for Problem 1
- Drop other patches because they aren't needed anymore
V1: https://lkml.org/lkml/2015/7/10/316
---
Hidehiro Kawai (2):
x86/panic: Replace smp_send_stop() with kdump friendly version in panic
path
mips/panic: Replace smp_send_stop() with kdump friendly version in panic
for Problem 1
- Drop other patches because they aren't needed anymore
V1: https://lkml.org/lkml/2015/7/10/316
---
Hidehiro Kawai (2):
x86/panic: Replace smp_send_stop() with kdump friendly version in panic
path
mips/panic: Replace smp_send_stop() with kdump friendly version in panic
, and it just call smp_send_stop(). Architecture
codes should override it so that kdump can work appropriately.
This patch provides MIPS version.
Reported-by: Daniel Walker <dwal...@fifo99.com>
Fixes: f06e5153f4ae (kernel/panic.c: add "crash_kexec_post_notifiers" option)
Signed-off-by
, and it just call smp_send_stop(). Architecture
codes should override it so that kdump can work appropriately.
This patch provides MIPS version.
Reported-by: Daniel Walker
Fixes: f06e5153f4ae (kernel/panic.c: add "crash_kexec_post_notifiers" option)
Signed-off-by: Hidehiro Kawai
Cc: Ralf B
Reported-by: Daniel Walker <dwal...@fifo99.com>
Fixes: f06e5153f4ae (kernel/panic.c: add "crash_kexec_post_notifiers" option)
Signed-off-by: Hidehiro Kawai <hidehiro.kawai...@hitachi.com>
Cc: Dave Young <dyo...@redhat.com>
Cc: Baoquan He <b...@redhat.com>
Cc: Vivek
Reported-by: Daniel Walker
Fixes: f06e5153f4ae (kernel/panic.c: add "crash_kexec_post_notifiers" option)
Signed-off-by: Hidehiro Kawai
Cc: Dave Young
Cc: Baoquan He
Cc: Vivek Goyal
Cc: Eric Biederman
Cc: Masami Hiramatsu
Cc: Daniel Walker
Cc: Xunlei Pang
Cc: Thomas Gleixner
Cc: Ingo
smp_send_stop() call with crash_kexec version which
saves cpu states and cleans up VMX/SVM
- Drop a fix for Problem 1 at this moment
Reported-by: Daniel Walker <dwal...@fifo99.com>
Fixes: f06e5153f4ae (kernel/panic.c: add "crash_kexec_post_notifiers" option)
Signed-off-by: Hidehiro Kawai
smp_send_stop() call with crash_kexec version which
saves cpu states and cleans up VMX/SVM
- Drop a fix for Problem 1 at this moment
Reported-by: Daniel Walker
Fixes: f06e5153f4ae (kernel/panic.c: add "crash_kexec_post_notifiers" option)
Signed-off-by: Hidehiro Kawai
Cc: Dave Young
Cc: Baoq
crash_kexec_post_notifiers ia a boot option which controls whether
the 1st kernel calls panic notifiers or not before booting the 2nd
kernel. However, there is no need to limit it to being modifiable
only at boot time. So, use core_param instead of early_param.
Signed-off-by: Hidehiro Kawai
crash_kexec_post_notifiers ia a boot option which controls whether
the 1st kernel calls panic notifiers or not before booting the 2nd
kernel. However, there is no need to limit it to being modifiable
only at boot time. So, use core_param instead of early_param.
Signed-off-by: Hidehiro Kawai
Cc
- Replace smp_send_stop() call with crash_kexec version which
saves cpu states and does cleanups instead of changing execution
flow
- Drop a fix for Problem 1
- Drop other patches because they aren't needed anymore
V1: https://lkml.org/lkml/2015/7/10/316
---
Hidehiro Kawai (2):
x86/panic
- Replace smp_send_stop() call with crash_kexec version which
saves cpu states and does cleanups instead of changing execution
flow
- Drop a fix for Problem 1
- Drop other patches because they aren't needed anymore
V1: https://lkml.org/lkml/2015/7/10/316
---
Hidehiro Kawai (2):
x86/panic
Change nmi_panic() macro to a normal function for the portability.
Also, export it for modules.
Changes since v2:
- Make nmi_panic receive a single string instead of printf style args
Signed-off-by: Hidehiro Kawai <hidehiro.kawai...@hitachi.com>
Cc: Andrew Morton <a...@linux-foundatio
Change nmi_panic() macro to a normal function for the portability.
