From: Dmitry Safonov <dima@arista.com> To: Joe Perches <joe@perches.com>, linux-kernel@vger.kernel.org Cc: Dmitry Safonov <0x7f454c46@gmail.com>, Andrew Morton <akpm@linux-foundation.org>, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, Ingo Molnar <mingo@kernel.org>, Jiri Slaby <jslaby@suse.com>, Petr Mladek <pmladek@suse.com>, Sergey Senozhatsky <sergey.senozhatsky@gmail.com>, Steven Rostedt <rostedt@goodmis.org>, Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>, Albert Ou <aou@eecs.berkeley.edu>, Ben Segall <bsegall@google.com>, Dietmar Eggemann <dietmar.eggemann@arm.com>, Greentime Hu <green.hu@gmail.com>, Ingo Molnar <mingo@redhat.com>, James Hogan <jhogan@kernel.org>, Juri Lelli <juri.lelli@redhat.com>, Mel Gorman <mgorman@suse.de>, Michal Simek <monstr@monstr.eu>, Palmer Dabbelt <palmer@dabbelt.com>, Paul Burton <paulburton@kernel.org>, Paul Walmsley <paul.walmsley@sifive.com>, Peter Zijlstra <peterz@infradead.org>, Ralf Baechle <ralf@linux-mips.org>, Thomas Gleixner <tglx@linutronix.de>, Vincent Chen <deanbo422@gmail.com>, Vincent Guittot <vincent.guittot@linaro.org>, Will Deacon <will@kernel.org>, linux-mips@vger.kernel.org, linux-riscv@lists.infradead.org Subject: Re: [PATCHv3 01/50] kallsyms/printk: Add loglvl to print_ip_sym() Date: Mon, 20 Apr 2020 18:25:32 +0100 [thread overview] Message-ID: <7616c5f4-def1-7362-ceef-db76107b9c2b@arista.com> (raw) In-Reply-To: <24a1f021e52ccabfd53baa22b93947ef10e6bf3b.camel@perches.com> Hi Joe, On 4/18/20 9:40 PM, Joe Perches wrote: > On Sat, 2020-04-18 at 21:18 +0100, Dmitry Safonov wrote: >> print_ip_sym() needs to have a log level parameter to comply with other >> parts being printed. Otherwise, half of the expected backtrace would be >> printed and other may be missing with some logging level. > > I'd rather create another extension to %ps that also emits > the [<address>] along with the symbol lookup and retire > print_ip_sym altogether. Makes sense. Would you mind if I'll do it on the top of these patches? [not to mix new printk-format with patches those add loglvl parameter] > > Something like: > --- > lib/vsprintf.c | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/lib/vsprintf.c b/lib/vsprintf.c > index 7c488a..8fce8f 100644 > --- a/lib/vsprintf.c > +++ b/lib/vsprintf.c > @@ -2072,6 +2072,8 @@ char *fwnode_string(char *buf, char *end, struct fwnode_handle *fwnode, > * - 'S' For symbolic direct pointers (or function descriptors) with offset > * - 's' For symbolic direct pointers (or function descriptors) without offset > * - '[Ss]R' as above with __builtin_extract_return_addr() translation > + * - '[Ss]B' [<address>] and symbolic direct pointers as above > + * (was used previously used as print_ip_sym) > * - '[Ff]' %pf and %pF were obsoleted and later removed in favor of > * %ps and %pS. Be careful when re-using these specifiers. > * - 'B' For backtraced symbolic direct pointers with offset > @@ -2183,6 +2185,8 @@ char *pointer(const char *fmt, char *buf, char *end, void *ptr, > case 'S': > case 's': > ptr = dereference_symbol_descriptor(ptr); > + if (fmt[1] == 'B') > + buf += vsprintf(buf, end, "[<%px>] ", ptr); > /* Fallthrough */ > case 'B': > return symbol_string(buf, end, ptr, spec, fmt); > > Thanks, Dmitry
