Re: do not disable ext4 discards on first discard failure? [was: Re: dm snapshot: ignore discards issued to the snapshot-origin target]

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Subject: Re: do not disable ext4 discards on first discard failure? [was: Re: dm snapshot: ignore discards issued to the snapshot-origin target]
From: Lukas Czerner <lczerner@xxxxxxxxxx>
Date: Wed, 4 May 2011 19:35:01 +0200 (CEST)
Cc: sandeen@xxxxxxxxxx, Mike Snitzer <snitzer@xxxxxxxxxx>, Christoph Hellwig <hch@xxxxxxxxxxxxx>, device-mapper development <dm-devel@xxxxxxxxxx>, DarkNovaNick@xxxxxxxxx, linux-lvm@xxxxxxxxxx, Lukas Czerner <lczerner@xxxxxxxxxx>, linux-ext4@xxxxxxxxxxxxxxx, Alasdair G Kergon <agk@xxxxxxxxxx>
In-reply-to: <yq1boziz80x.fsf@xxxxxxxxxxxxxxxxxx>
References: <20110413224025.GA18589@xxxxxxxxxx> <20110413234854.GA19793@xxxxxxxxxx> <20110426173213.GA19604@xxxxxxxxxx> <20110428001912.GA14659@xxxxxxxxxx> <20110428075355.GA2190@xxxxxxxxxxxxx> <20110428205935.GA24979@xxxxxxxxxx> <alpine.LFD.2.00.1104291117510.5496@xxxxxxxxxxxxxxxxxxxxxxxxxx> <20110429122454.GL32370@xxxxxxxxxxxxxxxxxxxxx> <alpine.LFD.2.00.1105020857030.3778@xxxxxxxxxxxxxxxxxxxxxxxxxx> <20110502081308.GC8642@xxxxxxxxxxxxxxxxxxxxx> <20110502081925.GA11312@xxxxxxxxxxxxx> <alpine.LFD.2.00.1105021217080.3778@xxxxxxxxxxxxxxxxxxxxxxxxxx> <yq1bozl420p.fsf@xxxxxxxxxxxxxxxxxx> <alpine.LFD.2.00.1105021631590.3778@xxxxxxxxxxxxxxxxxxxxxxxxxx> <yq1tydd2g5h.fsf@xxxxxxxxxxxxxxxxxx> <alpine.LFD.2.00.1105031036090.4250@xxxxxxxxxxxxxxxxxxxxxxxxxx> <yq1wri6zel9.fsf@xxxxxxxxxxxxxxxxxx> <alpine.LFD.2.00.1105041825250.7938@xxxxxxxxxxxxxxxxxxxxxxxxxx> <yq1boziz80x.fsf@xxxxxxxxxxxxxxxxxx>
Reply-to: device-mapper development <dm-devel@xxxxxxxxxx>
User-agent: Alpine 2.00 (LFD 1167 2008-08-23)

On Wed, 4 May 2011, Martin K. Petersen wrote:

> >>>>> "Lukas" == Lukas Czerner <lczerner@xxxxxxxxxx> writes:
> 
> Lukas> Also I am not sure why this changed discard_max_bytes from
> Lukas> 4294966784 to 2147450880 in my case, that does not seem
> Lukas> right...lsblk in the first place apparently overflowed.
> 
> 2G is correct. The relevant libata patch was missing from the series I
> submitted during the merge window and I don't see it in the archives. It
> was at the end of the stack so I guess I had an off-by-one in my commit
> range...
> 

Ok, thanks.

-Lukas
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References:
- [PATCH] dm snapshot: add discard support to the snapshot-origin target [was: Re: Testing TRIM with LVM]
  - From: Mike Snitzer
- Re: dm snapshot: add discard support to the snapshot-origin target [was: Re: Testing TRIM with LVM]
  - From: Mike Snitzer
- Re: dm snapshot: add discard support to the snapshot-origin target [was: Re: Testing TRIM with LVM]
  - From: Mike Snitzer
- [PATCH] dm snapshot: ignore discards issued to the snapshot-origin target
  - From: Mike Snitzer
- Re: [PATCH] dm snapshot: ignore discards issued to the snapshot-origin target
  - From: Christoph Hellwig
- do not disable ext4 discards on first discard failure? [was: Re: dm snapshot: ignore discards issued to the snapshot-origin target]
  - From: Mike Snitzer
- Re: do not disable ext4 discards on first discard failure? [was: Re: dm snapshot: ignore discards issued to the snapshot-origin target]
  - From: Lukas Czerner
- Re: do not disable ext4 discards on first discard failure? [was: Re: dm snapshot: ignore discards issued to the snapshot-origin target]
  - From: Alasdair G Kergon
- Re: do not disable ext4 discards on first discard failure? [was: Re: dm snapshot: ignore discards issued to the snapshot-origin target]
  - From: Lukas Czerner
- Re: do not disable ext4 discards on first discard failure? [was: Re: dm snapshot: ignore discards issued to the snapshot-origin target]
  - From: Alasdair G Kergon
- Re: do not disable ext4 discards on first discard failure? [was: Re: dm snapshot: ignore discards issued to the snapshot-origin target]
  - From: Christoph Hellwig
- Re: do not disable ext4 discards on first discard failure? [was: Re: dm snapshot: ignore discards issued to the snapshot-origin target]
  - From: Lukas Czerner
- Re: do not disable ext4 discards on first discard failure? [was: Re: dm snapshot: ignore discards issued to the snapshot-origin target]
  - From: Martin K. Petersen
- Re: do not disable ext4 discards on first discard failure? [was: Re: dm snapshot: ignore discards issued to the snapshot-origin target]
  - From: Lukas Czerner
- Re: do not disable ext4 discards on first discard failure? [was: Re: dm snapshot: ignore discards issued to the snapshot-origin target]
  - From: Martin K. Petersen
- Re: do not disable ext4 discards on first discard failure? [was: Re: dm snapshot: ignore discards issued to the snapshot-origin target]
  - From: Lukas Czerner
- Re: do not disable ext4 discards on first discard failure? [was: Re: dm snapshot: ignore discards issued to the snapshot-origin target]
  - From: Martin K. Petersen
- Re: do not disable ext4 discards on first discard failure? [was: Re: dm snapshot: ignore discards issued to the snapshot-origin target]
  - From: Lukas Czerner
- Re: do not disable ext4 discards on first discard failure? [was: Re: dm snapshot: ignore discards issued to the snapshot-origin target]
  - From: Martin K. Petersen

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