Also, export it for modules.
Changes since v2:
- Make nmi_panic receive a single string instead of printf style args
Signed-off-by: Hidehiro Kawai
Cc: Andrew Morton
Cc: Borislav Petkov
Cc: Michal Nazarewicz
Cc: Michal Hocko
registers even if looping in NMI context").
ipmi_watchdog driver can call panic() from NMI handler, so replace
it with nmi_panic().
Signed-off-by: Hidehiro Kawai <hidehiro.kawai...@hitachi.com>
Acked-by: Corey Minyard <cminy...@mvista.com>
Acked-by: Guenter Roeck <li...@roeck-us.
registers even if looping in NMI context").
ipmi_watchdog driver can call panic() from NMI handler, so replace
it with nmi_panic().
Signed-off-by: Hidehiro Kawai
Acked-by: Corey Minyard
Acked-by: Guenter Roeck
Reviewed-by: Michal Hocko
Cc: openipmi-develo...@lists.sourceforge.net
--
registers even if looping in NMI context").
hpwdt driver can call panic() from NMI handler, so replace it with
nmi_panic(). Also, do some cleanups.
Changes since V1:
- Use direct return instead of goto
- Combine the panic message string into a single line
Signed-off-by: Hidehiro Kawai <hidehi
this patch set, some NMI or similar handlers (e.g.
MCE handler) remains to use panic(). This is because I can't test
them well and actual problems won't happen. For example, the
possibility that normal panic and panic on MCE happen simultaneously
is very low.
Hidehiro Kawai (3):
panic: Change
registers even if looping in NMI context").
hpwdt driver can call panic() from NMI handler, so replace it with
nmi_panic(). Also, do some cleanups.
Changes since V1:
- Use direct return instead of goto
- Combine the panic message string into a single line
Signed-off-by: Hidehiro Kawai
Cc: T
this patch set, some NMI or similar handlers (e.g.
MCE handler) remains to use panic(). This is because I can't test
them well and actual problems won't happen. For example, the
possibility that normal panic and panic on MCE happen simultaneously
is very low.
Hidehiro Kawai (3):
panic: Change
roblems won't happen. For example, the
possibility that normal panic and panic on MCE happen simultaneously
is very low.
Hidehiro Kawai (3):
panic: Change nmi_panic from macro to function
ipmi/watchdog: Use nmi_panic() when kernel panics in NMI handler
hpwdt: Use nmi_panic() when
roblems won't happen. For example, the
possibility that normal panic and panic on MCE happen simultaneously
is very low.
Hidehiro Kawai (3):
panic: Change nmi_panic from macro to function
ipmi/watchdog: Use nmi_panic() when kernel panics in NMI handler
hpwdt: Use nmi_panic() when
registers even if looping in NMI context").
hpwdt driver can call panic() from NMI handler, so replace it with
nmi_panic(). Also, do some cleanups.
Changes since V1:
- Use direct return instead of goto
- Combine the panic message string into a single line
Signed-off-by: Hidehiro Kawai <hidehi
registers even if looping in NMI context").
hpwdt driver can call panic() from NMI handler, so replace it with
nmi_panic(). Also, do some cleanups.
Changes since V1:
- Use direct return instead of goto
- Combine the panic message string into a single line
Signed-off-by: Hidehiro Kawai
Cc: T
registers even if looping in NMI context").
ipmi_watchdog driver can call panic() from NMI handler, so replace
it with nmi_panic().
Signed-off-by: Hidehiro Kawai <hidehiro.kawai...@hitachi.com>
Acked-by: Corey Minyard <cminy...@mvista.com>
Acked-by: Guenter Roeck <li...@roeck-us.
registers even if looping in NMI context").
ipmi_watchdog driver can call panic() from NMI handler, so replace
it with nmi_panic().
Signed-off-by: Hidehiro Kawai
Acked-by: Corey Minyard
Acked-by: Guenter Roeck
Reviewed-by: Michal Hocko
Cc: openipmi-develo...@lists.sourceforge.net
--
Change nmi_panic() macro to a normal function for the portability.
Also, export it for modules.
Signed-off-by: Hidehiro Kawai <hidehiro.kawai...@hitachi.com>
Cc: Andrew Morton <a...@linux-foundation.org>
Cc: Borislav Petkov <b...@suse.de>
Cc: Michal Nazarewicz <min...@mina86.
Change nmi_panic() macro to a normal function for the portability.
Also, export it for modules.
