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>

2025-10-21 15:56:21 +02:00

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acpi

Merge tag 'pm-6.18-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

2025-10-07 09:39:51 -07:00

asm-generic

Merge tag 'hyperv-next-signed-20251006' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux

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

Merge tag 'v6.18-p1' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6

2025-10-04 14:59:29 -07:00

cxl

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drm

drm/gpusvm, drm/xe: Fix userptr to not allow device private pages

2025-10-02 21:57:52 -07:00

dt-bindings

Merge tag 'clk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux

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

Merge tag 'linux_kselftest-kunit-6.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest

2025-10-01 19:15:11 -07:00

kvm

Merge tag 'kvmarm-6.18' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD

2025-09-30 13:23:28 -04:00

linux

Merge tag 'linux-can-next-for-6.19-20251017' of git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can-next

2025-10-20 18:36:17 -07:00

math-emu

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media

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memory

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misc

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net

net: avoid extra access to sk->sk_wmem_alloc in sock_wfree()

2025-10-21 15:56:21 +02:00

pcmcia

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ras

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rdma

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rv

Merge tag 'kernel-6.18-rc1.clone3' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs

2025-09-29 10:36:50 -07:00

scsi

Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi

2025-10-03 19:17:48 -07:00

soc

Merge tag 'clk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux

2025-10-07 09:28:37 -07:00

sound

Merge tag 'asoc-v6.18-2' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-next

2025-09-28 15:41:17 +02:00

target

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trace

Merge tag 'dma-mapping-6.18-2025-10-07' of git://git.kernel.org/pub/scm/linux/kernel/git/mszyprowski/linux

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

Merge tag 'timers-vdso-2025-09-29' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2025-09-30 16:58:21 -07:00

video

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xen

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Kbuild

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