From: NeilBrown <neilb@suse.de>
To: Yuanhan Liu <yuanhan.liu@linux.intel.com>
Cc: linux-raid@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 3/3] md/raid5: per hash value and exclusive wait_for_stripe
Date: Thu, 14 May 2015 15:45:11 +1000 [thread overview]
Message-ID: <20150514154511.26b74f5b@notabene.brown> (raw)
In-Reply-To: <1430275735-20290-3-git-send-email-yuanhan.liu@linux.intel.com>
[-- Attachment #1: Type: text/plain, Size: 1349 bytes --]
On Wed, 29 Apr 2015 10:48:55 +0800 Yuanhan Liu <yuanhan.liu@linux.intel.com>
wrote:
> diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
> index 64d5bea..697d77a 100644
> --- a/drivers/md/raid5.c
> +++ b/drivers/md/raid5.c
> @@ -344,7 +344,8 @@ static void release_inactive_stripe_list(struct r5conf *conf,
> int hash)
> {
> int size;
> - bool do_wakeup = false;
> + unsigned long do_wakeup = 0;
> + int i = 0;
> unsigned long flags;
>
> if (hash == NR_STRIPE_HASH_LOCKS) {
> @@ -365,15 +366,19 @@ static void release_inactive_stripe_list(struct r5conf *conf,
> !list_empty(list))
> atomic_dec(&conf->empty_inactive_list_nr);
> list_splice_tail_init(list, conf->inactive_list + hash);
> - do_wakeup = true;
> + do_wakeup |= 1 << (size - 1);
> spin_unlock_irqrestore(conf->hash_locks + hash, flags);
> }
> size--;
> hash--;
> }
>
> + for (i = 0; i < NR_STRIPE_HASH_LOCKS; i++) {
> + if (do_wakeup & (1 << i))
> + wake_up(&conf->wait_for_stripe[i]);
> + }
> +
hi,
I've been doing some testing and got a lock-up in resize_stripes, waiting
on wait_for_stripe[].
Looking at the above code, I think
do_wakeup |= 1 << (size - 1);
should be
do_wakeup |= 1 << hash;
do you agree? Or am I missing something?
Thanks,
NeilBrown
[-- Attachment #2: OpenPGP digital signature --]
[-- Type: application/pgp-signature, Size: 811 bytes --]
next prev parent reply other threads:[~2015-05-14 5:45 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-04-29 2:48 [PATCH 1/3 v2] wait: introduce wait_event_exclusive_cmd Yuanhan Liu
2015-04-29 2:48 ` [PATCH 2/3] md/raid5: split wait_for_stripe and introduce wait_for_quiescent Yuanhan Liu
2015-04-29 2:48 ` [PATCH 3/3] md/raid5: per hash value and exclusive wait_for_stripe Yuanhan Liu
2015-04-29 2:48 ` Yuanhan Liu
2015-05-14 5:45 ` NeilBrown [this message]
2015-05-14 5:55 ` Yuanhan Liu
2015-05-14 6:09 ` NeilBrown
2015-04-29 9:31 ` [PATCH 1/3 v2] wait: introduce wait_event_exclusive_cmd Peter Zijlstra
2015-04-29 22:17 ` NeilBrown
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=20150514154511.26b74f5b@notabene.brown \
--to=neilb@suse.de \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-raid@vger.kernel.org \
--cc=yuanhan.liu@linux.intel.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
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.