WARNING: multiple messages have this Message-ID (diff)
From: Dmitry Safonov <dima@arista.com> To: Joe Perches <joe@perches.com>, linux-kernel@vger.kernel.org Cc: Juri Lelli <juri.lelli@redhat.com>, Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>, James Hogan <jhogan@kernel.org>, Dmitry Safonov <0x7f454c46@gmail.com>, Ben Segall <bsegall@google.com>, linux-riscv@lists.infradead.org, Vincent Chen <deanbo422@gmail.com>, Will Deacon <will@kernel.org>, Ingo Molnar <mingo@kernel.org>, Vincent Guittot <vincent.guittot@linaro.org>, Paul Burton <paulburton@kernel.org>, Peter Zijlstra <peterz@infradead.org>, Ingo Molnar <mingo@redhat.com>, Mel Gorman <mgorman@suse.de>, Jiri Slaby <jslaby@suse.com>, Petr Mladek <pmladek@suse.com>, Albert Ou <aou@eecs.berkeley.edu>, Steven Rostedt <rostedt@goodmis.org>, Greentime Hu <green.hu@gmail.com>, Paul Walmsley <paul.walmsley@sifive.com>, Thomas Gleixner <tglx@linutronix.de>, Dietmar Eggemann <dietmar.eggemann@arm.com>, Michal Simek <monstr@monstr.eu>, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, linux-mips@vger.kernel.org, Ralf Baechle <ralf@linux-mips.org>, Sergey Senozhatsky <sergey.senozhatsky@gmail.com>, Palmer Dabbelt <palmer@dabbelt.com>, Andrew Morton <akpm@linux-foundation.org> Subject: Re: [PATCHv3 01/50] kallsyms/printk: Add loglvl to print_ip_sym() Date: Mon, 20 Apr 2020 18:25:32 +0100 [thread overview] Message-ID: <7616c5f4-def1-7362-ceef-db76107b9c2b@arista.com> (raw) In-Reply-To: <24a1f021e52ccabfd53baa22b93947ef10e6bf3b.camel@perches.com> Hi Joe, On 4/18/20 9:40 PM, Joe Perches wrote: > On Sat, 2020-04-18 at 21:18 +0100, Dmitry Safonov wrote: >> print_ip_sym() needs to have a log level parameter to comply with other >> parts being printed. Otherwise, half of the expected backtrace would be >> printed and other may be missing with some logging level. > > I'd rather create another extension to %ps that also emits > the [<address>] along with the symbol lookup and retire > print_ip_sym altogether. Makes sense. Would you mind if I'll do it on the top of these patches? [not to mix new printk-format with patches those add loglvl parameter] > > Something like: > --- > lib/vsprintf.c | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/lib/vsprintf.c b/lib/vsprintf.c > index 7c488a..8fce8f 100644 > --- a/lib/vsprintf.c > +++ b/lib/vsprintf.c > @@ -2072,6 +2072,8 @@ char *fwnode_string(char *buf, char *end, struct fwnode_handle *fwnode, > * - 'S' For symbolic direct pointers (or function descriptors) with offset > * - 's' For symbolic direct pointers (or function descriptors) without offset > * - '[Ss]R' as above with __builtin_extract_return_addr() translation > + * - '[Ss]B' [<address>] and symbolic direct pointers as above > + * (was used previously used as print_ip_sym) > * - '[Ff]' %pf and %pF were obsoleted and later removed in favor of > * %ps and %pS. Be careful when re-using these specifiers. > * - 'B' For backtraced symbolic direct pointers with offset > @@ -2183,6 +2185,8 @@ char *pointer(const char *fmt, char *buf, char *end, void *ptr, > case 'S': > case 's': > ptr = dereference_symbol_descriptor(ptr); > + if (fmt[1] == 'B') > + buf += vsprintf(buf, end, "[<%px>] ", ptr); > /* Fallthrough */ > case 'B': > return symbol_string(buf, end, ptr, spec, fmt); > > Thanks, Dmitry
