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Bug 1948645 - [ARM 9 FEAT] Please enable MTE heap tagging support in glibc
Summary: [ARM 9 FEAT] Please enable MTE heap tagging support in glibc
Keywords:
Status: CLOSED CURRENTRELEASE
Alias: None
Product: Red Hat Enterprise Linux 9
Classification: Red Hat
Component: glibc
Version: 9.0
Hardware: aarch64
OS: Linux
medium
medium
Target Milestone: beta
: 9.0 Beta
Assignee: Florian Weimer
QA Contact: Sergey Kolosov
URL:
Whiteboard:
Depends On: 1958224
Blocks:
TreeView+ depends on / blocked
 
Reported: 2021-04-12 16:45 UTC by Jeremy Linton (ARM)
Modified: 2023-07-18 14:29 UTC (History)
7 users (show)

Fixed In Version: glibc-2.33.9000-36.el9
Doc Type: No Doc Update
Doc Text:
Clone Of:
Environment:
Last Closed: 2021-12-07 21:42:00 UTC
Type: Enhancement
Target Upstream Version:
Embargoed:


Attachments (Terms of Use)

Description Jeremy Linton (ARM) 2021-04-12 16:45:15 UTC
Description of problem: Arm V8.5 CPUs are expected in the RHEL 9 timeframe, as such Glibc on aarch64 should be built with --enable-memory-tagging. A similar defect for fedora is here: 1944758

There is another more general (kernel focused) RHEL 9 defect: 1894743


Version-Release number of selected component (if applicable): 2.33-2

Comment 2 Florian Weimer 2021-04-16 13:55:37 UTC
I assume this is just a simple spec file change, like this:

+ %ifarch aarch64
+ 		--enable-memory-tagging \
+ %endif

Can we do this for glibc 2.33, or should we wait until the rebase to glibc 2.34? Thanks.

Comment 4 Carlos O'Donell 2021-05-10 16:26:37 UTC
(In reply to Florian Weimer from comment #2)
> I assume this is just a simple spec file change, like this:
> 
> + %ifarch aarch64
> + 		--enable-memory-tagging \
> + %endif
> 
> Can we do this for glibc 2.33, or should we wait until the rebase to glibc
> 2.34? Thanks.

We received feedback from Arm about this.

The answer to this is as follows:
- The 2.33 release has everything that we need to enable memory tagging and small fixes were backported into the release branch.
- That 2.34 has only performance improvements.

Therefore we can move this forward with glibc 2.33.


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