From: David Howells <dhowells@redhat.com>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: dhowells@redhat.com, Oleg Nesterov <oleg@redhat.com>,
Andrew Morton <akpm@linux-foundation.org>,
Ingo Molnar <mingo@elte.hu>,
Frederic Weisbecker <fweisbec@gmail.com>,
linux-kernel@vger.kernel.org,
"H. Peter Anvin" <hpa@linux.intel.com>,
linux-arch <linux-arch@vger.kernel.org>
Subject: Re: [PATCH 2/2] tracing: syscall_regfunc() should not skip kernel threads
Date: Tue, 19 Mar 2013 15:10:26 +0000 [thread overview]
Message-ID: <32387.1363705826@warthog.procyon.org.uk> (raw)
In-Reply-To: <1363548972.25967.137.camel@gandalf.local.home>
Steven Rostedt <rostedt@goodmis.org> wrote:
> Why? If we remove the tracepoint from the slowpath and use a table swap,
> then we wouldn't need to use the slowpath at all.
How are you engineering a table swap? Do you patch the system call code to
change the immediate address loaded or do you put in a level of indirection?
David
next prev parent reply other threads:[~2013-03-19 15:10 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-03-17 18:28 [PATCH RESEND 0/2] TIF_SYSCALL_TRACEPOINT fixes Oleg Nesterov
2013-03-17 18:28 ` [PATCH 1/2] tracing: syscall_*regfunc() can race with copy_process() Oleg Nesterov
2013-03-17 18:48 ` Steven Rostedt
2013-03-17 19:00 ` Oleg Nesterov
2013-03-17 19:34 ` Steven Rostedt
2013-03-18 16:33 ` Oleg Nesterov
2013-03-18 16:34 ` [PATCH v2 " Oleg Nesterov
2013-03-20 19:16 ` Steven Rostedt
2013-03-17 18:28 ` [PATCH 2/2] tracing: syscall_regfunc() should not skip kernel threads Oleg Nesterov
2013-03-17 18:54 ` Steven Rostedt
2013-03-17 19:04 ` Oleg Nesterov
2013-03-17 19:36 ` Steven Rostedt
2013-03-18 16:26 ` Oleg Nesterov
2013-03-19 15:10 ` David Howells [this message]
2013-03-19 15:36 ` Steven Rostedt
2013-03-19 21:27 ` H. Peter Anvin
-- strict thread matches above, loose matches on Subject: below --
2012-03-30 18:31 syscall_regfunc() && TIF_SYSCALL_TRACEPOINT Oleg Nesterov
2012-03-30 19:02 ` Steven Rostedt
2012-03-30 20:15 ` Oleg Nesterov
2012-03-31 0:13 ` Steven Rostedt
2012-03-31 20:45 ` Oleg Nesterov
2012-03-31 21:37 ` Steven Rostedt
2012-04-01 21:37 ` [PATCH 0/2] (Was: syscall_regfunc() && TIF_SYSCALL_TRACEPOINT) Oleg Nesterov
2012-04-01 21:38 ` [PATCH 2/2] tracing: syscall_regfunc() should not skip kernel threads Oleg Nesterov
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