From: Joe Thornber <thornber@redhat.com>
To: Mikulas Patocka <mpatocka@redhat.com>
Cc: dm-devel@redhat.com, ejt@redhat.com, Mike Snitzer <snitzer@redhat.com>
Subject: Re: [for-3.19 PATCH v2 01/17] dm bufio: switch from a huge hash table to an rbtree
Date: Wed, 22 Oct 2014 10:41:09 +0100 [thread overview]
Message-ID: <20141022094109.GA26664@debian> (raw)
In-Reply-To: <alpine.LRH.2.02.1410211842110.10775@file01.intranet.prod.int.rdu2.redhat.com>
On Tue, Oct 21, 2014 at 06:48:00PM -0400, Mikulas Patocka wrote:
> I wonder if we need this patch if it doesn't really help performance.
I wasn't concerned with performance. I just thought it absurd that
bufio was evicting all my metadata yet using 8m per client for a hash
table.
- Joe
next prev parent reply other threads:[~2014-10-22 9:41 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-17 6:06 [for-3.19 PATCH 00/17] dm thin: performance improvements Mike Snitzer
2014-10-17 6:06 ` [for-3.19 PATCH 01/17] dm bufio: switch from a huge hash table to an rbtree Mike Snitzer
2014-10-17 6:06 ` [for-3.19 PATCH 02/17] dm bufio: evict buffers that are past the max age but retain some buffers Mike Snitzer
2014-10-17 6:06 ` [for-3.19 PATCH 03/17] dm bio prison: switch to using a red black tree Mike Snitzer
2014-10-17 6:06 ` [for-3.19 PATCH 04/17] dm thin metadata: change dm_thin_find_block to allow blocking, but not issuing, IO Mike Snitzer
2014-10-17 6:06 ` [for-3.19 PATCH 05/17] dm transaction manager: add support for prefetching blocks of metadata Mike Snitzer
2014-10-17 6:06 ` [for-3.19 PATCH 06/17] dm thin: prefetch missing metadata pages Mike Snitzer
2014-10-17 6:06 ` [for-3.19 PATCH 07/17] dm thin: throttle incoming IO Mike Snitzer
2014-10-17 6:06 ` [for-3.19 PATCH 08/17] dm thin: adjust max_sectors_kb based on thinp blocksize Mike Snitzer
2014-10-17 6:06 ` [for-3.19 PATCH 09/17] dm: improve documentation and code clarity in dm_merge_bvec Mike Snitzer
2014-10-17 6:07 ` [for-3.19 PATCH 10/17] dm thin: implement thin_merge Mike Snitzer
2014-10-17 6:07 ` [for-3.19 PATCH 11/17] dm thin: grab a virtual cell before looking up the mapping Mike Snitzer
2014-10-17 6:07 ` [for-3.19 PATCH 12/17] dm thin: performance improvement to discard processing Mike Snitzer
2014-10-17 6:07 ` [for-3.19 PATCH 13/17] dm thin: factor out remap_and_issue_overwrite Mike Snitzer
2014-10-17 6:07 ` [for-3.19 PATCH 14/17] dm thin: defer whole cells rather than individual bios Mike Snitzer
2014-10-17 6:07 ` [for-3.19 PATCH 15/17] dm thin: remap the bios in a cell immediately Mike Snitzer
2014-10-17 6:07 ` [for-3.19 PATCH 16/17] dm thin: direct dispatch when breaking sharing Mike Snitzer
2014-10-17 6:07 ` [for-3.19 PATCH 17/17] dm thin: sort the deferred cells Mike Snitzer
2014-10-17 18:31 ` [for-3.19 PATCH 00/17] dm thin: performance improvements Mike Snitzer
2014-10-17 18:37 ` [for-3.19 PATCH v2 01/17] dm bufio: switch from a huge hash table to an rbtree Mike Snitzer
2014-10-21 22:48 ` Mikulas Patocka
2014-10-22 9:41 ` Joe Thornber [this message]
2014-10-17 18:37 ` [for-3.19 PATCH v2 02/17] dm bufio: evict buffers that are past the max age but retain some buffers Mike Snitzer
2014-10-31 16:37 ` Mikulas Patocka
2014-10-17 18:37 ` [for-3.19 PATCH v2 03/17] dm bio prison: switch to using a red black tree Mike Snitzer
2014-10-17 18:37 ` [for-3.19 PATCH v2 04/17] dm thin metadata: change dm_thin_find_block to allow blocking, but not issuing, IO Mike Snitzer
2014-10-17 18:37 ` [for-3.19 PATCH v2 05/17] dm transaction manager: add support for prefetching blocks of metadata Mike Snitzer
2014-10-17 18:37 ` [for-3.19 PATCH v2 06/17] dm thin: prefetch missing metadata pages Mike Snitzer
2014-10-17 18:37 ` [for-3.19 PATCH v2 07/17] dm thin: throttle incoming IO Mike Snitzer
2014-10-17 18:37 ` [for-3.19 PATCH v2 08/17] dm thin: adjust max_sectors_kb based on thinp blocksize Mike Snitzer
2014-10-17 18:37 ` [for-3.19 PATCH v2 09/17] dm: improve documentation and code clarity in dm_merge_bvec Mike Snitzer
2014-10-17 18:37 ` [for-3.19 PATCH v2 10/17] dm thin: implement thin_merge Mike Snitzer
2014-10-17 18:37 ` [for-3.19 PATCH v2 11/17] dm thin: grab a virtual cell before looking up the mapping Mike Snitzer
2014-10-17 18:37 ` [for-3.19 PATCH v2 12/17] dm thin: performance improvement to discard processing Mike Snitzer
2014-10-17 18:37 ` [for-3.19 PATCH v2 13/17] dm thin: factor out remap_and_issue_overwrite Mike Snitzer
2014-10-17 18:37 ` [for-3.19 PATCH v2 14/17] dm thin: defer whole cells rather than individual bios Mike Snitzer
2014-10-17 18:37 ` [for-3.19 PATCH v2 15/17] dm thin: remap the bios in a cell immediately Mike Snitzer
2014-10-17 18:37 ` [for-3.19 PATCH v2 16/17] dm thin: direct dispatch when breaking sharing Mike Snitzer
2014-10-17 18:37 ` [for-3.19 PATCH v2 17/17] dm thin: sort the deferred cells Mike Snitzer
2014-10-19 23:02 ` [for-3.19 PATCH v2 fix 18/17] dm thin: fix process_shared_bio (fixes SnapshotTests) Mike Snitzer
2014-10-19 23:02 ` [for-3.19 PATCH v2 fix 19/17] dm thin: requeue deferred_cells when in requeue_mode Mike Snitzer
2014-10-19 23:02 ` [for-3.19 PATCH v2 20/17] dm thin: optimize retry_bios_on_resume Mike Snitzer
2014-10-19 23:02 ` [for-3.19 PATCH v2 21/17] dm thin: refactor requeue_io to eliminate spinlock bouncing Mike Snitzer
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