Kernel Newbies archive on lore.kernel.org
 help / color / Atom feed
From: "Valdis Klētnieks" <valdis.kletnieks@vt.edu>
To: Subhashini Rao Beerisetty <subhashbeerisetty@gmail.com>
Cc: linux-kernel@vger.kernel.org,
	kernelnewbies <kernelnewbies@kernelnewbies.org>
Subject: Re: general protection fault vs Oops
Date: Sat, 16 May 2020 09:53:13 -0400
Message-ID: <374485.1589637193@turing-police> (raw)
In-Reply-To: <CAPY=qRQ6gzN1BWh=ianVDBQ1C9kibWHwxs5Z0+QSwGxKymLDTQ@mail.gmail.com>

[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #1.1: Type: text/plain; charset=us-ascii, Size: 1938 bytes --]

On Sat, 16 May 2020 18:05:07 +0530, Subhashini Rao Beerisetty said:

> In the first attempt when I run that test case I landed into “general
> protection fault: 0000 [#1] SMP" .. Next I rebooted and ran the same
> test , but now it resulted the “Oops: 0002 [#1] SMP".

And the 0002 is telling you that there's been 2 previous bug/oops since the
reboot, so you need to go back through your dmesg and find the *first* one.

> In both cases the call trace looks exactly same and RIP points to
> “native_queued_spin_lock_slowpath+0xfe/0x170"..

The first few entries in the call trace are the oops handler itself. So...


> May 16 12:06:17 test-pc kernel: [96934.567347] Call Trace:
> May 16 12:06:17 test-pc kernel: [96934.569475]  [<ffffffff8183c427>]__raw_spin_lock_irqsave+0x37/0x40
> May 16 12:06:17 test-pc kernel: [96934.571686]  [<ffffffffc0606812>] event_raise+0x22/0x60 [osa]
> May 16 12:06:17 test-pc kernel: [96934.573935]  [<ffffffffc06aa2a4>] multi_q_completed_one_buffer+0x34/0x40 [mcore]

The above line is the one where you hit the wall.

> May 16 12:59:22 test-pc kernel: [ 3011.405602] Call Trace:
> May 16 12:59:22 test-pc kernel: [ 3011.407892]  [<ffffffff8183c427>] _raw_spin_lock_irqsave+0x37/0x40
> May 16 12:59:22 test-pc kernel: [ 3011.410256]  [<ffffffffc0604812>] event_raise+0x22/0x60 [osa]
> May 16 12:59:22 test-pc kernel: [ 3011.412652]  [<ffffffffc06b72a4>] multi_q_completed_one_buffer+0x34/0x40 [mcore]

And again.

However,  given that it's a 4.4 kernel from 4 years ago, it's going to be
hard to find anybody who really cares.

In fact. I'm wondering if this is from some out-of-tree or vendor patch,
because I'm not finding any sign of that function in either the 5.7 or 4.4
tree.  Not even a sign of ## catenation abuse - no relevant hits for
"completed_one_buffer" or "multi_q" either

I don't think anybody's going to be able to help unless somebody first
identifies where that function is....


[-- Attachment #1.2: Type: application/pgp-signature, Size: 832 bytes --]

[-- Attachment #2: Type: text/plain, Size: 170 bytes --]

_______________________________________________
Kernelnewbies mailing list
Kernelnewbies@kernelnewbies.org
https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies

  reply index

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-16 12:35 Subhashini Rao Beerisetty
2020-05-16 13:53 ` Valdis Klētnieks [this message]
2020-05-16 15:10   ` Subhashini Rao Beerisetty
2020-05-16 15:59   ` Randy Dunlap
2020-05-16 16:15     ` Subhashini Rao Beerisetty
2020-05-17 20:46       ` Cong Wang
2020-05-18  5:45         ` Subhashini Rao Beerisetty

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=374485.1589637193@turing-police \
    --to=valdis.kletnieks@vt.edu \
    --cc=kernelnewbies@kernelnewbies.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=subhashbeerisetty@gmail.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

Kernel Newbies archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/kernelnewbies/0 kernelnewbies/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 kernelnewbies kernelnewbies/ https://lore.kernel.org/kernelnewbies \
		kernelnewbies@kernelnewbies.org
	public-inbox-index kernelnewbies

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.kernelnewbies.kernelnewbies


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git