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Re: Still seeing hangs in xlog_grant_log_space

To: Mark Tinguely <tinguely@xxxxxxx>
Subject: Re: Still seeing hangs in xlog_grant_log_space
From: Dave Chinner <david@xxxxxxxxxxxxx>
Date: Fri, 18 May 2012 19:37:43 +1000
Cc: Juerg Haefliger <juergh@xxxxxxxxx>, xfs@xxxxxxxxxxx
In-reply-to: <4FAB237D.5050608@xxxxxxx>
References: <CADLDEKs6oMDA-6OhmcFxyRoBVpduKtSput=53TQGn9NCAOXC1Q@xxxxxxxxxxxxxx> <20120426230738.GB9541@dastard> <CADLDEKuKLeYiqhQW0E9g_bS0VXoxPGPOck3N004Pxg4_Opbzow@xxxxxxxxxxxxxx> <20120427110922.GF9541@dastard> <CADLDEKtUHAGcOPT1jtcvyJVk+zsoL5_thYFtHJYs+w=6EGuVSA@xxxxxxxxxxxxxx> <CADLDEKs4YbNzj2c0HKHwSdUfKy0efdQRe1rOsWDkWUgd+BOGHw@xxxxxxxxxxxxxx> <20120507225944.GA5091@dastard> <20120509073507.GQ5091@dastard> <4FAADCA8.6030702@xxxxxxx> <4FAB237D.5050608@xxxxxxx>
User-agent: Mutt/1.5.21 (2010-09-15)
On Wed, May 09, 2012 at 09:10:05PM -0500, Mark Tinguely wrote:
> On 05/09/12 16:07, Mark Tinguely wrote:
> I notice in the trace_report_180secs.txt file, lsn (ail_push and the
> ungrants) displays are not correct. It acts like the BLOCK_LSN() is
> shifting too much.

What do you mean by "not correct"?

> Block sequence numbers never make it too far
> above 1100 before incrementing the cycle. I think the problem is the
> trace not the sequence numbers.

The log is only 576 filesystem blocks (which are 1k in size) long,
which means 1152 sectors, so the LSN block number portion will never
go above 1152. It looks correct to me....


Dave Chinner

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