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procd: remove support for mounting /tmp in zram

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The /tmp directory is mounted as tmpfs. The tmpfs filesystem is backed by
anonymous memory, which means it can be swapped out at any time, if there is
memory pressure [1]. For this reason, a zram swap device is a much better
choice than mounting /tmp on zram, since it's able to compress all anonymous
memory, and not just the memory assigned to /tmp. We already have the zram-swap
package for this specific purpose, which means procd's tmp-on-zram is both
redundant and more limited.

A follow-up patch will remove support for mounting /tmp in zram from procd
itself.

[1] https://www.kernel.org/doc/Documentation/filesystems/tmpfs.txt

Signed-off-by: Rui Salvaterra <rsalvaterra@gmail.com>
This commit is contained in:
Rui Salvaterra 2020-07-13 14:03:47 +01:00
parent 8235723c78
commit 247eaa4416
1 changed files with 1 additions and 10 deletions
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11
package/system/procd/Makefile
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@ -24,8 +24,7 @@ PKG_MAINTAINER:=John Crispin <john@phrozen.org>
PKG_ASLR_PIE_REGULAR:=1
PKG_CONFIG_DEPENDS:= \
CONFIG_TARGET_INIT_PATH CONFIG_KERNEL_SECCOMP \
CONFIG_PROCD_SHOW_BOOT CONFIG_PROCD_ZRAM_TMPFS \
CONFIG_TARGET_INIT_PATH CONFIG_KERNEL_SECCOMP CONFIG_PROCD_SHOW_BOOT \
CONFIG_KERNEL_NAMESPACES CONFIG_PACKAGE_procd-ujail CONFIG_PACKAGE_procd-seccomp
include $(INCLUDE_DIR)/package.mk
@ -96,10 +95,6 @@ config PROCD_SHOW_BOOT
default n
prompt "Print the shutdown to the console as well as logging it to syslog"
config PROCD_ZRAM_TMPFS
bool
default n
prompt "Mount /tmp using zram."
endmenu
endef
@ -111,10 +106,6 @@ ifeq ($(CONFIG_PROCD_SHOW_BOOT),y)
CMAKE_OPTIONS += -DSHOW_BOOT_ON_CONSOLE=1
endif
ifeq ($(CONFIG_PROCD_ZRAM_TMPFS),y)
CMAKE_OPTIONS += -DZRAM_TMPFS=1
endif
ifdef CONFIG_PACKAGE_procd-ujail
CMAKE_OPTIONS += -DJAIL_SUPPORT=1
endif