wpa_supplicant (2.9) memory usage

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Hi,

I have 2 devices set in IBSS mode. After few minutes, I can see that
wpa_supplciant is using 25+ MBytes of RAM. The devices that I am
working with have only 64M, so I'd like to lower the memory used by
wpa_supp.

Is 25 MB considered normal or should I start to do some memory
debugging? Knowing that it does not seem like a leak as the memory
consumption does not go beyond that no matter how much time I leave
the units up.

I am using hostapd 2.9 from openwrt.

This is my wpa config file:

CONFIG_DRIVER_NL80211=y
CONFIG_DRIVER_NL80211_QCA=y
CONFIG_LIBNL32=y
CONFIG_VHT_OVERRIDES=y
CONFIG_CTRL_IFACE=y
CONFIG_BACKEND=file
CONFIG_NO_CONFIG_BLOBS=y
CONFIG_TLS=internal
CONFIG_INTERNAL_LIBTOMMATH=y
CONFIG_INTERNAL_LIBTOMMATH_FAST=y
CONFIG_IEEE80211N=y
CONFIG_IEEE80211AC=y
CONFIG_IBSS_RSN=y

and the IBSS SSID config:

ap_scan=1
network={
  ssid="TEST1"
  key_mgmt=WPA-PSK
  proto=RSN
  psk="secret"
  mode=1
  frequency=2412
  fixed_freq=1
  pairwise=CCMP
  group=CCMP
}

Thank you.

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