linux-kernel - Re: [PATCH 5.10 004/126] ext4: shrink race window in ext4_should_retry

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Message-ID: <20210405152908.GA32232@amd>
Date:   Mon, 5 Apr 2021 17:29:08 +0200
From:   Pavel Machek <pavel@....cz>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        Eric Whitney <enwlinux@...il.com>,
        Theodore Tso <tytso@....edu>, Sasha Levin <sashal@...nel.org>
Subject: Re: [PATCH 5.10 004/126] ext4: shrink race window in
 ext4_should_retry_alloc()

Hi!

> From: Eric Whitney <enwlinux@...il.com>

> A per filesystem percpu counter exported via sysfs is added to allow
> users or developers to track the number of times the retry limit is
> exceeded without resorting to debugging methods.  This should provide
> some insight into worst case retry behavior.

This adds new counter exported via sysfs, but no documentation of that
counter...

Best regards,
								Pavel

> @@ -257,6 +259,7 @@ static struct attribute *ext4_attrs[] = {
>  	ATTR_LIST(session_write_kbytes),
>  	ATTR_LIST(lifetime_write_kbytes),
>  	ATTR_LIST(reserved_clusters),
> +	ATTR_LIST(sra_exceeded_retry_limit),
>  	ATTR_LIST(inode_readahead_blks),
>  	ATTR_LIST(inode_goal),
>  	ATTR_LIST(mb_stats),

-- 
http://www.livejournal.com/~pavelmachek

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