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| author | Alexander Yarygin <yarygin@linux.vnet.ibm.com> | 2015-06-10 14:38:17 +0300 |
|---|---|---|
| committer | Stefan Hajnoczi <stefanha@redhat.com> | 2015-06-23 15:06:16 +0100 |
| commit | f406c03c093f1451ac0ba7fde31eeb78e5e5e417 (patch) | |
| tree | 52b1a39551c0db3c413c42e49ec3e9f01f800dc6 /qdev-monitor.c | |
| parent | a3206972a9eab65ec8e8f9ae320ad628ba4b58f1 (diff) | |
block: Let bdrv_drain_all() to call aio_poll() for each AioContext
After the commit 9b536adc ("block: acquire AioContext in
bdrv_drain_all()") the aio_poll() function got called for every
BlockDriverState, in assumption that every device may have its own
AioContext. If we have thousands of disks attached, there are a lot of
BlockDriverStates but only a few AioContexts, leading to tons of
unnecessary aio_poll() calls.
This patch changes the bdrv_drain_all() function allowing it find shared
AioContexts and to call aio_poll() only for unique ones.
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Cornelia Huck <cornelia.huck@de.ibm.com>
Cc: Kevin Wolf <kwolf@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Alexander Yarygin <yarygin@linux.vnet.ibm.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Tested-by: Christian Borntraeger <borntraeger@de.ibm.com>
Message-id: 1433936297-7098-4-git-send-email-yarygin@linux.vnet.ibm.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'qdev-monitor.c')
0 files changed, 0 insertions, 0 deletions