From: Song Liu <song@kernel.org>
To: <bpf@vger.kernel.org>, <linux-mm@kvack.org>,
<linux-kernel@vger.kernel.org>
Cc: <ast@kernel.org>, <daniel@iogearbox.net>, <kernel-team@fb.com>,
<akpm@linux-foundation.org>, <rick.p.edgecombe@intel.com>,
<hch@infradead.org>, <imbrenda@linux.ibm.com>,
<mcgrof@kernel.org>, Song Liu <song@kernel.org>
Subject: [PATCH v4 bpf 0/4] vmalloc: bpf: introduce VM_ALLOW_HUGE_VMAP
Date: Fri, 15 Apr 2022 09:44:09 -0700 [thread overview]
Message-ID: <20220415164413.2727220-1-song@kernel.org> (raw)
Changes v3 => v4:
1. Fix __weak module_alloc_huge; remove unused vmalloc_huge; rename
__vmalloc_huge => vmalloc_huge. (Christoph Hellwig)
2. Use vzalloc (as it was before vmalloc_no_huge) and clean up comments in
kvm_s390_pv_alloc_vm.
Changes v2 => v3:
1. Use __vmalloc_huge in alloc_large_system_hash.
2. Use EXPORT_SYMBOL_GPL for new functions. (Christoph Hellwig)
3. Add more description about the issues and changes.(Christoph Hellwig,
Rick Edgecombe).
Changes v1 => v2:
1. Add vmalloc_huge(). (Christoph Hellwig)
2. Add module_alloc_huge(). (Christoph Hellwig)
3. Add Fixes tag and Link tag. (Thorsten Leemhuis)
Enabling HAVE_ARCH_HUGE_VMALLOC on x86_64 and use it for bpf_prog_pack has
caused some issues [1], as many users of vmalloc are not yet ready to
handle huge pages. To enable a more smooth transition to use huge page
backed vmalloc memory, this set replaces VM_NO_HUGE_VMAP flag with an new
opt-in flag, VM_ALLOW_HUGE_VMAP. More discussions about this topic can be
found at [2].
Patch 1 removes VM_NO_HUGE_VMAP and adds VM_ALLOW_HUGE_VMAP.
Patch 2 uses VM_ALLOW_HUGE_VMAP in bpf_prog_pack.
[1] https://lore.kernel.org/lkml/20220204185742.271030-1-song@kernel.org/
[2] https://lore.kernel.org/linux-mm/20220330225642.1163897-1-song@kernel.org/
Song Liu (4):
vmalloc: replace VM_NO_HUGE_VMAP with VM_ALLOW_HUGE_VMAP
page_alloc: use vmalloc_huge for large system hash
module: introduce module_alloc_huge
bpf: use module_alloc_huge for bpf_prog_pack
arch/Kconfig | 6 ++----
arch/powerpc/kernel/module.c | 2 +-
arch/s390/kvm/pv.c | 7 +------
arch/x86/kernel/module.c | 21 +++++++++++++++++++++
include/linux/moduleloader.h | 5 +++++
include/linux/vmalloc.h | 4 ++--
kernel/bpf/core.c | 7 ++++---
kernel/module.c | 8 ++++++++
mm/page_alloc.c | 2 +-
mm/vmalloc.c | 17 ++++++++++-------
10 files changed, 55 insertions(+), 24 deletions(-)
--
2.30.2
next reply other threads:[~2022-04-15 16:49 UTC|newest]
Thread overview: 61+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-15 16:44 Song Liu [this message]
2022-04-15 16:44 ` [PATCH v4 bpf 1/4] vmalloc: replace VM_NO_HUGE_VMAP with VM_ALLOW_HUGE_VMAP Song Liu
2022-04-15 17:43 ` Rik van Riel
2022-04-15 16:44 ` [PATCH v4 bpf 2/4] page_alloc: use vmalloc_huge for large system hash Song Liu
2022-04-15 17:43 ` Rik van Riel
2022-04-25 7:07 ` Geert Uytterhoeven
2022-04-25 8:17 ` Linus Torvalds
2022-04-25 8:24 ` Geert Uytterhoeven
2022-04-15 16:44 ` [PATCH v4 bpf 3/4] module: introduce module_alloc_huge Song Liu
2022-04-15 18:06 ` Rik van Riel
2022-06-16 16:10 ` Dave Hansen
2022-04-15 16:44 ` [PATCH v4 bpf 4/4] bpf: use module_alloc_huge for bpf_prog_pack Song Liu
2022-04-15 19:05 ` [PATCH v4 bpf 0/4] vmalloc: bpf: introduce VM_ALLOW_HUGE_VMAP Luis Chamberlain
2022-04-16 1:34 ` Song Liu
2022-04-16 1:42 ` Luis Chamberlain
2022-04-16 1:43 ` Luis Chamberlain
2022-04-16 5:08 ` Christoph Hellwig
2022-04-16 19:55 ` Song Liu
2022-04-16 20:30 ` Linus Torvalds
2022-04-16 22:26 ` Song Liu
2022-04-18 10:06 ` Mike Rapoport
2022-04-19 0:44 ` Luis Chamberlain
2022-04-19 1:56 ` Edgecombe, Rick P
2022-04-19 5:36 ` Song Liu
2022-04-19 18:42 ` Mike Rapoport
2022-04-19 19:20 ` Linus Torvalds
2022-04-20 2:03 ` Alexei Starovoitov
2022-04-20 2:18 ` Linus Torvalds
2022-04-20 14:42 ` Song Liu
2022-04-20 18:28 ` Luis Chamberlain
2022-04-21 7:29 ` Song Liu
2022-04-21 3:25 ` Nicholas Piggin
2022-04-21 5:48 ` Linus Torvalds
2022-04-21 6:02 ` Linus Torvalds
2022-04-21 9:07 ` Nicholas Piggin
2022-04-21 8:57 ` Nicholas Piggin
2022-04-21 15:44 ` Linus Torvalds
2022-04-21 23:30 ` Nicholas Piggin
2022-04-22 0:49 ` Linus Torvalds
2022-04-22 1:51 ` Nicholas Piggin
2022-04-22 2:31 ` Linus Torvalds
2022-04-22 2:57 ` Nicholas Piggin
2022-04-21 15:47 ` Edgecombe, Rick P
2022-04-21 16:15 ` Linus Torvalds
2022-04-22 0:12 ` Nicholas Piggin
2022-04-22 2:29 ` Edgecombe, Rick P
2022-04-22 2:47 ` Linus Torvalds
2022-04-22 16:54 ` Edgecombe, Rick P
2022-04-22 3:08 ` Nicholas Piggin
2022-04-22 4:31 ` Nicholas Piggin
2022-04-22 17:10 ` Edgecombe, Rick P
2022-04-22 20:22 ` Edgecombe, Rick P
2022-04-22 3:33 ` Nicholas Piggin
2022-04-21 9:47 ` Nicholas Piggin
2022-04-19 21:24 ` Luis Chamberlain
2022-04-19 23:58 ` Edgecombe, Rick P
2022-04-20 7:58 ` Petr Mladek
2022-04-19 18:20 ` Mike Rapoport
2022-04-24 17:43 ` Linus Torvalds
2022-04-25 6:48 ` Song Liu
2022-04-21 3:19 ` Nicholas Piggin
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