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* [glibc/arm/morello/main] morello README update
@ 2022-11-18 11:35 Szabolcs Nagy
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From: Szabolcs Nagy @ 2022-11-18 11:35 UTC (permalink / raw)
  To: glibc-cvs;h=5b8ca6cbb1fa5a53cdb64a40541d4858295e34e3

commit 5b8ca6cbb1fa5a53cdb64a40541d4858295e34e3
Author: Szabolcs Nagy <>
Date:   Thu Nov 3 15:03:47 2022 +0000

    morello README update

 manual/README.morello | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/manual/README.morello b/manual/README.morello
index 8a2be21bd4..2db20724ba 100644
--- a/manual/README.morello
+++ b/manual/README.morello
@@ -29,7 +29,9 @@ Limitations of the morello port:
 - POSIX message queue async notify does not work (pointers passed via an fd).
 - Process shared robust mutexes don't work (pointers in shared memory).
 - Purecap pldd only supports purecap ABI processes (not lp64).
-- malloc has significant overhead (locks and hash table lookup).
+- malloc bounds narrowing has large overhead (locks and hash table lookup).
+- malloc bounds narrowing can break code expecting page granularity protection.
+	Use GLIBC_TUNABLES=glibc.mem.cap_narrowing=0 env var as a workaround.
 - string functions are not optimized.
-- Exectable stacks are not supported.
+- Executable stacks are not supported.
 - Internal pointer protection and pointer mangling are disabled.

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