After kernel 5.19[1], the limit is decreased by 3. [1]https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/include/linux/swap.h?id=6c287605f Signed-off-by: Yang Xu <xuyang2018.jy@xxxxxxxxxxx> --- man2/swapon.2 | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/man2/swapon.2 b/man2/swapon.2 index c0e61cbc6..ee270cea1 100644 --- a/man2/swapon.2 +++ b/man2/swapon.2 @@ -164,7 +164,8 @@ Before Linux 2.4.10, .B MAX_SWAPFILES has the value 8; since Linux 2.4.10, it has the value 32. -Since Linux 2.6.18, the limit is decreased by 2 (thus: 30) +Since Linux 2.6.18, the limit is decreased by 2 (Since Linux 5.19.0, +the limit is decreased by 3) if the kernel is built with the .B CONFIG_MIGRATION option @@ -172,6 +173,7 @@ option .BR mbind (2) and .BR migrate_pages (2)). + Since Linux 2.6.32, the limit is further decreased by 1 if the kernel is built with the .B CONFIG_MEMORY_FAILURE -- 2.27.0
