From: "Martin K. Petersen" <martin.petersen@oracle.com>
To: Jes Sorensen <Jes.Sorensen@redhat.com>
Cc: NeilBrown <neilb@suse.com>, linux-raid@vger.kernel.org
Subject: Re: [PATCH 0/1] RFC: Unreliable discard performance can cripple RAID1
Date: Wed, 24 Jun 2015 21:05:07 -0400 [thread overview]
Message-ID: <yq1k2us38e4.fsf@sermon.lab.mkp.net> (raw)
In-Reply-To: <wrfj616dtlmb.fsf@redhat.com> (Jes Sorensen's message of "Wed, 24 Jun 2015 07:02:36 -0400")
>>>>> "Jes" == Jes Sorensen <Jes.Sorensen@redhat.com> writes:
>> Or is this some non-SATA/SCSI SSD that has a 'make_request_fn'
>> driver? I think I came across one of those before (NVMe). In that
>> case - the driver needs to be fixed.
Jes> Nope the block layer doesn't merge the requests at this point.
Then something broke it. Discard merging used to work.
--
Martin K. Petersen Oracle Linux Engineering
next prev parent reply other threads:[~2015-06-25 1:05 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-24 0:26 [PATCH 0/1] RFC: Unreliable discard performance can cripple RAID1 Jes.Sorensen
2015-06-24 0:26 ` [PATCH 1/1] raid0: Disable discard per default due to performance uncertainty Jes.Sorensen
2015-06-24 5:00 ` [PATCH 0/1] RFC: Unreliable discard performance can cripple RAID1 Roman Mamedov
2015-06-24 11:04 ` Jes Sorensen
2015-06-25 1:03 ` Martin K. Petersen
2015-06-24 7:55 ` NeilBrown
2015-06-24 11:02 ` Jes Sorensen
2015-06-25 1:05 ` Martin K. Petersen [this message]
2015-07-07 4:42 ` Mike Snitzer
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=yq1k2us38e4.fsf@sermon.lab.mkp.net \
--to=martin.petersen@oracle.com \
--cc=Jes.Sorensen@redhat.com \
--cc=linux-raid@vger.kernel.org \
--cc=neilb@suse.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.