next prev parent reply other threads:[~2020-04-20 17:25 UTC|newest] Thread overview: 102+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-04-18 20:18 [PATCHv3 00/50] Add log level to show_stack() Dmitry Safonov 2020-04-18 20:18 ` Dmitry Safonov 2020-04-18 20:18 ` Dmitry Safonov 2020-04-18 20:18 ` [OpenRISC] " Dmitry Safonov 2020-04-18 20:18 ` Dmitry Safonov 2020-04-18 20:18 ` Dmitry Safonov 2020-04-18 20:18 ` [PATCHv3 01/50] kallsyms/printk: Add loglvl to print_ip_sym() Dmitry Safonov 2020-04-18 20:18 ` Dmitry Safonov 2020-04-18 20:40 ` Joe Perches 2020-04-18 20:40 ` Joe Perches 2020-04-20 17:25 ` Dmitry Safonov [this message] 2020-04-20 17:25 ` Dmitry Safonov 2020-04-20 17:28 ` Joe Perches 2020-04-20 17:28 ` Joe Perches 2020-04-18 20:18 ` [PATCHv3 02/50] alpha: Add show_stack_loglvl() Dmitry Safonov 2020-04-18 20:18 ` [PATCHv3 03/50] arc: " Dmitry Safonov 2020-04-18 20:18 ` Dmitry Safonov 2020-04-18 20:18 ` [PATCHv3 04/50] arm/asm: Add loglvl to c_backtrace() Dmitry Safonov 2020-04-18 20:18 ` Dmitry Safonov 2020-04-18 20:18 ` [PATCHv3 05/50] arm: Add loglvl to unwind_backtrace() Dmitry Safonov 2020-04-18 20:18 ` Dmitry Safonov 2020-04-18 20:19 ` [PATCHv3 06/50] arm: Add loglvl to dump_backtrace() Dmitry Safonov 2020-04-18 20:19 ` Dmitry Safonov 2020-04-18 20:19 ` [PATCHv3 07/50] arm: Wire up dump_backtrace_{entry,stm} Dmitry Safonov 2020-04-18 20:19 ` Dmitry Safonov 2020-04-18 20:19 ` [PATCHv3 08/50] arm: Add show_stack_loglvl() Dmitry Safonov 2020-04-18 20:19 ` Dmitry Safonov 2020-04-18 20:19 ` [PATCHv3 09/50] arm64: Add loglvl to dump_backtrace() Dmitry Safonov 2020-04-18 20:19 ` Dmitry Safonov 2020-04-18 20:19 ` [PATCHv3 10/50] arm64: Add show_stack_loglvl() Dmitry Safonov 2020-04-18 20:19 ` Dmitry Safonov 2020-04-18 20:19 ` [PATCHv3 11/50] c6x: " Dmitry Safonov 2020-04-25 18:18 ` Joe Perches 2020-04-26 1:06 ` Tetsuo Handa 2020-04-27 14:32 ` Dmitry Safonov 2020-04-18 20:19 ` [PATCHv3 12/50] csky: " Dmitry Safonov 2020-05-15 19:23 ` Andrew Morton 2020-05-18 13:34 ` Dmitry Safonov 2020-04-18 20:19 ` [PATCHv3 13/50] h8300: " Dmitry Safonov 2020-04-18 20:19 ` [PATCHv3 14/50] hexagon: " Dmitry Safonov 2020-04-18 20:19 ` [PATCHv3 15/50] ia64: Pass log level as arg into ia64_do_show_stack() Dmitry Safonov 2020-04-18 20:19 ` Dmitry Safonov 2020-04-18 20:19 ` [PATCHv3 16/50] ia64: Add show_stack_loglvl() Dmitry Safonov 2020-04-18 20:19 ` Dmitry Safonov 2020-04-18 20:19 ` [PATCHv3 17/50] m68k: " Dmitry Safonov 2020-04-18 20:19 ` [PATCHv3 18/50] microblaze: Add loglvl to microblaze_unwind_inner() Dmitry Safonov 2020-04-18 20:19 ` [PATCHv3 19/50] microblaze: Add loglvl to microblaze_unwind() Dmitry Safonov 2020-04-18 20:19 ` [PATCHv3 20/50] microblaze: Add show_stack_loglvl() Dmitry Safonov 2020-04-18 20:19 ` [PATCHv3 21/50] mips: " Dmitry Safonov 2020-04-18 20:19 ` [PATCHv3 22/50] nds32: " Dmitry Safonov 2020-04-18 20:19 ` [PATCHv3 