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authorBen Wolsieffer <ben.wolsieffer@hefring.com>2023-11-02 11:48:25 -0400
committerWaldemar Brodkorb <wbx@openadk.org>2023-11-09 16:48:33 +0100
commitc303df56d32faa47ef163726357ed3ee5d075b88 (patch)
treed00ee1101dd14b5c1bfbd712765a26d56b777845 /extra/Configs
parent8166707a3350ce1fdaf669fb3836810727379342 (diff)
libpthread/nptl: make default stack size configurable
Threads currently have 2-4 MiB stacks by default (depending on the platform). This is fine on MMU platforms, where this stack space is not actually allocated until it is used, but tends to waste a large amount of memory on no-MMU platforms. This patch adds a PTHREADS_STACK_DEFAULT_SIZE Kconfig option that allows the user to override the default stack size at build time. This allows the user to select a reasonable default stack size for the software that runs on their system, and avoids the need to patch every package to add calls to pthread_attr_setstacksize(). An alternative to this patch would be to change the hardcoded default stack size on no-MMU platforms, but it is difficult to choose an appropriate value because the minimum required stack depends on the software in use. This would also be a breaking change. Signed-off-by: Ben Wolsieffer <ben.wolsieffer@hefring.com>
Diffstat (limited to 'extra/Configs')
-rw-r--r--extra/Configs/Config.in9
1 files changed, 9 insertions, 0 deletions
diff --git a/extra/Configs/Config.in b/extra/Configs/Config.in
index 49f561e5e..287db13d2 100644
--- a/extra/Configs/Config.in
+++ b/extra/Configs/Config.in
@@ -644,6 +644,15 @@ config PTHREADS_DEBUG_SUPPORT
If you are doing development and want to debug applications using
uClibc's pthread library, answer Y. Otherwise, answer N.
+config PTHREADS_STACK_DEFAULT_SIZE
+ int "Default thread stack size"
+ default 4194304 if TARGET_alpha # 4 MiB
+ default 4194304 if TARGET_powerpc # 4 MiB
+ default 2097152 # 2 MiB
+ help
+ Set the default thread stack size. This option is useful on MMU-less
+ systems where the stack size is fixed and the default stack size may
+ be excessively large and waste memory.
config UCLIBC_HAS_SYSLOG
bool "Syslog support"