From: Mike Snitzer <snitzer@redhat.com> To: Mikulas Patocka <mpatocka@redhat.com> Cc: device-mapper development <dm-devel@redhat.com>, lvm-devel@redhat.com Subject: Re: rebased snapshot-merge patches Date: Sat, 12 Sep 2009 02:56:08 -0400 [thread overview] Message-ID: <20090912065608.GA1864@redhat.com> (raw) In-Reply-To: <20090911065135.GA3210@redhat.com> On Fri, Sep 11 2009 at 2:51am -0400, Mike Snitzer <snitzer@redhat.com> wrote: > Mikulas, > > I ran with your suggestion and it works quite well (results below). ... > The changes are detailed at the end of this mail. I still have a "TODO" > that you'll see in the patch that speaks to needing to have > snapshot_merge_process() check all origin chunks via __chunk_is_tracked() > rather than just the one check of the first chunk. Your feedback here > would be much appreciated. I'm not completely clear on the intent of > the __chunk_is_tracked() check there and what it now needs to do. I believe I've sorted this out. The TODO should've read something like: snapshot_merge_process() should delay the merging of _all_ chunks that have in-progress writes; not just the first chunk in the region that is to be merged. The revised patch (relative to Jon's unified snapshot tree) is here: http://people.redhat.com/msnitzer/patches/snapshot-merge/kernel_unified/2.6.31/dm-snapshot-merge-use-larger-io-when-merging.patch Pretty sure it _should_ work; but can't test until we get this unified snapshot patchset working properly. -- lvm-devel mailing list lvm-devel@redhat.com https://www.redhat.com/mailman/listinfo/lvm-devel
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From: Mike Snitzer <snitzer@redhat.com> To: lvm-devel@redhat.com Subject: Re: rebased snapshot-merge patches Date: Sat, 12 Sep 2009 02:56:08 -0400 [thread overview] Message-ID: <20090912065608.GA1864@redhat.com> (raw) In-Reply-To: <20090911065135.GA3210@redhat.com> On Fri, Sep 11 2009 at 2:51am -0400, Mike Snitzer <snitzer@redhat.com> wrote: > Mikulas, > > I ran with your suggestion and it works quite well (results below). ... > The changes are detailed at the end of this mail. I still have a "TODO" > that you'll see in the patch that speaks to needing to have > snapshot_merge_process() check all origin chunks via __chunk_is_tracked() > rather than just the one check of the first chunk. Your feedback here > would be much appreciated. I'm not completely clear on the intent of > the __chunk_is_tracked() check there and what it now needs to do. I believe I've sorted this out. The TODO should've read something like: snapshot_merge_process() should delay the merging of _all_ chunks that have in-progress writes; not just the first chunk in the region that is to be merged. The revised patch (relative to Jon's unified snapshot tree) is here: http://people.redhat.com/msnitzer/patches/snapshot-merge/kernel_unified/2.6.31/dm-snapshot-merge-use-larger-io-when-merging.patch Pretty sure it _should_ work; but can't test until we get this unified snapshot patchset working properly.
next prev parent reply other threads:[~2009-09-12 6:56 UTC|newest] Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top 2009-08-31 22:08 rebased snapshot-merge patches Mike Snitzer 2009-08-31 22:08 ` Mike Snitzer 2009-09-08 14:17 ` [dm-devel] " Mikulas Patocka 2009-09-08 14:17 ` Mikulas Patocka 2009-09-11 6:51 ` Mike Snitzer 2009-09-11 6:51 ` Mike Snitzer 2009-09-12 6:56 ` Mike Snitzer [this message] 2009-09-12 6:56 ` Mike Snitzer 2009-09-12 7:54 ` Mikulas Patocka 2009-09-12 7:54 ` Mikulas Patocka
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