23/50] nios2: " Dmitry Safonov 2020-04-18 20:19 ` [PATCHv3 24/50] openrisc: " Dmitry Safonov 2020-04-18 20:19 ` [OpenRISC] " Dmitry Safonov 2020-04-19 20:57 ` Stafford Horne 2020-04-19 20:57 ` [OpenRISC] " Stafford Horne 2020-04-20 17:06 ` Dmitry Safonov 2020-04-20 17:06 ` [OpenRISC] " Dmitry Safonov 2020-04-18 20:19 ` [PATCHv3 25/50] parisc: " Dmitry Safonov 2020-04-18 20:54 ` Helge Deller 2020-04-18 20:19 ` [PATCHv3 26/50] powerpc: " Dmitry Safonov 2020-04-18 20:19 ` Dmitry Safonov 2020-04-18 20:19 ` [PATCHv3 27/50] riscv: " Dmitry Safonov 2020-04-18 20:19 ` Dmitry Safonov 2020-04-18 20:19 ` [PATCHv3 28/50] s390: " Dmitry Safonov 2020-04-18 20:19 ` [PATCHv3 29/50] sh: Add loglvl to dump_mem() Dmitry Safonov 2020-04-18 20:19 ` Dmitry Safonov 2020-04-18 20:19 ` [PATCHv3 30/50] sh: Remove needless printk() Dmitry Safonov 2020-04-18 20:19 ` Dmitry Safonov 2020-04-18 20:19 ` [PATCHv3 31/50] sh: Add loglvl to printk_address() Dmitry Safonov 2020-04-18 20:19 ` Dmitry Safonov 2020-04-20 22:52 ` Andrew Morton 2020-04-20 22:52 ` Andrew Morton 2020-04-25 16:06 ` Rob Landley 2020-04-25 16:06 ` Rob Landley 2020-04-25 16:22 ` Rich Felker 2020-04-25 16:22 ` Rich Felker 2020-04-18 20:19 ` [PATCHv3 32/50] sh: Add loglvl to show_trace() Dmitry Safonov 2020-04-18 20:19 ` Dmitry Safonov 2020-04-18 20:19 ` [PATCHv3 33/50] sh: Add show_stack_loglvl() Dmitry Safonov 2020-04-18 20:19 ` Dmitry Safonov 2020-04-18 20:19 ` [PATCHv3 34/50] sparc: " Dmitry Safonov 2020-04-18 20:19 ` Dmitry Safonov 2020-04-18 20:19 ` [PATCHv3 35/50] um/sysrq: Remove needless variable sp Dmitry Safonov 2020-04-18 20:19 ` [PATCHv3 36/50] um: Add show_stack_loglvl() Dmitry Safonov 2020-04-18 20:19 ` [PATCHv3 37/50] unicore32: Remove unused pmode argument in c_backtrace() Dmitry Safonov 2020-04-18 20:19 ` [PATCHv3 38/50] unicore32: Add loglvl to c_backtrace() Dmitry Safonov 2020-04-18 20:19 ` [PATCHv3 39/50] unicore32: Add show_stack_loglvl() Dmitry Safonov 2020-04-18 20:19 ` [PATCHv3 40/50] x86: Add missing const qualifiers for log_lvl Dmitry Safonov 2020-04-18 20:19 ` [PATCHv3 41/50] x86: Add show_stack_loglvl() Dmitry Safonov 2020-04-18 20:19 ` [PATCHv3 42/50] xtensa: Add loglvl to show_trace() Dmitry Safonov 2020-05-11 19:45 ` Mike Rapoport 2020-05-11 21:12 ` Dmitry Safonov 2020-04-18 20:19 ` [PATCHv3 43/50] xtensa: Add show_stack_loglvl() Dmitry Safonov 2020-04-18 20:19 ` [PATCHv3 44/50] sysrq: Use show_stack_loglvl() Dmitry Safonov 2020-04-18 20:19 ` [PATCHv3 45/50] x86/amd_gart: Print stacktrace for a leak with KERN_ERR Dmitry Safonov 2020-04-18 20:19 ` [PATCHv3 46/50] power: Use show_stack_loglvl() Dmitry Safonov 2020-04-18 20:19 ` [PATCHv3 47/50] kdb: Don't play with console_loglevel Dmitry Safonov 2020-04-18 20:19 ` [PATCHv3 48/50] sched: Print stack trace with KERN_INFO Dmitry Safonov 2020-04-18 20:19 ` [PATCHv3 49/50] kernel: Use show_stack_loglvl() Dmitry Safonov 2020-04-18 20:19 ` [PATCHv3 50/50] kernel: Rename show_stack_loglvl() => show_stack() Dmitry Safonov 2020-04-23 15:48 ` [PATCHv3 00/50] Add log level to show_stack() Tetsuo Handa 2020-04-23 16:10 ` Dmitry Safonov
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