X-Git-Url: https://git.lizzy.rs/?a=blobdiff_plain;f=README.md;h=ae70c80d5f0a1e3b5d72757c6447043760b61c04;hb=34e22a80248d0d561855731b99620889ff4873dd;hp=f4a762937ecd7474787fa7fcc897bf0c1d1e3ea1;hpb=5e9bf46b46e8faeb456705a174c83cc0563fc6f9;p=rust.git

diff --git a/README.md b/README.md
index f4a762937ec..ae70c80d5f0 100644
--- a/README.md
+++ b/README.md
@@ -195,9 +195,15 @@ up the sysroot.  If you are using `miri` (the Miri driver) directly, see the
 Miri adds its own set of `-Z` flags, which are usually set via the `MIRIFLAGS`
 environment variable:
 
+* `-Zmiri-compare-exchange-weak-failure-rate=<rate>` changes the failure rate of
+  `compare_exchange_weak` operations. The default is `0.8` (so 4 out of 5 weak ops will fail).
+  You can change it to any value between `0.0` and `1.0`, where `1.0` means it
+  will always fail and `0.0` means it will never fail.
 * `-Zmiri-disable-alignment-check` disables checking pointer alignment, so you
   can focus on other failures, but it means Miri can miss bugs in your program.
   Using this flag is **unsound**.
+* `-Zmiri-disable-data-race-detector` disables checking for data races.  Using
+  this flag is **unsound**.
 * `-Zmiri-disable-stacked-borrows` disables checking the experimental
   [Stacked Borrows] aliasing rules.  This can make Miri run faster, but it also
   means no aliasing violations will be detected.  Using this flag is **unsound**