netdev.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: NeilBrown <neilb@suse.com>
To: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Thomas Graf <tgraf@suug.ch>,
	netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/8] rhashtable: silence RCU warning in rhashtable_test.
Date: Sun, 06 May 2018 07:49:40 +1000	[thread overview]
Message-ID: <87y3gxdb7v.fsf@notabene.neil.brown.name> (raw)
In-Reply-To: <20180505091046.bd74tk75oieaasi5@gondor.apana.org.au>

[-- Attachment #1: Type: text/plain, Size: 847 bytes --]

On Sat, May 05 2018, Herbert Xu wrote:

> On Fri, May 04, 2018 at 01:54:14PM +1000, NeilBrown wrote:
>> print_ht in rhashtable_test calls rht_dereference() with neither
>> RCU protection or the mutex.  This triggers an RCU warning.
>> So take the mutex to silence the warning.
>> 
>> Signed-off-by: NeilBrown <neilb@suse.com>
>
> I don't think the mutex is actually needed but since we don't
> have rht_dereference_raw and this is just test code:

I agrees there is no functional need for the mutex.  It just needed to
silence the warning, so that other warnings are easier to see.

>
> Acked-by: Herbert Xu <herbert@gondor.apana.org.au>

thanks,
NeilBrown

> -- 
> Email: Herbert Xu <herbert@gondor.apana.org.au>
> Home Page: http://gondor.apana.org.au/~herbert/
> PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt

[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 832 bytes --]

  reply	other threads:[~2018-05-05 21:49 UTC|newest]

Thread overview: 36+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-05-04  3:54 [PATCH 0/8] Assorted rhashtable fixes and cleanups NeilBrown
2018-05-04  3:54 ` [PATCH 6/8] rhashtable: further improve stability of rhashtable_walk NeilBrown
2018-05-05  9:42   ` Herbert Xu
2018-05-05 21:50     ` NeilBrown
2018-05-07  9:30       ` Herbert Xu
2018-05-08  0:54         ` NeilBrown
2018-05-04  3:54 ` [PATCH 3/8] rhashtable: use cmpxchg() to protect ->future_tbl NeilBrown
2018-05-05  9:27   ` Herbert Xu
2018-05-05 21:45     ` NeilBrown
2018-05-04  3:54 ` [PATCH 2/8] rhashtable: remove nulls_base and related code NeilBrown
2018-05-05  9:12   ` Herbert Xu
2018-05-05 21:37     ` NeilBrown
2018-05-07  9:27       ` Herbert Xu
2018-05-08  1:14         ` NeilBrown
2018-05-04  3:54 ` [PATCH 8/8] rhashtable: don't hold lock on first table throughout insertion NeilBrown
2018-05-05  9:41   ` Herbert Xu
2018-05-05 22:00     ` NeilBrown
2018-05-06  5:20       ` Herbert Xu
2018-05-06 22:24         ` NeilBrown
2018-05-07  9:29           ` Herbert Xu
2018-05-08  0:23             ` NeilBrown
2018-05-04  3:54 ` [PATCH 7/8] rhashtable: add rhashtable_walk_prev() NeilBrown
2018-05-05  9:43   ` Herbert Xu
2018-05-05 15:40     ` Tom Herbert
2018-05-06 22:16       ` NeilBrown
2018-05-04  3:54 ` [PATCH 5/8] rhashtable: remove rhashtable_walk_peek() NeilBrown
2018-05-05  9:30   ` Herbert Xu
2018-05-04  3:54 ` [PATCH 4/8] rhashtable: fix race in nested_table_alloc() NeilBrown
2018-05-05  9:29   ` Herbert Xu
2018-05-05 21:48     ` NeilBrown
2018-05-06  5:18       ` Herbert Xu
2018-05-06 22:02         ` NeilBrown
2018-05-04  3:54 ` [PATCH 1/8] rhashtable: silence RCU warning in rhashtable_test NeilBrown
2018-05-05  9:10   ` Herbert Xu
2018-05-05 21:49     ` NeilBrown [this message]
2018-05-04 17:07 ` [PATCH 0/8] Assorted rhashtable fixes and cleanups David Miller

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=87y3gxdb7v.fsf@notabene.neil.brown.name \
    --to=neilb@suse.com \
    --cc=herbert@gondor.apana.org.au \
    --cc=linux-kernel@vger.kernel.org \
    --cc=netdev@vger.kernel.org \
    --cc=tgraf@suug.ch \
    /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
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).