Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
87 lines
1.9 KiB
C
87 lines
1.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
|
#ifndef _PROTO_MEMORY_H
|
|
#define _PROTO_MEMORY_H
|
|
|
|
#include <net/sock.h>
|
|
#include <net/hotdata.h>
|
|
|
|
/* 1 MB per cpu, in page units */
|
|
#define SK_MEMORY_PCPU_RESERVE (1 << (20 - PAGE_SHIFT))
|
|
|
|
static inline bool sk_has_memory_pressure(const struct sock *sk)
|
|
{
|
|
return sk->sk_prot->memory_pressure != NULL;
|
|
}
|
|
|
|
static inline bool
|
|
proto_memory_pressure(const struct proto *prot)
|
|
{
|
|
if (!prot->memory_pressure)
|
|
return false;
|
|
return !!READ_ONCE(*prot->memory_pressure);
|
|
}
|
|
|
|
static inline bool sk_under_global_memory_pressure(const struct sock *sk)
|
|
{
|
|
return proto_memory_pressure(sk->sk_prot);
|
|
}
|
|
|
|
static inline bool sk_under_memory_pressure(const struct sock *sk)
|
|
{
|
|
if (!sk->sk_prot->memory_pressure)
|
|
return false;
|
|
|
|
if (mem_cgroup_sk_enabled(sk) &&
|
|
mem_cgroup_sk_under_memory_pressure(sk))
|
|
return true;
|
|
|
|
if (sk->sk_bypass_prot_mem)
|
|
return false;
|
|
|
|
return !!READ_ONCE(*sk->sk_prot->memory_pressure);
|
|
}
|
|
|
|
static inline long
|
|
proto_memory_allocated(const struct proto *prot)
|
|
{
|
|
return max(0L, atomic_long_read(prot->memory_allocated));
|
|
}
|
|
|
|
static inline long
|
|
sk_memory_allocated(const struct sock *sk)
|
|
{
|
|
return proto_memory_allocated(sk->sk_prot);
|
|
}
|
|
|
|
static inline void proto_memory_pcpu_drain(struct proto *proto)
|
|
{
|
|
int val = this_cpu_xchg(*proto->per_cpu_fw_alloc, 0);
|
|
|
|
if (val)
|
|
atomic_long_add(val, proto->memory_allocated);
|
|
}
|
|
|
|
static inline void
|
|
sk_memory_allocated_add(const struct sock *sk, int val)
|
|
{
|
|
struct proto *proto = sk->sk_prot;
|
|
|
|
val = this_cpu_add_return(*proto->per_cpu_fw_alloc, val);
|
|
|
|
if (unlikely(val >= READ_ONCE(net_hotdata.sysctl_mem_pcpu_rsv)))
|
|
proto_memory_pcpu_drain(proto);
|
|
}
|
|
|
|
static inline void
|
|
sk_memory_allocated_sub(const struct sock *sk, int val)
|
|
{
|
|
struct proto *proto = sk->sk_prot;
|
|
|
|
val = this_cpu_sub_return(*proto->per_cpu_fw_alloc, val);
|
|
|
|
if (unlikely(val <= -READ_ONCE(net_hotdata.sysctl_mem_pcpu_rsv)))
|
|
proto_memory_pcpu_drain(proto);
|
|
}
|
|
|
|
#endif /* _PROTO_MEMORY_H */
|