DM-Devel Archive on lore.kernel.org
 help / color / Atom feed
From: Martin Wilck <mwilck@suse.com>
To: Benjamin Marzinski <bmarzins@redhat.com>
Cc: dm-devel@redhat.com
Subject: Re: [PATCH 02/11] libmultipath: copy mpp->hwe from pp->hwe
Date: Fri, 25 Sep 2020 18:01:26 +0200
Message-ID: <f3b7a133b11ef4088948c76706ea088d40817039.camel@suse.com> (raw)
In-Reply-To: <20200924201245.GH11108@octiron.msp.redhat.com>

On Thu, 2020-09-24 at 15:12 -0500, Benjamin Marzinski wrote:
> On Thu, Sep 24, 2020 at 03:36:35PM +0200, mwilck@suse.com wrote:
> > From: Martin Wilck <mwilck@suse.com>
> > 
> > Since f0462f0 ("libmultipath: use vector for for pp->hwe and mp-
> > >hwe"),
> > we've been trying to fix issues caused by paths getting freed and
> > mpp->hwe
> > dangling. This approach couldn't work because we need mpp->hwe to
> > persist,
> > even if all paths are removed from the map. Before f0462f0, a
> > simple
> > assignment worked, because the lifetime of the hwe wasn't bound to
> > the
> > path. But now, we need to copy the vector. It turns out that we
> > need to set
> > mpp->hwe only in two places, add_map_with_path() and setup_map(),
> > and
> > that the code is simplified overall.
> 
> Unless I'm missing someting, it looks like
> __mpath_persistent_reserve_out() will call select_all_tg_pt(), which
> uses mpp->hwe, without ever setting it.  Granted, I don't see how
> this
> was supposed to work before your patch either.

Right, it doesn't. Thanks for spotting it.
Ok to create a new, separate patch for it?

Regards,
Martin

  reply index

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-24 13:36 [PATCH 00/11] multipath-tools: add linker version scripts mwilck
2020-09-24 13:36 ` [PATCH 01/11] libmultipath: find_mpe(): don't match with empty WWID mwilck
2020-09-24 13:36 ` [PATCH 02/11] libmultipath: copy mpp->hwe from pp->hwe mwilck
2020-09-24 20:12   ` Benjamin Marzinski
2020-09-25 16:01     ` Martin Wilck [this message]
2020-09-25 16:06       ` Benjamin Marzinski
2020-09-24 13:36 ` [PATCH 03/11] libmultipath: dm_map_present_by_uuid(): fix dm_task_create() call mwilck
2020-09-24 13:36 ` [PATCH 04/11] libdmmp tests: fix compilation mwilck
2020-09-24 13:36 ` [PATCH 05/11] libmultipath: prio: constify some function parameters mwilck
2020-09-24 13:36 ` [PATCH 06/11] libmultipath: checkers/prio: allow non-lazy .so loading mwilck
2020-09-24 20:27   ` Benjamin Marzinski
2020-09-24 13:36 ` [PATCH 07/11] multipath-tools Makefiles: separate rules for .so and man pages mwilck
2020-09-24 13:36 ` [PATCH 08/11] libmultipath: create separate .so for unit tests mwilck
2020-09-24 23:35   ` Benjamin Marzinski
2020-09-24 13:36 ` [PATCH 09/11] libmultipath: add linker version script mwilck
2020-09-24 13:36 ` [PATCH 10/11] libmpathpersist: " mwilck
2020-09-25  4:00   ` Benjamin Marzinski
2020-09-25 19:52     ` Martin Wilck
2020-09-25 22:10       ` Benjamin Marzinski
     [not found]         ` <20200925223207.GC3384@octiron.msp.redhat.com>
     [not found]           ` <c0a1e44fcc819583d972884aa126c486fc784fa9.camel@suse.com>
2020-09-25 23:22             ` Benjamin Marzinski
2020-09-24 13:36 ` [PATCH 11/11] libmpathcmd: " mwilck
2020-09-25  2:09 ` [PATCH 00/11] multipath-tools: add linker version scripts Benjamin Marzinski
2020-09-25 19:53   ` Martin Wilck

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=f3b7a133b11ef4088948c76706ea088d40817039.camel@suse.com \
    --to=mwilck@suse.com \
    --cc=bmarzins@redhat.com \
    --cc=dm-devel@redhat.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

DM-Devel Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/dm-devel/0 dm-devel/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 dm-devel dm-devel/ https://lore.kernel.org/dm-devel \
		dm-devel@redhat.com
	public-inbox-index dm-devel

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/com.redhat.dm-devel


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