From: John Ogness <john.ogness@linutronix.de>
To: Petr Mladek <pmladek@suse.com>,
Sergey Senozhatsky <sergey.senozhatsky@gmail.com>,
Steven Rostedt <rostedt@goodmis.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
Thomas Gleixner <tglx@linutronix.de>,
Prarit Bhargava <prarit@redhat.com>,
Mark Salyzyn <salyzyn@android.com>,
Chunyan Zhang <zhang.lyra@gmail.com>,
Orson Zhai <orsonzhai@gmail.com>,
Changki Kim <changki.kim@samsung.com>,
Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>,
linux-kernel@vger.kernel.org, Petr Mladek <pmladek@suse.com>
Subject: Re: [PATCH 1/2] printk: Store all three timestamps
Date: Thu, 24 Sep 2020 02:06:12 +0206 [thread overview]
Message-ID: <878sd0m4c3.fsf@jogness.linutronix.de> (raw)
In-Reply-To: <20200923135617.27149-2-pmladek@suse.com>
On 2020-09-23, Petr Mladek <pmladek@suse.com> wrote:
> diff --git a/kernel/printk/printk_ringbuffer.h b/kernel/printk/printk_ringbuffer.h
> index 0adaa685d1ca..09082c8472d3 100644
> --- a/kernel/printk/printk_ringbuffer.h
> +++ b/kernel/printk/printk_ringbuffer.h
> @@ -14,7 +15,7 @@
> */
> struct printk_info {
> u64 seq; /* sequence number */
> - u64 ts_nsec; /* timestamp in nanoseconds */
> + struct ktime_timestamps ts; /* timestamps */
Until now struct printk_info has contained generic types. If we add
struct ktime_timestamps, we may start storing more than we need. For
example, if more (possibly internal) fields are added to struct
ktime_timestamps that printk doesn't care about. We may prefer to
generically and explicitly store the information we care about:
u64 ts_mono;
u64 ts_boot;
u64 ts_real;
Or create our own struct printk_ts to copy the fields of interest to.
John Ogness
next prev parent reply other threads:[~2020-09-24 0:00 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-23 13:56 [RFC 0/2] printk: Add more metadata for each record Petr Mladek
2020-09-23 13:56 ` [PATCH 1/2] printk: Store all three timestamps Petr Mladek
2020-09-23 22:12 ` John Ogness
2020-09-24 1:45 ` Sergey Senozhatsky
2020-09-24 11:49 ` Petr Mladek
[not found] ` <CAJ-C09hqwOJhSXx1h40q96xhNZFXxP6dUVfjUQZpO4ZhOMZLbQ@mail.gmail.com>
2020-09-25 9:51 ` Petr Mladek
2020-09-24 0:00 ` John Ogness [this message]
2020-09-24 10:37 ` Petr Mladek
2020-09-23 13:56 ` [RFC 2/2] printk: Add more information about the printk caller Petr Mladek
2020-09-24 1:40 ` Sergey Senozhatsky
2020-09-24 11:58 ` Petr Mladek
2020-09-24 2:17 ` Sergey Senozhatsky
2020-09-24 8:23 ` John Ogness
2020-09-24 13:26 ` Petr Mladek
2020-09-24 13:06 ` Petr Mladek
2020-09-24 4:24 ` Ahmed S. Darwish
2020-09-24 12:53 ` Petr Mladek
2020-09-24 13:38 ` Petr Mladek
2020-09-25 0:54 ` Sergey Senozhatsky
2020-09-25 10:20 ` Petr Mladek
2020-10-21 11:48 ` 김창기
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