mbox series

[0/1] Put seq_buf on a diet

Message ID 20231019194514.2115506-1-willy@infradead.org (mailing list archive)
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Series Put seq_buf on a diet | expand

Message

Matthew Wilcox Oct. 19, 2023, 7:45 p.m. UTC
Prompted by the recent mails on ksummit, let's actually try to make this
work this time.  We need a container for manipulating strings easily,
and seq_buf is the closest thing we have to it.  The only problem I have
with it is the readpos that is only useful for the tracing code today.
So move it from the seq_buf to the tracing code.

We should go further with this patch series, including using seq_buf
within vsprintf, but if we can't get over this hurdle first, I'm not
going to waste my time on this again.

Matthew Wilcox (Oracle) (1):
  trace: Move readpos from seq_buf to trace_seq

 include/linux/seq_buf.h   |  5 +----
 include/linux/trace_seq.h |  2 ++
 kernel/trace/trace.c      | 10 +++++-----
 kernel/trace/trace_seq.c  |  6 +++++-
 lib/seq_buf.c             | 13 +++++--------
 5 files changed, 18 insertions(+), 18 deletions(-)

Comments

Steven Rostedt Oct. 19, 2023, 9:14 p.m. UTC | #1
On Thu, 19 Oct 2023 20:45:13 +0100
"Matthew Wilcox (Oracle)" <willy@infradead.org> wrote:

> Prompted by the recent mails on ksummit, let's actually try to make this
> work this time.  We need a container for manipulating strings easily,
> and seq_buf is the closest thing we have to it.  The only problem I have
> with it is the readpos that is only useful for the tracing code today.
> So move it from the seq_buf to the tracing code.
> 
> We should go further with this patch series, including using seq_buf
> within vsprintf, but if we can't get over this hurdle first, I'm not
> going to waste my time on this again.
> 
> Matthew Wilcox (Oracle) (1):
>   trace: Move readpos from seq_buf to trace_seq
> 
>  include/linux/seq_buf.h   |  5 +----
>  include/linux/trace_seq.h |  2 ++
>  kernel/trace/trace.c      | 10 +++++-----
>  kernel/trace/trace_seq.c  |  6 +++++-
>  lib/seq_buf.c             | 13 +++++--------
>  5 files changed, 18 insertions(+), 18 deletions(-)
> 

Thanks Matthew, I'll pull this in and add it to my for-next queue (after
testing)

-- Steve
Steven Rostedt Oct. 19, 2023, 9:18 p.m. UTC | #2
On Thu, 19 Oct 2023 17:14:39 -0400
Steven Rostedt <rostedt@goodmis.org> wrote:

> On Thu, 19 Oct 2023 20:45:13 +0100
> "Matthew Wilcox (Oracle)" <willy@infradead.org> wrote:
> 
> > Prompted by the recent mails on ksummit, let's actually try to make this
> > work this time.  We need a container for manipulating strings easily,
> > and seq_buf is the closest thing we have to it.  The only problem I have
> > with it is the readpos that is only useful for the tracing code today.
> > So move it from the seq_buf to the tracing code.
> > 
> > We should go further with this patch series, including using seq_buf
> > within vsprintf, but if we can't get over this hurdle first, I'm not
> > going to waste my time on this again.
> > 
> > Matthew Wilcox (Oracle) (1):
> >   trace: Move readpos from seq_buf to trace_seq
> > 
> >  include/linux/seq_buf.h   |  5 +----
> >  include/linux/trace_seq.h |  2 ++
> >  kernel/trace/trace.c      | 10 +++++-----
> >  kernel/trace/trace_seq.c  |  6 +++++-
> >  lib/seq_buf.c             | 13 +++++--------
> >  5 files changed, 18 insertions(+), 18 deletions(-)
> >   
> 
> Thanks Matthew, I'll pull this in and add it to my for-next queue (after
> testing)

Actually,

Can you resend it, and Cc: linux-trace-kernel@vger.kernel.org so that it
goes into patchwork.

Thanks!

-- Steve