Attachment 246718 Details for Bug 275436 – another approach to patching tmpfs_subr.c

[patch] another approach to patching tmpfs_subr.c

tmpfs_subr.c.patch (text/plain), 1.19 KB, created by Mike Karels on 2023-12-01 23:10:40 UTC

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Creator: Mike Karels

Created: 2023-12-01 23:10:40 UTC

Size: 1.19 KB

patch

obsolete

>diff --git a/sys/fs/tmpfs/tmpfs_subr.c b/sys/fs/tmpfs/tmpfs_subr.c
>index 2fe7f7e3ca58..e83a7d833376 100644
>--- a/sys/fs/tmpfs/tmpfs_subr.c
>+++ b/sys/fs/tmpfs/tmpfs_subr.c
>@@ -290,6 +290,8 @@ tmpfs_can_alloc_page(vm_object_t obj, vm_pindex_t pindex)
> 	if (tm == NULL || vm_pager_has_page(obj, pindex, NULL, NULL) ||
> 	    tm->tm_pages_max == 0)
> 		return (true);
>+	if (tm->tm_pages_max == ULONG_MAX)
>+		return (tmpfs_mem_avail() >= 1);
> 	return (tm->tm_pages_max > atomic_load_long(&tm->tm_pages_used));
> }
> 
>@@ -413,7 +415,8 @@ tmpfs_mem_avail(void)
> 	size_t avail;
> 	long reserved;
> 
>-	avail = swap_pager_avail + vm_free_count();
>+	avail = swap_pager_avail / 2 + vm_free_avail();
>+	//avail = swap_pager_avail + vm_free_count();
> 	reserved = atomic_load_long(&tmpfs_pages_reserved);
> 	if (__predict_false(avail < reserved))
> 		return (0);
>@@ -1862,6 +1865,14 @@ tmpfs_reg_resize(struct vnode *vp, off_t newsize, boolean_t ignerr)
> 		if (newpages < oldpages)
> 			vm_object_page_remove(uobj, newpages, 0, 0);
> 	}
>+#if 0
>+	if (newpages > oldpages) {
>+		if (tmpfs_mem_avail() < newpages - oldpages) {
>+			VM_OBJECT_WUNLOCK(uobj);
>+			return (ENOSPC);
>+		}
>+	}
>+#endif
> 	uobj->size = newpages;
> 	VM_OBJECT_WUNLOCK(uobj);
>

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Attachments on bug 275436: 246673 | 246718 | 246880