Swatantra-66 commented on code in PR #20820:
URL: https://github.com/apache/nuttx/pull/20820#discussion_r4353239345
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fs/Kconfig:
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@@ -17,6 +17,25 @@ config DISABLE_MOUNTPOINT
bool "Disable support for mount points"
default n
+config FS_DIRENT_LITE
+ bool "Lightweight directory operations"
+ default n
+ depends on BUILD_FLAT
+ ---help---
+ Enable a lightweight directory implementation where opendir(),
+ readdir(), and closedir() bypass file descriptor allocation,
+ the synthetic directory inode, and vectored I/O. This
significantly
+ reduces code footprint (by ~2 KB) on memory-constrained systems.
Review Comment:
@xiaoxiang781216 Done. I have pivoted this PR to introduce
CONFIG_FS_VECTORED_IO (hidden option with no prompt string) as suggested:
Subsystems that implement vector I/O (drivers/serial) select FS_VECTORED_IO.
When disabled, fs_uio.c, file_readv(), file_writev(), readv(), and writev()
are omitted, and file_read() / file_write() invoke inode->u.i_ops->read/write
directly.
Preserves standard POSIX directory operations intact and resolves all merge
conflicts with the latest master.
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