + > +#define DEFINE_RATELIMIT_STATE(name, interval_init, burst_init) \ > + \ > + struct ratelimit_state name = \ > + RATELIMIT_STATE_INIT(name, interval_init, burst_init) \ > + > static inline void ratelimit_state_init(struct ratelimit_state *rs, > int interval, int burst) > { > -- > 1.7.1 [-- Attachment #2: Type: application/pgp-signature, Size: 818 bytes --] ^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2014-10-19 12:17 UTC | newest] Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2014-08-20 12:54 [PATCH 1/2] ratelimit: add initialization macro Dmitry Monakhov 2014-08-20 12:54 ` [PATCH 2/2] fault-inject: add ratelimit option Dmitry Monakhov 2014-08-20 14:20 ` Akinobu Mita 2014-08-20 14:36 ` Dmitry Monakhov 2014-10-19 9:07 ` Dmitry Monakhov 2014-10-19 12:17 ` Akinobu Mita 2014-10-19 9:06 ` [PATCH 1/2] ratelimit: add initialization macro Dmitry Monakhov
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