Signed-off-by: Hidehiro Kawai
Cc: Andrew Morton
Cc: Borislav Petkov
Cc: Michal Nazarewicz
Cc: Michal Hocko
Cc: Rasmus Villemoes
Cc: Nicolas Iooss
Cc: Javi Merino
Cc: Gobinda Charan Maji
Cc
se I can't test
them well and actual problems won't happen. For example, the
possibility that normal panic and panic on MCE happen simultaneously
is very low.
Hidehiro Kawai (3):
panic: Export panic_cpu and nmi_panic_self_stop
ipmi/watchdog: Use nmi_panic() when kernel panics in NMI
Export panic_cpu and nmi_panic_self_stop symbols for modules which
use nmi_panic() macro.
Signed-off-by: Hidehiro Kawai <hidehiro.kawai...@hitachi.com>
Cc: Andrew Morton <a...@linux-foundation.org>
Cc: Borislav Petkov <b...@suse.de>
Cc: Thomas Gleixner <t...@linutronix.de&g
se I can't test
them well and actual problems won't happen. For example, the
possibility that normal panic and panic on MCE happen simultaneously
is very low.
Hidehiro Kawai (3):
panic: Export panic_cpu and nmi_panic_self_stop
ipmi/watchdog: Use nmi_panic() when kernel panics in NMI
Export panic_cpu and nmi_panic_self_stop symbols for modules which
use nmi_panic() macro.
Signed-off-by: Hidehiro Kawai
Cc: Andrew Morton
Cc: Borislav Petkov
Cc: Thomas Gleixner
Cc: Michal Hocko
Cc: HATAYAMA Daisuke
Cc: Vitaly Kuznetsov
Cc: Tejun Heo
---
kernel/panic.c |2 ++
1 file
so replace it with
nmi_panic().
Signed-off-by: Hidehiro Kawai <hidehiro.kawai...@hitachi.com>
Cc: Thomas Mingarelli <thomas.mingare...@hpe.com>
Cc: Wim Van Sebroeck <w...@iguana.be>
Cc: Guenter Roeck <li...@roeck-us.net>
Cc: linux-watch...@vger.kernel.org
---
drivers/watchdog/h
so replace it with
nmi_panic().
Signed-off-by: Hidehiro Kawai
Cc: Thomas Mingarelli
Cc: Wim Van Sebroeck
Cc: Guenter Roeck
Cc: linux-watch...@vger.kernel.org
---
drivers/watchdog/hpwdt.c | 12 ++--
1 file changed, 10 insertions(+), 2 deletions(-)
diff --git a/drivers/watchdog/hpwdt.c b/driver
so replace
it with nmi_panic().
Signed-off-by: Hidehiro Kawai <hidehiro.kawai...@hitachi.com>
Cc: Corey Minyard <miny...@acm.org>
Cc: openipmi-develo...@lists.sourceforge.net
---
drivers/char/ipmi/ipmi_watchdog.c |2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --g
so replace
it with nmi_panic().
Signed-off-by: Hidehiro Kawai
Cc: Corey Minyard
Cc: openipmi-develo...@lists.sourceforge.net
---
drivers/char/ipmi/ipmi_watchdog.c |2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/char/ipmi/ipmi_watchdog.c
b/drivers/char/ipmi/ipmi_
Commit-ID: 7bbee5ca3896f69f09c68be549cb8997abe6bca6
Gitweb: http://git.kernel.org/tip/7bbee5ca3896f69f09c68be549cb8997abe6bca6
Author: Hidehiro Kawai
AuthorDate: Mon, 14 Dec 2015 11:19:11 +0100
Committer: Thomas Gleixner
CommitDate: Sat, 19 Dec 2015 11:07:01 +0100
kexec: Fix race
Commit-ID: 58c5661f2144c089bbc2e5d87c9ec1dc1d2964fe
Gitweb: http://git.kernel.org/tip/58c5661f2144c089bbc2e5d87c9ec1dc1d2964fe
Author: Hidehiro Kawai
AuthorDate: Mon, 14 Dec 2015 11:19:10 +0100
Committer: Thomas Gleixner
CommitDate: Sat, 19 Dec 2015 11:07:01 +0100
panic, x86: Allow
Commit-ID: b279d67df88a49c6ca32b3eebd195660254be394
Gitweb: http://git.kernel.org/tip/b279d67df88a49c6ca32b3eebd195660254be394
Author: Hidehiro Kawai
AuthorDate: Mon, 14 Dec 2015 11:19:13 +0100
Committer: Thomas Gleixner
CommitDate: Sat, 19 Dec 2015 11:07:01 +0100
x86/nmi: Save regs
Commit-ID: 9f318e3fcb1d4c48c26e8ca2ff2a459b82f36a23
Gitweb: http://git.kernel.org/tip/9f318e3fcb1d4c48c26e8ca2ff2a459b82f36a23
