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Diffstat (limited to 'Documentation/admin-guide/sysctl/kernel.rst')
| -rw-r--r-- | Documentation/admin-guide/sysctl/kernel.rst | 36 |
1 files changed, 17 insertions, 19 deletions
diff --git a/Documentation/admin-guide/sysctl/kernel.rst b/Documentation/admin-guide/sysctl/kernel.rst index 19224eeac1c2..3c8faad03d01 100644 --- a/Documentation/admin-guide/sysctl/kernel.rst +++ b/Documentation/admin-guide/sysctl/kernel.rst @@ -177,6 +177,7 @@ core_pattern %E executable path %c maximum size of core file by resource limit RLIMIT_CORE %C CPU the task ran on + %F pidfd number %<OTHER> both are dropped ======== ========================================== @@ -1014,30 +1015,26 @@ perf_user_access (arm64 and riscv only) Controls user space access for reading perf event counters. -arm64 -===== - -The default value is 0 (access disabled). +* for arm64 + The default value is 0 (access disabled). -When set to 1, user space can read performance monitor counter registers -directly. + When set to 1, user space can read performance monitor counter registers + directly. -See Documentation/arch/arm64/perf.rst for more information. - -riscv -===== + See Documentation/arch/arm64/perf.rst for more information. -When set to 0, user space access is disabled. +* for riscv + When set to 0, user space access is disabled. -The default value is 1, user space can read performance monitor counter -registers through perf, any direct access without perf intervention will trigger -an illegal instruction. + The default value is 1, user space can read performance monitor counter + registers through perf, any direct access without perf intervention will trigger + an illegal instruction. -When set to 2, which enables legacy mode (user space has direct access to cycle -and insret CSRs only). Note that this legacy value is deprecated and will be -removed once all user space applications are fixed. + When set to 2, which enables legacy mode (user space has direct access to cycle + and insret CSRs only). Note that this legacy value is deprecated and will be + removed once all user space applications are fixed. -Note that the time CSR is always directly accessible to all modes. + Note that the time CSR is always directly accessible to all modes. pid_max ======= @@ -1110,7 +1107,8 @@ printk_ratelimit_burst While long term we enforce one message per `printk_ratelimit`_ seconds, we do allow a burst of messages to pass through. ``printk_ratelimit_burst`` specifies the number of messages we can -send before ratelimiting kicks in. +send before ratelimiting kicks in. After `printk_ratelimit`_ seconds +have elapsed, another burst of messages may be sent. The default value is 10 messages. |