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355ee2d0e8
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Alberto Garcia 355ee2d0e8 qcow2: mark the memory as no longer needed after qcow2_cache_empty() 
After having emptied the cache, the data in the cache tables is no
longer useful, so we can tell the kernel that we are done with it. In
Linux this frees the resources associated with it.

The effect of this can be seen in the HMP commit operation: it moves
data from the top to the base image (and fills both caches), then it
empties the top image. At this point the data in that cache is no
longer needed so it's just wasting memory.

Signed-off-by: Alberto Garcia <berto@igalia.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-id: 08538b098e1faf6c92496477cf9b47a20e5aacea.1438690126.git.berto@igalia.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
2015-09-04 21:00:32 +02:00
..
accounting.c block: add accounting for merged requests 2015-02-06 17:24:21 +01:00
archipelago.c block: remove superfluous '\n' around error_report/error_setg 2015-03-10 08:15:33 +03:00
backup.c block: keep bitmap if incremental backup job is cancelled 2015-07-14 21:50:13 -04:00
blkdebug.c block: Move flag inheritance to bdrv_open_inherit() 2015-06-12 17:04:59 +02:00
blkverify.c block: Move flag inheritance to bdrv_open_inherit() 2015-06-12 17:04:59 +02:00
block-backend.c block-backend: Introduce blk_drain() 2015-06-23 15:06:16 +01:00
bochs.c block: Use g_new() & friends to avoid multiplying sizes 2014-08-20 11:51:28 +02:00
cloop.c cloop: Handle failure for potentially large allocations 2014-08-15 15:07:15 +02:00
commit.c Include qapi/qmp/qerror.h exactly where needed 2015-06-22 18:20:41 +02:00
curl.c block/curl: Don't lose original error when a connection fails. 2015-07-14 21:50:13 -04:00
dmg.c qerror: Move #include out of qerror.h 2015-06-22 18:20:40 +02:00
gluster.c block: don't convert file size to sector size 2014-09-12 15:43:06 +02:00
io.c block: update bdrv_drain_all()/bdrv_drain() comments 2015-07-07 10:31:08 +01:00
iscsi.c block/iscsi: restore compatiblity with libiscsi 1.9.0 2015-07-02 10:06:23 +01:00
linux-aio.c linux-aio: simplify removal of completed iocbs from the list 2014-12-12 16:57:55 +00:00
Makefile.objs block: convert quorum blockdrv to use crypto APIs 2015-07-08 13:11:01 +02:00
mirror.c block: more check for replaced node 2015-09-02 14:56:39 +01:00
nbd-client.c nbd: Set block size to BDRV_SECTOR_SIZE 2015-03-18 12:07:01 +01:00
nbd-client.h nbd: Set block size to BDRV_SECTOR_SIZE 2015-03-18 12:07:01 +01:00
nbd.c nbd: Fix nbd_establish_connection()'s return value 2015-03-18 12:05:38 +01:00
nfs.c block/nfs: limit maximum readahead size to 1MB 2015-07-02 10:06:23 +01:00
null.c block/null: Support reopen 2015-04-28 15:36:09 +02:00
parallels.c block/parallels: improve image writing performance further 2015-05-22 09:37:32 +01:00
qapi.c qerror: Finally unused, clean up 2015-06-22 18:20:40 +02:00
qcow2-cache.c qcow2: mark the memory as no longer needed after qcow2_cache_empty() 2015-09-04 21:00:32 +02:00
qcow2-cluster.c block: convert qcow/qcow2 to use generic cipher API 2015-07-08 13:11:01 +02:00
qcow2-refcount.c qcow2: Handle EAGAIN returned from update_refcount 2015-07-02 09:20:18 +01:00
qcow2-snapshot.c qerror: Move #include out of qerror.h 2015-06-22 18:20:40 +02:00
qcow2.c block: convert qcow/qcow2 to use generic cipher API 2015-07-08 13:11:01 +02:00
qcow2.h block: convert qcow/qcow2 to use generic cipher API 2015-07-08 13:11:01 +02:00
qcow.c block: convert qcow/qcow2 to use generic cipher API 2015-07-08 13:11:01 +02:00
qed-check.c block: Use g_new() & friends to avoid multiplying sizes 2014-08-20 11:51:28 +02:00
qed-cluster.c Use glib memory allocation and free functions 2011-08-20 23:01:08 -05:00
qed-gencb.c block: Rename BlockDriverCompletionFunc to BlockCompletionFunc 2014-10-20 13:41:27 +02:00
qed-l2-cache.c qed: do not evict in-use L2 table cache entries 2012-03-12 15:14:06 +01:00
qed-table.c block: Rename BlockDriverCompletionFunc to BlockCompletionFunc 2014-10-20 13:41:27 +02:00
qed.c qerror: Clean up QERR_ macros to expand into a single string 2015-06-22 18:20:40 +02:00
qed.h qed: Really remove unused field QEDAIOCB.finished 2015-02-06 17:24:21 +01:00
quorum.c block: don't register quorum driver if SHA256 support is unavailable 2015-08-05 15:19:32 +01:00
raw_bsd.c block: Add driver methods to probe blocksizes and geometry 2015-03-10 14:02:22 +01:00
raw-aio.h linux-aio: drop return code from laio_io_unplug and ioq_submit 2014-12-12 16:57:55 +00:00
raw-posix.c block/raw-posix: Use raw_normalize_devicepath() 2015-09-04 20:59:48 +02:00
raw-win32.c qerror: Move #include out of qerror.h 2015-06-22 18:20:40 +02:00
rbd.c rbd: fix ceph settings precedence 2015-07-14 17:15:23 +02:00
sheepdog.c sheepdog: serialize requests to overwrapping area 2015-07-28 00:16:57 -04:00
snapshot.c block: Use bdrv_drain to replace uncessary bdrv_drain_all 2015-07-07 14:27:14 +01:00
ssh.c block/ssh: Avoid segfault if inet_connect doesn't set errno. 2015-07-28 00:19:05 -04:00
stream.c Include qapi/qmp/qerror.h exactly where needed 2015-06-22 18:20:41 +02:00
throttle-groups.c throttle: Check current timers before updating any_timer_armed[] 2015-06-23 15:06:16 +01:00
vdi.c block: use bdrv_get_device_or_node_name() in error messages 2015-04-28 15:36:09 +02:00
vhdx-endian.c block: VHDX endian fixes 2014-08-15 15:07:14 +02:00
vhdx-log.c qerror: Move #include out of qerror.h 2015-06-22 18:20:40 +02:00
vhdx.c block: use bdrv_get_device_or_node_name() in error messages 2015-04-28 15:36:09 +02:00
vhdx.h block: vhdx - update PAYLOAD_BLOCK_UNMAPPED value to match 1.00 spec 2014-12-12 15:42:22 +00:00
vmdk.c Include qapi/qmp/qerror.h exactly where needed 2015-06-22 18:20:41 +02:00
vpc.c block: vpc - prevent overflow if max_table_entries >= 0x40000000 2015-07-27 17:19:06 +02:00
vvfat.c vvfat: add a label option 2015-06-23 15:06:17 +01:00
win32-aio.c block: Rename BlockDriverCompletionFunc to BlockCompletionFunc 2014-10-20 13:41:27 +02:00
write-threshold.c block: Fix block-set-write-threshold not to use funky error class 2015-03-16 17:07:25 +01:00