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https://github.com/libuv/libuv/commit/f1444293652cf5478a67b9305271d73ad6d36232
From f1444293652cf5478a67b9305271d73ad6d36232 Mon Sep 17 00:00:00 2001
From: matoro <12038583+matoro@users.noreply.github.com>
Date: Wed, 15 Nov 2023 17:57:06 -0500
Subject: [PATCH] linux: disable io_uring on hppa below kernel 6.1.51 (#4224)
First kernel with support is 6.1, was only fully functional from .51
onwards: https://lore.kernel.org/all/cb912694-b1fe-dbb0-4d8c-d608f3526905@gmx.de/
Co-authored-by: matoro <matoro@users.noreply.github.com>
--- a/src/unix/linux.c
+++ b/src/unix/linux.c
@@ -487,8 +487,16 @@ static int uv__use_io_uring(void) {
use = atomic_load_explicit(&use_io_uring, memory_order_relaxed);
if (use == 0) {
+ use = uv__kernel_version() >=
+#if defined(__hppa__)
+ /* io_uring first supported on parisc in 6.1, functional in .51 */
+ /* https://lore.kernel.org/all/cb912694-b1fe-dbb0-4d8c-d608f3526905@gmx.de/ */
+ /* 6.1.51 */ 0x060133
+#else
/* Older kernels have a bug where the sqpoll thread uses 100% CPU. */
- use = uv__kernel_version() >= /* 5.10.186 */ 0x050ABA ? 1 : -1;
+ /* 5.10.186 */ 0x050ABA
+#endif
+ ? 1 : -1;
/* But users can still enable it if they so desire. */
val = getenv("UV_USE_IO_URING");
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