From: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
To: qemu-block@nongnu.org
Cc: fam@euphon.net, kwolf@redhat.com, vsementsov@virtuozzo.com,
qemu-devel@nongnu.org, mreitz@redhat.com, den@openvz.org,
jsnow@redhat.com
Subject: [PATCH v2 0/5] active-mirror: support unaligned guest operations
Date: Fri, 11 Oct 2019 12:07:06 +0300 [thread overview]
Message-ID: <20191011090711.19940-1-vsementsov@virtuozzo.com> (raw)
Commit 9adc1cb49af8d fixed a bug about unaligned (to dirty bitmap
granularity) guest writes (and discards) by simply requesting
corresponding alignment on mirror-top filter. However forcing large
alignment obviously decreases performance of unaligned requests.
So it's time for a new solution which is in 04. And 05 reverts
9adc1cb49af8d.
v2:
01: new fix (do we need it for stable?)
02,03,05: add Max's r-b
04: fix bitmap handling
improve comments
Vladimir Sementsov-Ogievskiy (5):
hbitmap: handle set/reset with zero length
block/mirror: simplify do_sync_target_write
block/block-backend: add blk_co_pwritev_part
block/mirror: support unaligned write in active mirror
Revert "mirror: Only mirror granularity-aligned chunks"
include/sysemu/block-backend.h | 4 +
block/block-backend.c | 17 +++-
block/mirror.c | 181 ++++++++++++++++-----------------
util/hbitmap.c | 8 ++
4 files changed, 114 insertions(+), 96 deletions(-)
--
2.21.0
next reply other threads:[~2019-10-11 9:17 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-11 9:07 Vladimir Sementsov-Ogievskiy [this message]
2019-10-11 9:07 ` [PATCH v2 1/5] hbitmap: handle set/reset with zero length Vladimir Sementsov-Ogievskiy
2019-10-18 15:29 ` Max Reitz
2019-10-11 9:07 ` [PATCH v2 2/5] block/mirror: simplify do_sync_target_write Vladimir Sementsov-Ogievskiy
2019-10-11 9:07 ` [PATCH v2 3/5] block/block-backend: add blk_co_pwritev_part Vladimir Sementsov-Ogievskiy
2019-10-11 9:07 ` [PATCH v2 4/5] block/mirror: support unaligned write in active mirror Vladimir Sementsov-Ogievskiy
2019-10-18 15:51 ` Max Reitz
2019-10-11 9:07 ` [PATCH v2 5/5] Revert "mirror: Only mirror granularity-aligned chunks" Vladimir Sementsov-Ogievskiy
2019-10-18 15:54 ` [PATCH v2 0/5] active-mirror: support unaligned guest operations Max Reitz
2019-10-18 16:11 ` Vladimir Sementsov-Ogievskiy
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