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Re: [PATCH RFC v3 0/8] kernel-hacking: introduce CONFIG_NO_AUTO_INLINE
- To: Christoph Hellwig <hch@xxxxxx>, <chenlinxuan@xxxxxxxxxxxxx>
- From: Brendan Jackman <jackmanb@xxxxxxxxxx>
- Date: Thu, 01 May 2025 14:19:47 +0000
- Cc: Keith Busch <kbusch@xxxxxxxxxx>, Jens Axboe <axboe@xxxxxxxxx>, Sagi Grimberg <sagi@xxxxxxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Yishai Hadas <yishaih@xxxxxxxxxx>, Jason Gunthorpe <jgg@xxxxxxxx>, Shameer Kolothum <shameerali.kolothum.thodi@xxxxxxxxxx>, Kevin Tian <kevin.tian@xxxxxxxxx>, Alex Williamson <alex.williamson@xxxxxxxxxx>, Peter Huewe <peterhuewe@xxxxxx>, Jarkko Sakkinen <jarkko@xxxxxxxxxx>, Masahiro Yamada <masahiroy@xxxxxxxxxx>, Nathan Chancellor <nathan@xxxxxxxxxx>, Nicolas Schier <nicolas.schier@xxxxxxxxx>, Nick Desaulniers <nick.desaulniers+lkml@xxxxxxxxx>, Bill Wendling <morbo@xxxxxxxxxx>, Justin Stitt <justinstitt@xxxxxxxxxx>, Vlastimil Babka <vbabka@xxxxxxx>, Suren Baghdasaryan <surenb@xxxxxxxxxx>, Michal Hocko <mhocko@xxxxxxxx>, Johannes Weiner <hannes@xxxxxxxxxxx>, Zi Yan <ziy@xxxxxxxxxx>, Mathieu Desnoyers <mathieu.desnoyers@xxxxxxxxxxxx>, Peter Zijlstra <peterz@xxxxxxxxxxxxx>, "Paul E. McKenney" <paulmck@xxxxxxxxxx>, Boqun Feng <boqun.feng@xxxxxxxxx>, Dmitry Vyukov <dvyukov@xxxxxxxxxx>, Andrey Konovalov <andreyknvl@xxxxxxxxx>, Juergen Gross <jgross@xxxxxxxx>, Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>, Thomas Gleixner <tglx@xxxxxxxxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, Borislav Petkov <bp@xxxxxxxxx>, Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>, <x86@xxxxxxxxxx>, "H. Peter Anvin" <hpa@xxxxxxxxx>, <linux-nvme@xxxxxxxxxxxxxxxxxxx>, <linux-kernel@xxxxxxxxxxxxxxx>, <linux-mm@xxxxxxxxx>, <kvm@xxxxxxxxxxxxxxx>, <virtualization@xxxxxxxxxxxxxxx>, <linux-integrity@xxxxxxxxxxxxxxx>, <linux-kbuild@xxxxxxxxxxxxxxx>, <llvm@xxxxxxxxxxxxxxx>, Winston Wen <wentao@xxxxxxxxxxxxx>, <kasan-dev@xxxxxxxxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxxx>, Changbin Du <changbin.du@xxxxxxxxx>, Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
- Delivery-date: Thu, 01 May 2025 14:20:58 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On Tue Apr 29, 2025 at 12:35 PM UTC, Christoph Hellwig wrote:
> On Tue, Apr 29, 2025 at 12:06:04PM +0800, Chen Linxuan via B4 Relay wrote:
>> This series introduces a new kernel configuration option NO_AUTO_INLINE,
>> which can be used to disable the automatic inlining of functions.
>>
>> This will allow the function tracer to trace more functions
>> because it only traces functions that the compiler has not inlined.
>
> This still feels like a bad idea because it is extremely fragile.
Can you elaborate on that - does it introduce new fragility?
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