Messages in this thread Patch in this message | | | Date | Mon, 2 Mar 2020 12:29:39 +0100 | Subject | [PATCH] threads: Update PID limit comment according to futex UAPI change | From | Jann Horn <> |
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The futex UAPI changed back in commit 76b81e2b0e22 ("[PATCH] lightweight robust futexes updates 2"), which landed in v2.6.17: FUTEX_TID_MASK is now 0x3fffffff instead of 0x1fffffff. Update the corresponding comment in include/linux/threads.h.
Signed-off-by: Jann Horn <jannh@google.com> --- include/linux/threads.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/linux/threads.h b/include/linux/threads.h index 3086dba525e20..18d5a74bcc3dd 100644 --- a/include/linux/threads.h +++ b/include/linux/threads.h @@ -29,7 +29,7 @@ /* * A maximum of 4 million PIDs should be enough for a while. - * [NOTE: PID/TIDs are limited to 2^29 ~= 500+ million, see futex.h.] + * [NOTE: PID/TIDs are limited to 2^30 ~= 1 billion, see FUTEX_TID_MASK.] */ #define PID_MAX_LIMIT (CONFIG_BASE_SMALL ? PAGE_SIZE * 8 : \ (sizeof(long) > 4 ? 4 * 1024 * 1024 : PID_MAX_DEFAULT)) -- 2.25.0.265.gbab2e86ba0-goog
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