Author: Hidehiro Kawai
AuthorDate: Mon, 14 Dec 2015 11:19:14 +0100
Committer: Thomas Gleixner
CommitDate: Sat, 19 Dec 2015 11:07:01 +0100
Documentation
Commit-ID: b7c4948e9881fb38b048269f376fb4bf194ce24a
Gitweb: http://git.kernel.org/tip/b7c4948e9881fb38b048269f376fb4bf194ce24a
Author: Hidehiro Kawai
AuthorDate: Mon, 14 Dec 2015 11:19:12 +0100
Committer: Thomas Gleixner
CommitDate: Sat, 19 Dec 2015 11:07:01 +0100
x86/apic: Introduce
Commit-ID: 1717f2096b543cede7a380c858c765c41936bc35
Gitweb: http://git.kernel.org/tip/1717f2096b543cede7a380c858c765c41936bc35
Author: Hidehiro Kawai
AuthorDate: Mon, 14 Dec 2015 11:19:09 +0100
Committer: Thomas Gleixner
CommitDate: Sat, 19 Dec 2015 11:07:00 +0100
panic, x86: Fix re
Commit-ID: b7c4948e9881fb38b048269f376fb4bf194ce24a
Gitweb: http://git.kernel.org/tip/b7c4948e9881fb38b048269f376fb4bf194ce24a
Author: Hidehiro Kawai <hidehiro.kawai...@hitachi.com>
AuthorDate: Mon, 14 Dec 2015 11:19:12 +0100
Committer: Thomas Gleixner <t...@linutronix.de>
Commit-ID: 1717f2096b543cede7a380c858c765c41936bc35
Gitweb: http://git.kernel.org/tip/1717f2096b543cede7a380c858c765c41936bc35
Author: Hidehiro Kawai <hidehiro.kawai...@hitachi.com>
AuthorDate: Mon, 14 Dec 2015 11:19:09 +0100
Committer: Thomas Gleixner <t...@linutronix.de>
Commit-ID: b279d67df88a49c6ca32b3eebd195660254be394
Gitweb: http://git.kernel.org/tip/b279d67df88a49c6ca32b3eebd195660254be394
Author: Hidehiro Kawai <hidehiro.kawai...@hitachi.com>
AuthorDate: Mon, 14 Dec 2015 11:19:13 +0100
Committer: Thomas Gleixner <t...@linutronix.de>
Commit-ID: 9f318e3fcb1d4c48c26e8ca2ff2a459b82f36a23
Gitweb: http://git.kernel.org/tip/9f318e3fcb1d4c48c26e8ca2ff2a459b82f36a23
Author: Hidehiro Kawai <hidehiro.kawai...@hitachi.com>
AuthorDate: Mon, 14 Dec 2015 11:19:14 +0100
Committer: Thomas Gleixner <t...@linutronix.de>
Commit-ID: 58c5661f2144c089bbc2e5d87c9ec1dc1d2964fe
Gitweb: http://git.kernel.org/tip/58c5661f2144c089bbc2e5d87c9ec1dc1d2964fe
Author: Hidehiro Kawai <hidehiro.kawai...@hitachi.com>
AuthorDate: Mon, 14 Dec 2015 11:19:10 +0100
Committer: Thomas Gleixner <t...@linutronix.de>
Commit-ID: 7bbee5ca3896f69f09c68be549cb8997abe6bca6
Gitweb: http://git.kernel.org/tip/7bbee5ca3896f69f09c68be549cb8997abe6bca6
Author: Hidehiro Kawai <hidehiro.kawai...@hitachi.com>
AuthorDate: Mon, 14 Dec 2015 11:19:11 +0100
Committer: Thomas Gleixner <t...@linutronix.de>
egisters even if they are looping in NMI context'
- Fix comments
- Remove unneeded UP version of poll_crash_ipi_and_calback
- Rename poll_crash_ipi_and_callback to run_crash_ipi_callback
Signed-off-by: Hidehiro Kawai
Cc: Andrew Morton
Cc: Thomas Gleixner
Cc: Ingo Molnar
Cc: "H. Peter Anvin"
Cc: Pet
of current spin_trylock() to
exclude concurrent accesses to the panic routines
- Don't introduce no-lock version of panic()
Signed-off-by: Hidehiro Kawai
Cc: Andrew Morton
Cc: Thomas Gleixner
Cc: Ingo Molnar
Cc: "H. Peter Anvin"
Cc: Peter Zijlstra
Cc: Michal Hocko
---
arch/x86/ke
V3:
- Newly introduced
Signed-off-by: Hidehiro Kawai
Cc: Andrew Morton
Cc: Thomas Gleixner
Cc: Ingo Molnar
Cc: "H. Peter Anvin"
Cc: Peter Zijlstra
Cc: Eric Biederman
Cc: Vivek Goyal
Cc: Michal Hocko
---
arch/x86/kernel/nmi.c|6 +++---
arch/x86/kernel/re
kernel.panic_on_io_nmi sysctl was introduced by commit 5211a242d0cb
("x86: Add sysctl to allow panic on IOCK NMI error"), but its
documentation is missing. So, add it.
