From: "agentzh at gmail dot com" <sourceware-bugzilla@sourceware.org>
To: systemtap@sourceware.org
Subject: [Bug runtime/31053] New: The stap runtime's allocator might sleep in atomic contexts
Date: Sat, 11 Nov 2023 07:19:41 +0000 [thread overview]
Message-ID: <bug-31053-6586@http.sourceware.org/bugzilla/> (raw)
https://sourceware.org/bugzilla/show_bug.cgi?id=31053
Bug ID: 31053
Summary: The stap runtime's allocator might sleep in atomic
contexts
Product: systemtap
Version: unspecified
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: runtime
Assignee: systemtap at sourceware dot org
Reporter: agentzh at gmail dot com
Target Milestone: ---
Currently, the `STP_ALLOC_FLAGS` flag used in the stap kernel runtime's
allocator actually includes __GFP_IO and __GFP_FS flags which might sleep. All
kernels since 3.10 would trigger this bug. But the STP_ALLOC_FLAGS is supposed
to be used "anywhere", including atomic contexts, according to the existing
code comment:
```
/* Default, and should be "safe" from anywhere. */
```
I'll fix it in a patch. Glad we drop support for the 2.6 kernels so we can
remove a lot of baggage here.
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next reply other threads:[~2023-11-11 7:19 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-11-11 7:19 agentzh at gmail dot com [this message]
2023-11-14 20:50 ` [Bug runtime/31053] " agentzh at gmail dot com
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