Vladimir Sementsov-Ogievskiy ebf7bba090 qcow2: do not allocate extra memory ...

There are no needs to allocate more than one cluster, as we set
avail_out for deflate to one cluster.

Zlib docs (http://www.zlib.net/manual.html) says:
"deflate compresses as much data as possible, and stops when the input
buffer becomes empty or the output buffer becomes full."

So, deflate will not write more than avail_out to output buffer. If
there is not enough space in output buffer for compressed data (it may
be larger than input data) deflate just returns Z_OK. (if all data is
compressed and written to output buffer deflate returns Z_STREAM_END).

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-id: 1468515565-81313-1-git-send-email-vsementsov@virtuozzo.com
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>

2016-07-26 17:46:37 +02:00

..

accounting.c

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archipelago.c

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backup.c

coroutine: move entry argument to qemu_coroutine_create

2016-07-13 13:26:02 +02:00

blkdebug.c

coroutine: move entry argument to qemu_coroutine_create

2016-07-13 13:26:02 +02:00

blkreplay.c

blkreplay: Switch .bdrv_co_discard() to byte-based

2016-07-20 14:11:55 +01:00

blkverify.c

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block-backend.c

block: Convert BB interface to byte-based discards

2016-07-20 14:11:55 +01:00

bochs.c

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cloop.c

…

commit.c

Improve block job rate limiting for small bandwidth values

2016-07-13 13:41:38 +02:00

crypto.c

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curl.c

…

dirty-bitmap.c

dirty-bitmap: operate with int64_t amount

2016-07-19 16:54:46 -04:00

dmg.c

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gluster.c

Merge remote-tracking branch 'remotes/stefanha/tags/block-pull-request' into staging

2016-07-21 11:00:36 +01:00

io.c

block: Kill .bdrv_co_discard()

2016-07-20 14:24:25 +01:00

iscsi.c

iscsi: Switch .bdrv_co_discard() to byte-based

2016-07-20 14:24:25 +01:00

linux-aio.c

linux-aio: prevent submitting more than MAX_EVENTS

2016-07-18 15:10:52 +01:00

Makefile.objs

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mirror.c

Merge remote-tracking branch 'remotes/mst/tags/for_upstream' into staging

2016-07-21 20:12:37 +01:00

nbd-client.c

nbd: Convert to byte-based interface

2016-07-20 14:24:25 +01:00

nbd-client.h

nbd: Convert to byte-based interface

2016-07-20 14:24:25 +01:00

nbd.c

nbd: Convert to byte-based interface

2016-07-20 14:24:25 +01:00

nfs.c

coroutine: move entry argument to qemu_coroutine_create

2016-07-13 13:26:02 +02:00

null.c

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parallels.c

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qapi.c

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qcow2-cache.c

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qcow2-cluster.c

qcow2: Fix qcow2_get_cluster_offset()

2016-07-13 13:41:38 +02:00

qcow2-refcount.c

block: Convert bdrv_discard() to byte-based

2016-07-20 14:11:55 +01:00

qcow2-snapshot.c

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qcow2.c

qcow2: do not allocate extra memory

2016-07-26 17:46:37 +02:00

qcow2.h

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qcow.c

qcow2: do not allocate extra memory

2016-07-26 17:46:37 +02:00

qed-check.c

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qed-cluster.c

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qed-gencb.c

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qed-l2-cache.c

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qed-table.c

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qed.c

coroutine: move entry argument to qemu_coroutine_create

2016-07-13 13:26:02 +02:00

qed.h

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quorum.c

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raw_bsd.c

raw_bsd: Convert to byte-based interface

2016-07-20 14:24:25 +01:00

raw-posix.c

block: Convert .bdrv_aio_discard() to byte-based

2016-07-20 14:11:55 +01:00

raw-win32.c

raw-posix: Switch paio_submit() to byte-based

2016-07-20 14:11:55 +01:00

rbd.c

block: Convert .bdrv_aio_discard() to byte-based

2016-07-20 14:11:55 +01:00

sheepdog.c

sheepdog: Switch .bdrv_co_discard() to byte-based

2016-07-20 14:24:25 +01:00

snapshot.c

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ssh.c

coroutine: move entry argument to qemu_coroutine_create

2016-07-13 13:26:02 +02:00

stream.c

Improve block job rate limiting for small bandwidth values

2016-07-13 13:41:38 +02:00

throttle-groups.c

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trace-events

raw-posix: Switch paio_submit() to byte-based

2016-07-20 14:11:55 +01:00

vdi.c

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vhdx-endian.c

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vhdx-log.c

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vhdx.c

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vhdx.h

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vmdk.c

vmdk: fix metadata write regression

2016-07-13 13:41:39 +02:00

vpc.c

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vvfat.c

vvfat: Fix qcow write target driver specification

2016-07-13 13:41:39 +02:00

win32-aio.c

linux-aio: share one LinuxAioState within an AioContext

2016-07-18 15:09:31 +01:00

write-threshold.c

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