V6:
- Newly added
Signed-off-by: Hidehiro Kawai
Cc: Jonathan Corbet
Cc: Andrew Morton
---
Documentation/sysctl/
mments
- Change to use strncmp to parse the value of "apic_extnmi="
- Make apic_set_extnmi() return -EINVAL if the given value is invalid
V5:
- Rename the option from "noextnmi" to "apic_extnmi"
- Add apic_extnmi=all feature
- Fix the wrong documentation about "noextn
_and_callback to run_crash_ipi_callback
Signed-off-by: Hidehiro Kawai
Cc: Andrew Morton
Cc: Thomas Gleixner
Cc: Ingo Molnar
Cc: "H. Peter Anvin"
Cc: Peter Zijlstra
Cc: Michal Hocko
---
arch/x86/include/asm/reboot.h |1 +
arch/x86/kernel/nmi.c | 11 ++-
a
__crash_kexec(), no exclusion check version of crash_kexec(),
instead of checking if panic_cpu is the current CPU or not
V2:
- Use atomic_cmpxchg() instead of spin_trylock() on panic_lock
to exclude concurrent accesses
- Don't introduce no-lock version of crash_kexec()
Signed-off-by: Hidehiro Kawai
eady panicked
V2: https://lkml.org/lkml/2015/7/27/31
- Use atomic_cmpxchg() instead of current spin_trylock() to exclude
concurrent accesses to panic() and crash_kexec()
- Don't introduce no-lock version of panic() and crash_kexec()
V1: https://lkml.org/lkml/2015/7/22/81
---
Hidehiro Kawai
_and_callback to run_crash_ipi_callback
Signed-off-by: Hidehiro Kawai <hidehiro.kawai...@hitachi.com>
Cc: Andrew Morton <a...@linux-foundation.org>
Cc: Thomas Gleixner <t...@linutronix.de>
Cc: Ingo Molnar <mi...@redhat.com>
Cc: "H. Peter Anvin" <h...@zytor
__crash_kexec(), no exclusion check version of crash_kexec(),
instead of checking if panic_cpu is the current CPU or not
V2:
- Use atomic_cmpxchg() instead of spin_trylock() on panic_lock
to exclude concurrent accesses
- Don't introduce no-lock version of crash_kexec()
Signed-off-by: Hidehiro Kawai
eady panicked
V2: https://lkml.org/lkml/2015/7/27/31
- Use atomic_cmpxchg() instead of current spin_trylock() to exclude
concurrent accesses to panic() and crash_kexec()
- Don't introduce no-lock version of panic() and crash_kexec()
V1: https://lkml.org/lkml/2015/7/22/81
---
Hidehiro Kawai
mments
- Change to use strncmp to parse the value of "apic_extnmi="
- Make apic_set_extnmi() return -EINVAL if the given value is invalid
V5:
- Rename the option from "noextnmi" to "apic_extnmi"
- Add apic_extnmi=all feature
- Fix the wrong documentation about
kernel.panic_on_io_nmi sysctl was introduced by commit 5211a242d0cb
("x86: Add sysctl to allow panic on IOCK NMI error"), but its
documentation is missing. So, add it.
