Tiwei Bie 33c9da5dfb um: Rewrite the sigio workaround based on epoll and tgkill ...

The existing sigio workaround implementation removes FDs from the
poll when events are triggered, requiring users to re-add them via
add_sigio_fd() after processing. This introduces a potential race
condition between FD removal in write_sigio_thread() and next_poll
update in __add_sigio_fd(), and is inefficient due to frequent FD
removal and re-addition. Rewrite the implementation based on epoll
and tgkill for improved efficiency and reliability.

Signed-off-by: Tiwei Bie <tiwei.btw@antgroup.com>
Link: https://patch.msgid.link/20250315161910.4082396-2-tiwei.btw@antgroup.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

2025-03-20 09:28:44 +01:00

..

drivers

um: Make local functions and variables static

2024-04-22 21:43:03 +02:00

skas

um: mark rodata read-only and implement _nofault accesses

2025-03-18 11:03:14 +01:00

elf_aux.c

um: Add an internal header shared among the user code

2024-04-30 14:16:44 +02:00

execvp.c

um: Allow builds with Clang

2022-03-21 08:13:03 -07:00

file.c

um: remove file sync for stub data

2024-11-07 17:36:30 +01:00

helper.c

um: Prohibit the VM_CLONE flag in run_helper_thread()

2025-03-20 09:26:38 +01:00

internal.h

um: Add an internal header shared among the user code

2024-04-30 14:16:44 +02:00

irq.c

um: Remove the unneeded result variable

2023-02-01 22:11:24 +01:00

main.c

um: Remove unused THREAD_NAME_LEN macro

2025-01-10 13:49:57 +01:00

Makefile

um: restore process name

2024-10-23 09:25:55 +02:00

mem.c

um: set DONTDUMP and DONTFORK flags on KASAN shadow memory

2024-11-07 17:36:30 +01:00

process.c

um: remove copy_from_kernel_nofault_allowed

2025-03-18 11:03:29 +01:00

registers.c

um: switch to regset API and depend on XSTATE

2024-10-23 12:13:16 +02:00

sigio.c

um: Rewrite the sigio workaround based on epoll and tgkill

2025-03-20 09:28:44 +01:00

signal.c

um: mark rodata read-only and implement _nofault accesses

2025-03-18 11:03:14 +01:00

start_up.c

um: remove LDT support

2024-07-03 17:09:49 +02:00

time.c

um: Remove unused timeval_to_ns() function

2022-03-11 10:49:50 +01:00

tty.c

um: Add SPDX headers for files in arch/um/os-Linux

2019-09-15 21:37:17 +02:00

umid.c

um: Do not propagate uml_dir parameter to kernel

2024-10-23 09:52:48 +02:00

user_syms.c

Revert "[PATCH] uml: export symbols added by GCC hardened"

2023-06-15 04:47:04 +09:00

util.c

um: always include kconfig.h and compiler-version.h

2024-11-07 17:36:30 +01:00