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From: Paolo Bonzini <pbonzini@redhat.com>
To: Vivek Goyal <vgoyal@redhat.com>
Cc: linux-kernel@vger.kernel.org, axboe@kernel.dk,
	snitzer@redhat.com, martin.petersen@oracle.com,
	david@fromorbit.com, xfs@oss.sgi.com, dm-devel@redhat.com,
	hch@lst.de
Subject: Re: [dm-devel] [PATCH v2 1/3] block: add sysfs entry for discard_alignment
Date: Tue, 03 Jul 2012 13:51:13 +0200	[thread overview]
Message-ID: <4FF2DCB1.2090704@redhat.com> (raw)
In-Reply-To: <20120703023442.GB3586@redhat.com>

Il 03/07/2012 04:34, Vivek Goyal ha scritto:
>> > The next patches will actually use the alignment, expose it in sysfs
>> > for ease of debugging.
>> > 
> Don't we already have discard_alignment exported as device attribute.
> 
> /sys/block/<dev>/discard_alignment

Ah, interesting, I missed it completely.  I guess it's because queue/
directories only exist for full disks, and the correct alignment varies
for each partition.  So this patch is unnecessary.

Paolo

WARNING: multiple messages have this Message-ID (diff)
From: Paolo Bonzini <pbonzini@redhat.com>
To: Vivek Goyal <vgoyal@redhat.com>
Cc: axboe@kernel.dk, martin.petersen@oracle.com, snitzer@redhat.com,
	linux-kernel@vger.kernel.org, xfs@oss.sgi.com,
	dm-devel@redhat.com, hch@lst.de
Subject: Re: [dm-devel] [PATCH v2 1/3] block: add sysfs entry for discard_alignment
Date: Tue, 03 Jul 2012 13:51:13 +0200	[thread overview]
Message-ID: <4FF2DCB1.2090704@redhat.com> (raw)
In-Reply-To: <20120703023442.GB3586@redhat.com>

Il 03/07/2012 04:34, Vivek Goyal ha scritto:
>> > The next patches will actually use the alignment, expose it in sysfs
>> > for ease of debugging.
>> > 
> Don't we already have discard_alignment exported as device attribute.
> 
> /sys/block/<dev>/discard_alignment

Ah, interesting, I missed it completely.  I guess it's because queue/
directories only exist for full disks, and the correct alignment varies
for each partition.  So this patch is unnecessary.

Paolo

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  parent reply	other threads:[~2012-07-03 11:51 UTC|newest]

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-07-02 13:20 [PATCH v2 0/3] block: improvements for discard alignment Paolo Bonzini
2012-07-02 13:20 ` Paolo Bonzini
2012-07-02 13:20 ` [PATCH v2 1/3] block: add sysfs entry for discard_alignment Paolo Bonzini
2012-07-02 13:20   ` Paolo Bonzini
2012-07-03  2:34   ` [dm-devel] " Vivek Goyal
2012-07-03  2:34     ` Vivek Goyal
2012-07-03  3:59     ` Mike Snitzer
2012-07-03  3:59       ` Mike Snitzer
2012-07-03 11:51     ` Paolo Bonzini [this message]
2012-07-03 11:51       ` [dm-devel] " Paolo Bonzini
2012-07-03 14:00       ` Vivek Goyal
2012-07-03 14:00         ` Vivek Goyal
2012-07-03 14:21         ` Paolo Bonzini
2012-07-03 14:21           ` Paolo Bonzini
2012-07-03 14:39           ` Vivek Goyal
2012-07-03 14:39             ` Vivek Goyal
2012-07-03 14:40             ` Paolo Bonzini
2012-07-03 14:40               ` Paolo Bonzini
2012-07-03 14:45               ` Vivek Goyal
2012-07-03 14:45                 ` Vivek Goyal
2012-07-02 13:20 ` [PATCH v2 2/3] block: reorganize rounding of max_discard_sectors Paolo Bonzini
2012-07-02 13:20   ` Paolo Bonzini
2012-07-03  2:49   ` [dm-devel] " Vivek Goyal
2012-07-03  2:49     ` Vivek Goyal
2012-07-03 11:47     ` Paolo Bonzini
2012-07-03 11:47       ` Paolo Bonzini
2012-07-02 13:20 ` [PATCH v2 3/3] block: split discard into aligned requests Paolo Bonzini
2012-07-02 13:20   ` Paolo Bonzini

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