From: Pingfan Liu <piliu@redhat.com>
To: linuxppc-dev@lists.ozlabs.org
Cc: Pingfan Liu <piliu@redhat.com>,
Michael Ellerman <mpe@ellerman.id.au>,
Nicholas Piggin <npiggin@gmail.com>,
Christophe Leroy <christophe.leroy@csgroup.eu>,
Mahesh Salgaonkar <mahesh@us.ibm.com>,
Wen Xiong <wenxiong@us.ibm.com>, Baoquan He <bhe@redhat.com>,
Ming Lei <ming.lei@redhat.com>,
kexec@lists.infradead.org
Subject: [PATCHv8 0/5] enable nr_cpus for powerpc
Date: Mon, 9 Oct 2023 19:30:31 +0800 [thread overview]
Message-ID: <20231009113036.45988-1-piliu@redhat.com> (raw)
Since my last v4 [1], the code has undergone great changes. The paca[]
array has been reorganized and indexed by paca_ptrs[], which
dramatically decreases the memory consumption even if there are many
unpresent cpus in the middle.
However, reordering the logical cpu numbers can further decrease the
size of paca_ptrs[] in the kdump case. So I keep [1-2/5], which
rotate-shifts the cpu's sequence number in the device tree to obtain the
logical cpu id.
Patch [3-5/5] make further efforts to decrease the nr_cpus to be less
than or equal to two.
[1]: https://lore.kernel.org/linuxppc-dev/1520829790-14029-1-git-send-email-kernelfans@gmail.com/
---
v7 -> v8
Fix bug when turning on DEBUG macro
Introducing [PATCHv7 4/5] powerpc/cpu: Skip impossible cpu during iteration on
a core, which avoid access to unpopulated pcpu data.
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Christophe Leroy <christophe.leroy@csgroup.eu>
Cc: Mahesh Salgaonkar <mahesh@us.ibm.com>
Cc: Wen Xiong <wenxiong@us.ibm.com>
Cc: Baoquan He <bhe@redhat.com>
Cc: Ming Lei <ming.lei@redhat.com>
Cc: kexec@lists.infradead.org
To: linuxppc-dev@lists.ozlabs.org
Pingfan Liu (5):
powerpc/setup : Enable boot_cpu_hwid for PPC32
powerpc/setup: Loosen the mapping between cpu logical id and its seq
in dt
powerpc/setup: Handle the case when boot_cpuid greater than nr_cpus
powerpc/cpu: Skip impossible cpu during iteration on a core
powerpc/setup: alloc extra paca_ptrs to hold boot_cpuid
arch/powerpc/include/asm/cputhreads.h | 6 ++
arch/powerpc/include/asm/smp.h | 2 +-
arch/powerpc/kernel/paca.c | 10 ++-
arch/powerpc/kernel/prom.c | 29 +++---
arch/powerpc/kernel/setup-common.c | 108 ++++++++++++++++++-----
arch/powerpc/kernel/smp.c | 2 +-
arch/powerpc/kvm/book3s_hv.c | 7 +-
arch/powerpc/platforms/powernv/idle.c | 32 +++----
arch/powerpc/platforms/powernv/subcore.c | 5 +-
9 files changed, 143 insertions(+), 58 deletions(-)
--
2.31.1
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next reply other threads:[~2023-10-09 11:31 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-10-09 11:30 Pingfan Liu [this message]
2023-10-09 11:30 ` [PATCHv8 1/5] powerpc/setup : Enable boot_cpu_hwid for PPC32 Pingfan Liu
2023-10-10 4:44 ` Sourabh Jain
2023-10-10 8:24 ` Sourabh Jain
2023-10-10 9:08 ` Sourabh Jain
2023-10-11 2:30 ` Pingfan Liu
2023-10-11 10:53 ` Sourabh Jain
2023-10-12 13:20 ` Pingfan Liu
2023-10-16 6:43 ` Sourabh Jain
2023-10-17 2:12 ` Pingfan Liu
2023-10-09 11:30 ` [PATCHv8 2/5] powerpc/setup: Loosen the mapping between cpu logical id and its seq in dt Pingfan Liu
2023-10-10 10:37 ` Hari Bathini
2023-10-11 3:11 ` Pingfan Liu
2023-10-09 11:30 ` [PATCHv8 3/5] powerpc/setup: Handle the case when boot_cpuid greater than nr_cpus Pingfan Liu
2023-10-10 8:26 ` Hari Bathini
2023-10-11 3:05 ` Pingfan Liu
2023-10-12 5:32 ` Hari Bathini
2023-10-09 11:30 ` [PATCHv8 4/5] powerpc/cpu: Skip impossible cpu during iteration on a core Pingfan Liu
2023-10-09 11:30 ` [PATCHv8 5/5] powerpc/setup: alloc extra paca_ptrs to hold boot_cpuid Pingfan Liu
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