| Message ID | 59b29ce04397578d5e38547e4e42d21448f58136.1527596768.git.juergh@canonical.com |
|---|---|
| State | New |
| Headers | show |
| Series | [SRU,Artful,PULL,v2] rfi-flush: Switch to new linear fallback flush | expand |
On 05/29/18 05:30, Juerg Haefliger wrote: > v2: Updated patchset from IBM. > > BugLink: https://bugs.launchpad.net/bugs/1744173 > > [Impact] > Change flush method from "congruence-first with dependencies" to "linear with no dependencies", which increases flush performance by 8x on P8, and > 3x on P9. Measured with null syscall loop, which will have the flush area in the L2 cache. > > The flush also becomes simpler and more adaptable to different cache > geometries. > > [Test Case] > TBD. > > [Regression Potential] > The risk is deemed low since the changes are confined to POWER only and the provided test kernels have been tested by IBM. > > Signed-off-by: Juerg Haefliger <juergh@canonical.com> > --- > The following changes since commit 32f2fe36d1166cbd4ec673e4eb65321b14a564f7: > > UBUNTU: SAUCE: Set generic SSBD feature for Intel cpus (2018-05-28 16:11:59 +0200) > > are available in the Git repository at: > > git://git.launchpad.net/~juergh/+git/artful-linux lp1744173-wave2 > > for you to fetch changes up to 59b29ce04397578d5e38547e4e42d21448f58136: > > powerpc/rfi-flush: Call setup_rfi_flush() after LPM migration (2018-05-29 14:01:55 +0200) > > ---------------------------------------------------------------- > Gustavo Walbon (1): > UBUNTU: SAUCE: rfi-flush: Factor out init_fallback_flush() > > Mauricio Faria de Oliveira (1): > powerpc/rfi-flush: Differentiate enabled and patched flush types > > Michael Ellerman (3): > UBUNTU: SAUCE: rfi-flush: Move rfi_flush_fallback_area to end of paca > powerpc/rfi-flush: Make it possible to call setup_rfi_flush() again > powerpc/rfi-flush: Call setup_rfi_flush() after LPM migration > > Nicholas Piggin (1): > powerpc/64s: Improve RFI L1-D cache flush fallback > > arch/powerpc/include/asm/paca.h | 6 +-- > arch/powerpc/include/asm/setup.h | 2 +- > arch/powerpc/kernel/asm-offsets.c | 3 +- > arch/powerpc/kernel/exceptions-64s.S | 76 +++++++++++++++---------------- > arch/powerpc/kernel/setup_64.c | 59 ++++++++++++------------ > arch/powerpc/platforms/pseries/mobility.c | 3 ++ > arch/powerpc/platforms/pseries/pseries.h | 2 + > arch/powerpc/platforms/pseries/setup.c | 2 +- > 8 files changed, 74 insertions(+), 79 deletions(-) > Changes look good, tested by the vendor. Acked-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
On 29.05.2018 05:30, Juerg Haefliger wrote: > v2: Updated patchset from IBM. > > BugLink: https://bugs.launchpad.net/bugs/1744173 > > [Impact] > Change flush method from "congruence-first with dependencies" to "linear with no dependencies", which increases flush performance by 8x on P8, and > 3x on P9. Measured with null syscall loop, which will have the flush area in the L2 cache. > > The flush also becomes simpler and more adaptable to different cache > geometries. > > [Test Case] > TBD. > > [Regression Potential] > The risk is deemed low since the changes are confined to POWER only and the provided test kernels have been tested by IBM. > > Signed-off-by: Juerg Haefliger <juergh@canonical.com> > --- > The following changes since commit 32f2fe36d1166cbd4ec673e4eb65321b14a564f7: > > UBUNTU: SAUCE: Set generic SSBD feature for Intel cpus (2018-05-28 16:11:59 +0200) > > are available in the Git repository at: > > git://git.launchpad.net/~juergh/+git/artful-linux lp1744173-wave2 > > for you to fetch changes up to 59b29ce04397578d5e38547e4e42d21448f58136: > > powerpc/rfi-flush: Call setup_rfi_flush() after LPM migration (2018-05-29 14:01:55 +0200) > > ---------------------------------------------------------------- > Gustavo Walbon (1): > UBUNTU: SAUCE: rfi-flush: Factor out init_fallback_flush() > > Mauricio Faria de Oliveira (1): > powerpc/rfi-flush: Differentiate enabled and patched flush types > > Michael Ellerman (3): > UBUNTU: SAUCE: rfi-flush: Move rfi_flush_fallback_area to end of paca > powerpc/rfi-flush: Make it possible to call setup_rfi_flush() again > powerpc/rfi-flush: Call setup_rfi_flush() after LPM migration > > Nicholas Piggin (1): > powerpc/64s: Improve RFI L1-D cache flush fallback > > arch/powerpc/include/asm/paca.h | 6 +-- > arch/powerpc/include/asm/setup.h | 2 +- > arch/powerpc/kernel/asm-offsets.c | 3 +- > arch/powerpc/kernel/exceptions-64s.S | 76 +++++++++++++++---------------- > arch/powerpc/kernel/setup_64.c | 59 ++++++++++++------------ > arch/powerpc/platforms/pseries/mobility.c | 3 ++ > arch/powerpc/platforms/pseries/pseries.h | 2 + > arch/powerpc/platforms/pseries/setup.c | 2 +- > 8 files changed, 74 insertions(+), 79 deletions(-) > Acked-by: Stefan Bader <stefan.bader@canonical.com>
