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Eric Dumazet 3ff9bcecce net: avoid extra access to sk->sk_wmem_alloc in sock_wfree() 
UDP TX packets destructor is sock_wfree().

It suffers from a cache line bouncing in sock_def_write_space_wfree().

Instead of reading sk->sk_wmem_alloc after we just did an atomic RMW
on it, use __refcount_sub_and_test() to get the old value for free,
and pass the new value to sock_def_write_space_wfree().

Add __sock_writeable() helper.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Kuniyuki Iwashima <kuniyu@google.com>
Link: https://patch.msgid.link/20251017133712.2842665-1-edumazet@google.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
History 2025-10-21 15:56:21 +02:00
..
acpi More power management updates for 6.18-rc1 2025-10-07 09:39:51 -07:00
asm-generic hyperv-next for v6.18 2025-10-07 08:40:15 -07:00
clocksource clocksource/drivers/arm_arch_timer_mmio: Switch over to standalone driver 2025-09-23 12:31:50 +02:00
crypto This update includes the following changes: 2025-10-04 14:59:29 -07:00
cxl cxl/events: Trace Memory Sparing Event Record 2025-07-18 08:19:56 -07:00
drm drm/gpusvm, drm/xe: Fix userptr to not allow device private pages 2025-10-02 21:57:52 -07:00
dt-bindings There's a bunch of patches here across drivers/clk/ to migrate drivers to use 2025-10-07 09:28:37 -07:00
hyperv hyperv: Remove the spurious null directive line 2025-10-02 21:21:24 +00:00
keys KEYS: trusted_tpm1: Move private functionality out of public header 2025-09-27 21:05:06 +03:00
kunit linux_kselftest-kunit-6.18-rc1 2025-10-01 19:15:11 -07:00
kvm KVM/arm64 updates for 6.18 2025-09-30 13:23:28 -04:00
linux linux-can-next-for-6.19-20251017 2025-10-20 18:36:17 -07:00
math-emu powerpc/math-emu: Remove -w build flag and fix warnings 2022-09-05 17:28:25 +10:00
media media: v4l2-common: Add legacy camera sensor clock helper 2025-09-09 15:59:19 +02:00
memory memory: renesas-rpc-if: Add RZ/G3E xSPI support 2025-05-01 12:22:25 +02:00
misc cxl: Remove driver 2025-03-16 22:04:27 +11:00
net net: avoid extra access to sk->sk_wmem_alloc in sock_wfree() 2025-10-21 15:56:21 +02:00
pcmcia pcmcia: remove PCCARD_IODYN 2025-08-16 15:37:47 +02:00
ras tracing, AER: Hide PCIe AER event when PCIEAER is not configured 2025-07-21 16:40:56 -04:00
rdma RDMA/ucma: Support write an event into a CM 2025-08-13 06:16:11 -04:00
rv kernel-6.18-rc1.clone3 2025-09-29 10:36:50 -07:00
scsi SCSI misc on 20251002 2025-10-03 19:17:48 -07:00
soc There's a bunch of patches here across drivers/clk/ to migrate drivers to use 2025-10-07 09:28:37 -07:00
sound ASoC: Updates for v6.18 round 2 2025-09-28 15:41:17 +02:00
target scsi: target: core: Constify enabled() in struct target_opcode_descriptor 2025-05-20 22:11:03 -04:00
trace dma-mapping fixes for Linux 6.18: 2025-10-07 12:48:06 -07:00
uapi bpf: Introduce SK_BPF_BYPASS_PROT_MEM. 2025-10-16 12:04:47 -07:00
ufs scsi: ufs: core: Include UTP error in INT_FATAL_ERRORS 2025-09-30 16:10:29 -04:00
vdso Updates for the VDSO subsystem: 2025-09-30 16:58:21 -07:00
video drm/vesadrm: Support DRM_FORMAT_C8 2025-08-26 09:54:20 +02:00
xen xen: replace XENFEAT_auto_translated_physmap with xen_pv_domain() 2025-09-08 17:01:36 +02:00
Kbuild drm: ensure drm headers are self-contained and pass kernel-doc 2025-02-12 10:44:43 +02:00