From: Ming Lei <ming.lei@redhat.com>
To: Stephen Rust <srust@blockbridge.com>
Cc: Rob Townley <rob.townley@gmail.com>,
Christoph Hellwig <hch@lst.de>, Jens Axboe <axboe@kernel.dk>,
linux-block@vger.kernel.org, linux-rdma@vger.kernel.org,
linux-scsi@vger.kernel.org, martin.petersen@oracle.com,
target-devel@vger.kernel.org
Subject: Re: Data corruption in kernel 5.1+ with iSER attached ramdisk
Date: Tue, 3 Dec 2019 12:15:04 +0800 [thread overview]
Message-ID: <20191203041504.GC6245@ming.t460p> (raw)
In-Reply-To: <CAAFE1besnb=HV4C_buORYpWbkXecmtybwX8d_Ka2NsKmiym53w@mail.gmail.com>
On Mon, Dec 02, 2019 at 10:26:28PM -0500, Stephen Rust wrote:
> > oops, it should have been (arg4 & 511) != 0.
>
> Yep, there they are:
>
> # /usr/share/bcc/tools/trace -K 'bio_add_page ((arg4 & 511) != 0) "%d
> %d", arg3, arg4'
> PID TID COMM FUNC -
> 7411 7411 kworker/31:1H bio_add_page 512 76
> bio_add_page+0x1 [kernel]
> sbc_execute_rw+0x28 [kernel]
> __target_execute_cmd+0x2e [kernel]
> target_execute_cmd+0x1c1 [kernel]
> iscsit_execute_cmd+0x1e7 [kernel]
> iscsit_sequence_cmd+0xdc [kernel]
> isert_recv_done+0x780 [kernel]
> __ib_process_cq+0x78 [kernel]
> ib_cq_poll_work+0x29 [kernel]
> process_one_work+0x179 [kernel]
> worker_thread+0x4f [kernel]
> kthread+0x105 [kernel]
> ret_from_fork+0x1f [kernel]
>
> 7753 7753 kworker/26:1H bio_add_page 4096 76
The issue should be in brd_make_request() which assumes that
bvec.bv_len is 512bytes align.
I will figure out one patch for you tomorrow.
Thanks,
Ming
prev parent reply other threads:[~2019-12-03 4:15 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CAAFE1bd9wuuobpe4VK7Ty175j7mWT+kRmHCNhVD+6R8MWEAqmw@mail.gmail.com>
2019-11-28 1:57 ` Data corruption in kernel 5.1+ with iSER attached ramdisk Ming Lei
[not found] ` <CA+VdTb_-CGaPjKUQteKVFSGqDz-5o-tuRRkJYqt8B9iOQypiwQ@mail.gmail.com>
2019-11-28 2:58 ` Ming Lei
[not found] ` <CAAFE1bfsXsKGyw7SU_z4NanT+wmtuJT=XejBYbHHMCDQwm73sw@mail.gmail.com>
2019-11-28 4:25 ` Stephen Rust
2019-11-28 5:51 ` Rob Townley
2019-11-28 9:12 ` Ming Lei
2019-12-02 18:42 ` Stephen Rust
2019-12-03 0:58 ` Ming Lei
2019-12-03 3:04 ` Stephen Rust
2019-12-03 3:14 ` Ming Lei
2019-12-03 3:26 ` Stephen Rust
2019-12-03 3:50 ` Stephen Rust
2019-12-03 12:45 ` Ming Lei
2019-12-03 19:56 ` Stephen Rust
2019-12-04 1:05 ` Ming Lei
2019-12-04 17:23 ` Stephen Rust
2019-12-04 23:02 ` Ming Lei
2019-12-05 0:16 ` Bart Van Assche
2019-12-05 14:44 ` Stephen Rust
2019-12-05 2:28 ` Stephen Rust
2019-12-05 3:05 ` Ming Lei
2019-12-05 9:17 ` Sagi Grimberg
2019-12-05 14:36 ` Stephen Rust
[not found] ` <CAAFE1beqFBQS_zVYEXFTD2qu8PAF9hBSW4j1k9ZD6MhU_gWg5Q@mail.gmail.com>
2020-03-25 0:15 ` Sagi Grimberg
2020-03-30 17:08 ` Stephen Rust
2020-03-31 1:07 ` Sagi Grimberg
2020-04-01 0:38 ` Sagi Grimberg
2020-04-02 20:03 ` Stephen Rust
2020-04-02 22:16 ` Sagi Grimberg
2019-12-04 2:39 ` Ming Lei
2019-12-03 4:15 ` Ming Lei [this message]
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