V6:
- Newly added
Signed-off-by: Hidehiro Kawai <hidehiro.kawai...@hitachi.com>
Cc: Jonathan Corbet <cor...@
V3:
- Newly introduced
Signed-off-by: Hidehiro Kawai <hidehiro.kawai...@hitachi.com>
Cc: Andrew Morton <a...@linux-foundation.org>
Cc: Thomas Gleixner <t...@linutronix.de>
Cc: Ingo Molnar <mi...@redhat.com>
Cc: "H. Peter Anvin" <h...@zytor.com>
Cc: Pet
of current spin_trylock() to
exclude concurrent accesses to the panic routines
- Don't introduce no-lock version of panic()
Signed-off-by: Hidehiro Kawai <hidehiro.kawai...@hitachi.com>
Cc: Andrew Morton <a...@linux-foundation.org>
Cc: Thomas Gleixner <t...@linutronix.de>
C
egisters even if they are looping in NMI context'
- Fix comments
- Remove unneeded UP version of poll_crash_ipi_and_calback
- Rename poll_crash_ipi_and_callback to run_crash_ipi_callback
Signed-off-by: Hidehiro Kawai <hidehiro.kawai...@hitachi.com>
Cc: Andrew Morton <a...@linux-foundation.org&g
no-lock version of panic()
Signed-off-by: Hidehiro Kawai
Cc: Andrew Morton
Cc: Thomas Gleixner
Cc: Ingo Molnar
Cc: "H. Peter Anvin"
Cc: Peter Zijlstra
Cc: Michal Hocko
---
arch/x86/kernel/nmi.c | 16
include/linux/kernel.h | 13 +
kernel/panic.c
is the current cpu or not
V2:
- Use atomic_cmpxchg() instead of spin_trylock() on panic_lock
to exclude concurrent accesses
- Don't introduce no-lock version of crash_kexec()
Signed-off-by: Hidehiro Kawai
Cc: Eric Biederman
Cc: Vivek Goyal
Cc: Andrew Morton
Cc: Michal Hocko
---
include/linux
ylock() to exclude
concurrent accesses to panic() and crash_kexec()
- Don't introduce no-lock version of panic() and crash_kexec()
V1: https://lkml.org/lkml/2015/7/22/81
---
Hidehiro Kawai (4):
panic/x86: Fix re-entrance problem due to panic on NMI
panic/x86: Allow cpus to save r
V5:
- Use WRITE_ONCE() when setting crash_ipi_done to 1 so that the
compiler doesn't change the instruction order
- Support the case of b in the above description
- Add poll_crash_ipi_and_callback()
V4:
- Rewrite the patch description
V3:
- Newly introduced
Signed-off-by: Hidehiro Kawai
Cc
name the option from "noextnmi" to "apic_extnmi"
- Add apic_extnmi=all feature
- Fix the wrong documentation about "noextnmi" (apic_extnmi=none)
Signed-off-by: Hidehiro Kawai
Cc: Thomas Gleixner
Cc: Ingo Molnar
Cc: "H. Peter Anvin"
Cc: Jonathan Corbet
---
Docu
ylock() to exclude
concurrent accesses to panic() and crash_kexec()
- Don't introduce no-lock version of panic() and crash_kexec()
V1: https://lkml.org/lkml/2015/7/22/81
---
Hidehiro Kawai (4):
panic/x86: Fix re-entrance problem due to panic on NMI
panic/x86: Allow cpus to save r
is the current cpu or not
V2:
- Use atomic_cmpxchg() instead of spin_trylock() on panic_lock
to exclude concurrent accesses
- Don't introduce no-lock version of crash_kexec()
Signed-off-by: Hidehiro Kawai <hidehiro.kawai...@hitachi.com>
Cc: Eric Biederman <ebied...@xmission.com>
Cc:
name the option from "noextnmi" to "apic_extnmi"
- Add apic_extnmi=all feature
- Fix the wrong documentation about "noextnmi" (apic_extnmi=none)
Signed-off-by: Hidehiro Kawai <hidehiro.kawai...@hitachi.com>
Cc: Thomas Gleixner <t...@linutronix.de>
Cc: Ingo Molnar <
V5:
- Use WRITE_ONCE() when setting crash_ipi_done to 1 so that the
compiler doesn't change the instruction order
- Support the case of b in the above description
- Add poll_crash_ipi_and_callback()
V4:
- Rewrite the patch description
V3:
- Newly introduced
Signed-off-by: Hidehiro Kawai
no-lock version of panic()
Signed-off-by: Hidehiro Kawai <hidehiro.kawai...@hitachi.com>
Cc: Andrew Morton <a...@linux-foundation.org>
Cc: Thomas Gleixner <t...@linutronix.de>
Cc: Ingo Molnar <mi...@redhat.com>
Cc: "H. Peter Anvin" <h...@zytor.com>
Cc: Peter Zi
no-lock version of panic()
