From: Donggeun Yoo <donggeunyoo.kernel@gmail.com>
To: sashiko-reviews@lists.linux.dev
Cc: linux-trace-kernel@vger.kernel.org, linux-block@vger.kernel.org,
linux-kernel@vger.kernel.org, Jens Axboe <axboe@kernel.dk>,
Steven Rostedt <rostedt@goodmis.org>,
Masami Hiramatsu <mhiramat@kernel.org>,
Adriano Cordova <adrianox@gmail.com>,
donggeunyoo.kernel@gmail.com
Subject: Re: [PATCH] blktrace: build the synthesized v1 record from the entry's own layout
Date: Sun, 13 Sep 2026 15:37:34 +0900 [thread overview]
Message-ID: <20260913063734.708896-1-donggeunyoo.kernel@gmail.com> (raw)
In-Reply-To: <20260913031030.E85191F000FF@smtp.kernel.org>
On Sun, 13 Sep 2026 03:10:30 +0000, sashiko-bot@kernel.org wrote:
> - [Medium] Size-based differentiation between v1 and v2 events causes v1
> entries with a large PDU (>= 16 bytes) to be misidentified as v2 entries,
> scrambling output fields and truncating the PDU.
Correct. A v1 record carrying a 16-byte BLK_TA_REMAP PDU is 64 bytes, the
size of a v2 record, and nothing else in the entry tells them apart.
v2 drops the size test and depends on Adriano Cordova's "blktrace: always
record ftrace events as blk_io_trace2" instead:
https://lore.kernel.org/all/20260913063155.708520-1-donggeunyoo.kernel@gmail.com/
prev parent reply other threads:[~2026-09-13 6:37 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-13 2:58 Donggeun Yoo
[not found] ` <20260913031030.E85191F000FF@smtp.kernel.org>
2026-09-13 6:37 ` Donggeun Yoo [this message]
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