linux-kernel - Re: [PATCH v5 00/16] block: add blktrace support for zoned block devies

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Message-Id: <176115326663.119946.495631617143867642.b4-ty@kernel.dk>
Date: Wed, 22 Oct 2025 11:14:26 -0600
From: Jens Axboe <axboe@...nel.dk>
To: Johannes Thumshirn <johannes.thumshirn@....com>
Cc: chaitanyak@...dia.com, dlemoal@...nel.org, hare@...e.de, hch@....de, 
 john.g.garry@...cle.com, linux-block@...r.kernel.org, 
 linux-btrace@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-trace-kernel@...r.kernel.org, martin.petersen@...cle.com, 
 mathieu.desnoyers@...icios.com, mhiramat@...nel.org, naohiro.aota@....com, 
 rostedt@...dmis.org, shinichiro.kawasaki@....com
Subject: Re: [PATCH v5 00/16] block: add blktrace support for zoned block
 devies


On Wed, 22 Oct 2025 13:40:59 +0200, Johannes Thumshirn wrote:
> This patch series extends the kernel blktrace infrastructure to support
> tracing zoned block device commands. Zoned block devices (e.g., ZAC/ZBC and
> ZNS) introduce command types such as zone open, close, reset, finish, and zone
> append. These are currently not visible in blktrace, making it difficult to
> debug and analyze I/O workloads on zoned devices.
> 
> The patches in this series utilize the new trace points for these zone
> management operations, and propagate the necessary context to the blktrace
> logging path. These additions are designed to be backward-compatible, and are
> only active when zoned devices are in use.
> 
> [...]

Applied, thanks!

[01/16] blktrace: only calculate trace length once
        commit: a65988a0ad047dbdb8a1eb6f07540b980858b522
[02/16] blktrace: factor out recording a blktrace event
        commit: 472eca538358fc8a56884a8adb0cc6047bf05cf3
[03/16] blktrace: split out relaying a blktrace event
        commit: 04678e72e95f4165d58442b3ed108e06605984df
[04/16] blktrace: untangle if/else sequence in __blk_add_trace
        commit: 70e3c62b891281b94b9d449a381e033ce592acc8
[05/16] blktrace: change the internal action to 64bit
        commit: 370cd70a402f972f6d7a7e54ba5a82d1a72c762f
[06/16] blktrace: split do_blk_trace_setup into two functions
        commit: 42da88a724d8a3b92ade35ae2ef4d5e5a491df2d
[07/16] blktrace: add definitions for blk_user_trace_setup2
        commit: 0d8627cc936de8ea04f3cc1e6921c63fb72cc199
[08/16] blktrace: pass blk_user_trace2 to setup functions
        commit: 113cbd62824afdf62d2f3f092809cf37cc7f1dd8
[09/16] blktrace: add definitions for struct blk_io_trace2
        commit: c44347d606260f36a81f6d8415a5af33cb3015fa
[10/16] blktrace: differentiate between blk_io_trace versions
        commit: 915bb53860c3a6cc3dd2c9a5e0d1988ada0e377d
[11/16] blktrace: move trace_note to blk_io_trace2
        commit: 67bfa74d81bae9271f6ec72d2058d081732949cb
[12/16] blktrace: move ftrace blk_io_tracer to blk_io_trace2
        commit: 4d8bc7bd4f73c6b34ba29d3e8277864c6e0a44a7
[13/16] blktrace: add block trace commands for zone operations
        commit: f9ee38bbf70fb20584625849a253c8652176fa66
[14/16] blktrace: expose ZONE APPEND completions to blktrace
        commit: 1c164fcc1b08e75f1cad1532718f09cddc0ddebe
[15/16] blktrace: trace zone write plugging operations
        commit: 3f6722816a73e2017599d965683dbe71833afd7a
[16/16] blktrace: handle BLKTRACESETUP2 ioctl
        commit: 4ae8efb4f907383a16abf3c59b353763e31ae106

Best regards,
-- 
Jens Axboe