Signed-off-by: Hidehiro Kawai
Cc: Andrew Morton
Cc: Thomas Gleixner
Cc: Ingo Molnar
Cc: "H. Peter Anvin"
Cc: Peter Zijlstra
Cc: Michal Hocko
---
arch/x86/kernel/nmi.c | 16
include/linux/kernel.h | 13 +
kernel/panic.c
:
- Rewrite the patch description
V3:
- Newly introduced
Signed-off-by: Hidehiro Kawai
Cc: Andrew Morton
Cc: Thomas Gleixner
Cc: Ingo Molnar
Cc: "H. Peter Anvin"
Cc: Peter Zijlstra
Cc: Eric Biederman
Cc: Vivek Goyal
Cc: Michal Hocko
---
arch/x86/kernel/nmi.c|6 +++---
(),
instead of checking if panic_cpu is the current cpu or not
V2:
- Use atomic_cmpxchg() instead of spin_trylock() on panic_lock
to exclude concurrent accesses
- Don't introduce no-lock version of crash_kexec()
Signed-off-by: Hidehiro Kawai
Cc: Eric Biederman
Cc: Vivek Goyal
Cc: Andrew Morton
Cc
This patch introduces new boot option "noextnmi" which disables
external NMI. This option is useful for the dump capture kernel
so that an HA application or administrator wouldn't mistakenly
shoot down the kernel by NMI.
Currently, only x86 supports this option.
Signed-off-by: Hide
ic_cmpxchg() instead of current spin_trylock() to exclude
concurrent accesses to panic() and crash_kexec()
- Don't introduce no-lock version of panic() and crash_kexec()
V1: https://lkml.org/lkml/2015/7/22/81
---
Hidehiro Kawai (4):
panic/x86: Fix re-entrance problem due to panic on NMI
no-lock version of panic()
Signed-off-by: Hidehiro Kawai <hidehiro.kawai...@hitachi.com>
Cc: Andrew Morton <a...@linux-foundation.org>
Cc: Thomas Gleixner <t...@linutronix.de>
Cc: Ingo Molnar <mi...@redhat.com>
Cc: "H. Peter Anvin" <h...@zytor.com>
Cc: Peter Zi
(),
instead of checking if panic_cpu is the current cpu or not
V2:
- Use atomic_cmpxchg() instead of spin_trylock() on panic_lock
to exclude concurrent accesses
- Don't introduce no-lock version of crash_kexec()
Signed-off-by: Hidehiro Kawai <hidehiro.kawai...@hitachi.com>
Cc: Eric Biederman
This patch introduces new boot option "noextnmi" which disables
external NMI. This option is useful for the dump capture kernel
so that an HA application or administrator wouldn't mistakenly
shoot down the kernel by NMI.
Currently, only x86 supports this option.
Signed-off-by: Hide
ic_cmpxchg() instead of current spin_trylock() to exclude
concurrent accesses to panic() and crash_kexec()
- Don't introduce no-lock version of panic() and crash_kexec()
V1: https://lkml.org/lkml/2015/7/22/81
---
Hidehiro Kawai (4):
panic/x86: Fix re-entrance problem due to panic on NMI
:
- Rewrite the patch description
V3:
- Newly introduced
Signed-off-by: Hidehiro Kawai <hidehiro.kawai...@hitachi.com>
Cc: Andrew Morton <a...@linux-foundation.org>
Cc: Thomas Gleixner <t...@linutronix.de>
Cc: Ingo Molnar <mi...@redhat.com>
Cc: "H. Peter Anvin" &
duplication
- In the case of panic on NMI, don't return from NMI handlers
if another cpu already panicked
V2:
- Use atomic_cmpxchg() instead of current spin_trylock() to
exclude concurrent accesses to the panic routines
- Don't introduce no-lock version of panic()
Signed-off-by: Hidehiro Kawai
to exclude
concurrent accesses to panic() and crash_kexec()
- Don't introduce no-lock version of panic() and crash_kexec()
---
Hidehiro Kawai (4):
panic/x86: Fix re-entrance problem due to panic on NMI
panic/x86: Allow cpus to save registers even if they are looping in NMI
context
concurrent accesses
- Don't introduce no-lock version of crash_kexec()
Signed-off-by: Hidehiro Kawai
Cc: Eric Biederman
Cc: Vivek Goyal
Cc: Andrew Morton
Cc: Michal Hocko
---
kernel/kexec.c | 20
1 file changed, 20 insertions(+)
diff --git a/kernel/kexec.c b/kernel
thie issue, we wait for the timing of the NMI IPI, then
call the NMI handler which saves register states.
