From: Qian Cai <cai@lca.pw>
To: Andrey Konovalov <andreyknvl@google.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will.deacon@arm.com>,
kasan-dev <kasan-dev@googlegroups.com>,
Linux ARM <linux-arm-kernel@lists.infradead.org>,
Andrey Ryabinin <aryabinin@virtuozzo.com>,
Dmitry Vyukov <dvyukov@google.com>
Subject: Re: soft lockups with SLAB_CONSISTENCY_CHECKS + KASAN_SW_TAGS (was: livelock with KASAN_SW_TAGS)
Date: Tue, 19 Feb 2019 14:08:00 -0500 [thread overview]
Message-ID: <1550603280.6911.43.camel@lca.pw> (raw)
In-Reply-To: <CAAeHK+yUQ0kZUspiFazjkFu7CRdaL_DZijUXD1po45gnGZkV3w@mail.gmail.com>
On Tue, 2019-02-19 at 19:56 +0100, Andrey Konovalov wrote:
> Ah, so it doesn't lock, it's just very slow? memchr_inv() is the only
> caller of check_bytes8(), so we could remove instrumentation from the
> latter, and add one KASAN range check into the former. But I'd say
> this is the expected behavior, KASAN slows down stuff and I don't
> think it makes much sense to enable it together with other memory
> debugging options.
>
Yes, just very slow.
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prev parent reply other threads:[~2019-02-19 19:08 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-14 3:32 livelock with KASAN_SW_TAGS Qian Cai
2019-02-14 16:35 ` Will Deacon
2019-02-14 16:50 ` Qian Cai
2019-02-14 18:01 ` Will Deacon
2019-02-15 4:04 ` Qian Cai
2019-02-15 14:23 ` Will Deacon
2019-02-15 14:26 ` Will Deacon
2019-02-19 17:56 ` Andrey Konovalov
[not found] ` <1550601754.6911.41.camel@lca.pw>
2019-02-19 18:56 ` soft lockups with SLAB_CONSISTENCY_CHECKS + KASAN_SW_TAGS (was: livelock with KASAN_SW_TAGS) Andrey Konovalov
2019-02-19 19:08 ` Qian Cai [this message]
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