git: 839d3266d8c6 - main - uipc_shm.c: make large page allocation interruptible

The branch main has been updated by kib:

URL: https://cgit.FreeBSD.org/src/commit/?id=839d3266d8c6f6471cb92a3c0ae32eb16d117427

commit 839d3266d8c6f6471cb92a3c0ae32eb16d117427
Author:     Konstantin Belousov <kib@FreeBSD.org>
AuthorDate: 2026-04-28 02:34:49 +0000
Commit:     Konstantin Belousov <kib@FreeBSD.org>
CommitDate: 2026-05-01 01:06:42 +0000

    uipc_shm.c: make large page allocation interruptible
    
    in cases there is no page pressure or when the user lost patience
    waiting for very large allocation.  Other case is already handled by
    vm_wait_intr().
    
    Reported by:    "Lizzie from Eden Emulator project"
    Reviewed by:    adrian, markj
    Sponsored by:   The FreeBSD Foundation
    MFC after:      1 week
    Differential revision:  https://reviews.freebsd.org/D56725
---
 sys/kern/uipc_shm.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/sys/kern/uipc_shm.c b/sys/kern/uipc_shm.c
index 0ad5be2e8d71..197409d97f0c 100644
--- a/sys/kern/uipc_shm.c
+++ b/sys/kern/uipc_shm.c
@@ -829,12 +829,20 @@ shm_dotruncate_largepage(struct shmfd *shmfd, off_t length, void *rl_cookie)
 	 * object lock might allowed mapping of them.
 	 */
 	while (object->size < newobjsz) {
+		error = sig_intr();
+		if (error != 0)
+			return (error);
 		m = vm_page_alloc_contig(object, object->size, aflags,
 		    pagesizes[psind] / PAGE_SIZE, 0, ~0,
 		    pagesizes[psind], 0,
 		    VM_MEMATTR_DEFAULT);
 		if (m == NULL) {
 			VM_OBJECT_WUNLOCK(object);
+			error = sig_intr();
+			if (error != 0) {
+				VM_OBJECT_WLOCK(object);
+				return (error);
+			}
 			if (shmfd->shm_lp_alloc_policy ==
 			    SHM_LARGEPAGE_ALLOC_NOWAIT ||
 			    (shmfd->shm_lp_alloc_policy ==