V3:
- Newly introduced
Signed-off-by: Hidehiro Kawai
Cc: Andrew Morton
Cc: Thomas Gleixner
Cc: Ingo Molnar
Cc: "H. Peter Anvin"
Cc: Peter Zijlstra
Cc: Eric Biederman
Cc: V
This patch introduces new boot option "noextnmi" which disables
external NMI. This option is useful for the dump capture kernel
so that an HA application or administrator wouldn't mistakenly
shoot down the kernel by NMI.
Currently, only x86 supports this option.
Signed-off-by: Hide
thie issue, we wait for the timing of the NMI IPI, then
call the NMI handler which saves register states.
V3:
- Newly introduced
Signed-off-by: Hidehiro Kawai hidehiro.kawai...@hitachi.com
Cc: Andrew Morton a...@linux-foundation.org
Cc: Thomas Gleixner t...@linutronix.de
Cc: Ingo Molnar mi
This patch introduces new boot option noextnmi which disables
external NMI. This option is useful for the dump capture kernel
so that an HA application or administrator wouldn't mistakenly
shoot down the kernel by NMI.
Currently, only x86 supports this option.
Signed-off-by: Hidehiro Kawai
to exclude concurrent accesses
- Don't introduce no-lock version of crash_kexec()
Signed-off-by: Hidehiro Kawai hidehiro.kawai...@hitachi.com
Cc: Eric Biederman ebied...@xmission.com
Cc: Vivek Goyal vgo...@redhat.com
Cc: Andrew Morton a...@linux-foundation.org
Cc: Michal Hocko mho...@kernel.org
---
kernel
duplication
- In the case of panic on NMI, don't return from NMI handlers
if another cpu already panicked
V2:
- Use atomic_cmpxchg() instead of current spin_trylock() to
exclude concurrent accesses to the panic routines
- Don't introduce no-lock version of panic()
Signed-off-by: Hidehiro Kawai
concurrent accesses to panic() and crash_kexec()
- Don't introduce no-lock version of panic() and crash_kexec()
---
Hidehiro Kawai (4):
panic/x86: Fix re-entrance problem due to panic on NMI
panic/x86: Allow cpus to save registers even if they are looping in NMI
context
kexec: Fix
Hello Eric and Vivek,
Do you have any comments?
(2015/07/24 10:16), Hidehiro Kawai wrote:
> This is a bugfix patch for crash_kexec_post_notifiers boot option
> which allows users to call panic notifiers and kmsg dumpers before
> kdump.
>
> This fixes one of the problems rep
Hello Eric and Vivek,
Do you have any comments?
(2015/07/24 10:16), Hidehiro Kawai wrote:
This is a bugfix patch for crash_kexec_post_notifiers boot option
which allows users to call panic notifiers and kmsg dumpers before
kdump.
This fixes one of the problems reported by Daniel Walker
Hi,
(2015/07/27 23:55), Michal Hocko wrote:
> On Mon 27-07-15 10:58:50, Hidehiro Kawai wrote:
> [...]
>> @@ -1472,6 +1472,18 @@ void __weak crash_unmap_reserved_pages(void)
>>
>> void crash_kexec(struct pt_regs *regs)
>> {
>> +int old_cpu, this_cpu;
Hi,
Thanks for the review.
(2015/07/27 23:34), Michal Hocko wrote:
> On Mon 27-07-15 10:58:50, Hidehiro Kawai wrote:
> [...]
>> diff --git a/arch/x86/kernel/nmi.c b/arch/x86/kernel/nmi.c
>> index d05bd2e..5b32d81 100644
>> --- a/arch/x86/kernel/nmi.c
>> +++ b/arch
Factor out message flushing procedure which is used in run-to-completion
mode. This patch doesn't change the logic.
Signed-off-by: Hidehiro Kawai
---
drivers/char/ipmi/ipmi_si_intf.c | 39 ++
1 file changed, 18 insertions(+), 21 deletions(-)
diff --git
send_panic_events() calls intf->handlers->set_run_to_completion(),
but it has already been done in the caller function panic_event().
Remove it from send_panic_events().
Signed-off-by: Hidehiro Kawai
---
drivers/char/ipmi/ipmi_msghandler.c |2 --
1 file changed, 2 deletions(-)
diff
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