Re: [dm-devel] 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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To: Lukas Czerner <lczerner@xxxxxxxxxx>
Subject: Re: [dm-devel] 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" <martin.petersen@xxxxxxxxxx>
Date: Mon, 02 May 2011 10:50:03 -0400
Cc: "Martin K. Petersen" <martin.petersen@xxxxxxxxxx>, Christoph Hellwig <hch@xxxxxxxxxxxxx>, device-mapper development <dm-devel@xxxxxxxxxx>, Alasdair G Kergon <agk@xxxxxxxxxx>, sandeen@xxxxxxxxxx, Mike Snitzer <snitzer@xxxxxxxxxx>, DarkNovaNick@xxxxxxxxx, linux-lvm@xxxxxxxxxx, linux-ext4@xxxxxxxxxxxxxxx
In-reply-to: <alpine.LFD.2.00.1105021631590.3778@xxxxxxxxxxxxxxxxxxxxxxxxxx> (Lukas Czerner's message of "Mon, 2 May 2011 16:39:31 +0200 (CEST)")
Organization: Oracle
User-agent: Gnus/5.110013 (No Gnus v0.13) Emacs/23.2 (gnu/linux)

>>>>> "Lukas" == Lukas Czerner <lczerner@xxxxxxxxxx> writes:

Lukas> So I assume it got fixes just recently ?. I'll give it a try with
Lukas> the up-to-date kernel.

Ok, turns out the SSD I used for the test predates advertising
TRIM. Beats me why this is broken for the zeroes/!zeroes case. I'll get
it fixed...

-- 
Martin K. Petersen	Oracle Linux Engineering
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References:
- 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: [dm-devel] 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: [dm-devel] 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: [dm-devel] 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: [dm-devel] 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: [dm-devel] 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: [dm-devel] 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: [dm-devel] do not disable ext4 discards on first discard failure? [was: Re: dm snapshot: ignore discards issued to the snapshot-origin target]
  - From: Lukas Czerner

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