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[bpf-next,v2,0/2] bpf: Use GFP_KERNEL in bpf_event_entry_gen()

Message ID 20231211073843.1888058-1-houtao@huaweicloud.com (mailing list archive)
Headers show
Series bpf: Use GFP_KERNEL in bpf_event_entry_gen() | expand

Message

Hou Tao Dec. 11, 2023, 7:38 a.m. UTC 
From: Hou Tao <houtao1@huawei.com>

Hi,

The simple patch set aims to replace GFP_ATOMIC by GFP_KERNEL in
bpf_event_entry_gen(). These two patches in the patch set were
preparatory patches in "Fix the release of inner map" patchset [1] and
are not needed for v2, so re-post it to bpf-next tree.

Patch #1 reduces the scope of rcu_read_lock when updating fd map and
patch #2 replaces GFP_ATOMIC by GFP_KERNEL. Please see individual
patches for more details.

Comments are always welcome.

Change Log:
v2:
 * patch #1: add rcu_read_lock/unlock() for bpf_fd_array_map_update_elem
             as well to make it consistent with
	     bpf_fd_htab_map_update_elem and update commit message
             accordingly (Alexei)
 * patch #1/#2: collects ack tags from Yonghong

v1: https://lore.kernel.org/bpf/20231208103357.2637299-1-houtao@huaweicloud.com

[1]: https://lore.kernel.org/bpf/20231107140702.1891778-1-houtao@huaweicloud.com

Hou Tao (2):
  bpf: Reduce the scope of rcu_read_lock when updating fd map
  bpf: Use GFP_KERNEL in bpf_event_entry_gen()

 kernel/bpf/arraymap.c | 4 +++-
 kernel/bpf/hashtab.c  | 2 ++
 kernel/bpf/syscall.c  | 4 ----
 3 files changed, 5 insertions(+), 5 deletions(-)