| Message ID | 20240828184644.30819-1-patricia.domingues@canonical.com |
|---|---|
| Headers | show |
| Series | powerpc/64s/radix/kfence: map __kfence_pool at page granularity (LP: 2060039) | expand |
On Wed, Aug 28, 2024 at 03:46:43PM -0300, patricia.domingues@canonical.com wrote: > BugLink: https://bugs.launchpad.net/bugs/2060039 > > SRU Justification: > > [Impact] > * L1 host hangs when triggering FADump with recommended crash > > [Fix] > * 353d7a84c214f184d5a6b62acdec8b4424159b7c 353d7a84c214 "powerpc/64s/radix/kfence: map __kfence_pool at page granularity" > > [Test Case] > * Have a Ubuntu Server 24.04 LTS installation on ppc64el. > * Enable FADump with 1GB: fadump=on crashkernel=1024M > * A kernel panic will happen when dump got triggered > > [Regression Potential] > * There is a certain risk of a regression, but it is mapping only the memory > allocated for KFENCE pool at page granularity, reducing memory consumption > when KFENCE is used. > > * On top the commit is already upstream reviewed and accepted. > > * The modifications were done and tested by IBM. > > * The fadump feature is supported only on IBM POWER systems. > > [Other] > * The fix/commit got upstream accepted with kernel v6.11-rc4, > hence Oracular (with a planned kernel of 6.11) is not affected. > > Hari Bathini (1): > powerpc/64s/radix/kfence: map __kfence_pool at page granularity > > arch/powerpc/include/asm/kfence.h | 11 +++- > arch/powerpc/mm/book3s64/radix_pgtable.c | 84 ++++++++++++++++++++++-- > arch/powerpc/mm/init-common.c | 3 + > 3 files changed, 93 insertions(+), 5 deletions(-) Acked-by: Kuan-Ying Lee <kuan-ying.lee@canonical.com>
On Wed, Aug 28, 2024 at 03:46:43PM -0300, patricia.domingues@canonical.com wrote: > BugLink: https://bugs.launchpad.net/bugs/2060039 > > SRU Justification: > > [Impact] > * L1 host hangs when triggering FADump with recommended crash > > [Fix] > * 353d7a84c214f184d5a6b62acdec8b4424159b7c 353d7a84c214 "powerpc/64s/radix/kfence: map __kfence_pool at page granularity" > > [Test Case] > * Have a Ubuntu Server 24.04 LTS installation on ppc64el. > * Enable FADump with 1GB: fadump=on crashkernel=1024M > * A kernel panic will happen when dump got triggered > > [Regression Potential] > * There is a certain risk of a regression, but it is mapping only the memory > allocated for KFENCE pool at page granularity, reducing memory consumption > when KFENCE is used. > > * On top the commit is already upstream reviewed and accepted. > > * The modifications were done and tested by IBM. > > * The fadump feature is supported only on IBM POWER systems. > > [Other] > * The fix/commit got upstream accepted with kernel v6.11-rc4, > hence Oracular (with a planned kernel of 6.11) is not affected. > > Hari Bathini (1): > powerpc/64s/radix/kfence: map __kfence_pool at page granularity > > arch/powerpc/include/asm/kfence.h | 11 +++- > arch/powerpc/mm/book3s64/radix_pgtable.c | 84 ++++++++++++++++++++++-- > arch/powerpc/mm/init-common.c | 3 + > 3 files changed, 93 insertions(+), 5 deletions(-) > > -- > 2.25.1 > > -- > kernel-team mailing list > kernel-team@lists.ubuntu.com > https://lists.ubuntu.com/mailman/listinfo/kernel-team Acked-by: Manuel Diewald <manuel.diewald@canonical.com>
On 28.08.24 20:46, patricia.domingues@canonical.com wrote: > BugLink: https://bugs.launchpad.net/bugs/2060039 > > SRU Justification: > > [Impact] > * L1 host hangs when triggering FADump with recommended crash > > [Fix] > * 353d7a84c214f184d5a6b62acdec8b4424159b7c 353d7a84c214 "powerpc/64s/radix/kfence: map __kfence_pool at page granularity" > > [Test Case] > * Have a Ubuntu Server 24.04 LTS installation on ppc64el. > * Enable FADump with 1GB: fadump=on crashkernel=1024M > * A kernel panic will happen when dump got triggered > > [Regression Potential] > * There is a certain risk of a regression, but it is mapping only the memory > allocated for KFENCE pool at page granularity, reducing memory consumption > when KFENCE is used. > > * On top the commit is already upstream reviewed and accepted. > > * The modifications were done and tested by IBM. > > * The fadump feature is supported only on IBM POWER systems. > > [Other] > * The fix/commit got upstream accepted with kernel v6.11-rc4, > hence Oracular (with a planned kernel of 6.11) is not affected. > > Hari Bathini (1): > powerpc/64s/radix/kfence: map __kfence_pool at page granularity > > arch/powerpc/include/asm/kfence.h | 11 +++- > arch/powerpc/mm/book3s64/radix_pgtable.c | 84 ++++++++++++++++++++++-- > arch/powerpc/mm/init-common.c | 3 + > 3 files changed, 93 insertions(+), 5 deletions(-) > Applied to noble:linux/master-next. Thanks. -Stefan