applied to artful On 2018-05-29 14:30:18 , Juerg Haefliger wrote: > v2: Updated patchset from IBM. > > BugLink: https://bugs.launchpad.net/bugs/1744173 > > [Impact] > Change flush method from "congruence-first with dependencies" to "linear with no dependencies", which increases flush performance by 8x on P8, and > 3x on P9. Measured with null syscall loop, which will have the flush area in the L2 cache. > > The flush also becomes simpler and more adaptable to different cache > geometries. > > [Test Case] > TBD. > > [Regression Potential] > The risk is deemed low since the changes are confined to POWER only and the provided test kernels have been tested by IBM. > > Signed-off-by: Juerg Haefliger <juergh@canonical.com> > --- > The following changes since commit 32f2fe36d1166cbd4ec673e4eb65321b14a564f7: > > UBUNTU: SAUCE: Set generic SSBD feature for Intel cpus (2018-05-28 16:11:59 +0200) > > are available in the Git repository at: > > git://git.launchpad.net/~juergh/+git/artful-linux lp1744173-wave2 > > for you to fetch changes up to 59b29ce04397578d5e38547e4e42d21448f58136: > > powerpc/rfi-flush: Call setup_rfi_flush() after LPM migration (2018-05-29 14:01:55 +0200) > > ---------------------------------------------------------------- > Gustavo Walbon (1): > UBUNTU: SAUCE: rfi-flush: Factor out init_fallback_flush() > > Mauricio Faria de Oliveira (1): > powerpc/rfi-flush: Differentiate enabled and patched flush types > > Michael Ellerman (3): > UBUNTU: SAUCE: rfi-flush: Move rfi_flush_fallback_area to end of paca > powerpc/rfi-flush: Make it possible to call setup_rfi_flush() again > powerpc/rfi-flush: Call setup_rfi_flush() after LPM migration > > Nicholas Piggin (1): > powerpc/64s: Improve RFI L1-D cache flush fallback > > arch/powerpc/include/asm/paca.h | 6 +-- > arch/powerpc/include/asm/setup.h | 2 +- > arch/powerpc/kernel/asm-offsets.c | 3 +- > arch/powerpc/kernel/exceptions-64s.S | 76 +++++++++++++++---------------- > arch/powerpc/kernel/setup_64.c | 59 ++++++++++++------------ > arch/powerpc/platforms/pseries/mobility.c | 3 ++ > arch/powerpc/platforms/pseries/pseries.h | 2 + > arch/powerpc/platforms/pseries/setup.c | 2 +- > 8 files changed, 74 insertions(+), 79 deletions(-) > > -- > kernel-team mailing list > kernel-team@lists.ubuntu.com > https://lists.ubuntu.com/mailman/listinfo/kernel-team
v2: Updated patchset from IBM. BugLink: https://bugs.launchpad.net/bugs/1744173 [Impact] Change flush method from "congruence-first with dependencies" to "linear with no dependencies", which increases flush performance by 8x on P8, and 3x on P9. Measured with null syscall loop, which will have the flush area in the L2 cache. The flush also becomes simpler and more adaptable to different cache geometries. [Test Case] TBD. [Regression Potential] The risk is deemed low since the changes are confined to POWER only and the provided test kernels have been tested by IBM. Signed-off-by: Juerg Haefliger <juergh@canonical.com> --- The following changes since commit 32f2fe36d1166cbd4ec673e4eb65321b14a564f7: UBUNTU: SAUCE: Set generic SSBD feature for Intel cpus (2018-05-28 16:11:59 +0200) are available in the Git repository at: git://git.launchpad.net/~juergh/+git/artful-linux lp1744173-wave2 for you to fetch changes up to 59b29ce04397578d5e38547e4e42d21448f58136: powerpc/rfi-flush: Call setup_rfi_flush() after LPM migration (2018-05-29 14:01:55 +0200) ---------------------------------------------------------------- Gustavo Walbon (1): UBUNTU: SAUCE: rfi-flush: Factor out init_fallback_flush() Mauricio Faria de Oliveira (1): powerpc/rfi-flush: Differentiate enabled and patched flush types Michael Ellerman (3): UBUNTU: SAUCE: rfi-flush: Move rfi_flush_fallback_area to end of paca powerpc/rfi-flush: Make it possible to call setup_rfi_flush() again powerpc/rfi-flush: Call setup_rfi_flush() after LPM migration Nicholas Piggin (1): powerpc/64s: Improve RFI L1-D cache flush fallback arch/powerpc/include/asm/paca.h | 6 +-- arch/powerpc/include/asm/setup.h | 2 +- arch/powerpc/kernel/asm-offsets.c | 3 +- arch/powerpc/kernel/exceptions-64s.S | 76 +++++++++++++++---------------- arch/powerpc/kernel/setup_64.c | 59 ++++++++++++------------ arch/powerpc/platforms/pseries/mobility.c | 3 ++ arch/powerpc/platforms/pseries/pseries.h | 2 + arch/powerpc/platforms/pseries/setup.c | 2 +- 8 files changed, 74 insertions(+), 79 deletions(-)