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| author | Peter Maydell <peter.maydell@linaro.org> | 2019-03-14 09:34:51 +0000 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2019-03-14 09:34:51 +0000 |
| commit | dbbc277510aa39ea0b7658479e4d67779dede0ea (patch) | |
| tree | 1264d7d1fe892b4a56cf53ac84167795a50a1c9f /qapi | |
| parent | abb7ede1fb60abbaf0b5dbd0e6e1d29e291d5767 (diff) | |
| parent | f357fcd890a8d6ced6d261338b859a41414561e9 (diff) | |
Merge remote-tracking branch 'remotes/stefanha/tags/block-pull-request' into staging
Pull request
* Add 'drop-cache=on|off' option to file-posix.c. The default is on.
Disabling the option fixes a QEMU 3.0.0 performance regression when live
migrating on the same host with cache.direct=off.
# gpg: Signature made Wed 13 Mar 2019 11:07:48 GMT
# gpg: using RSA key 9CA4ABB381AB73C8
# gpg: Good signature from "Stefan Hajnoczi <stefanha@redhat.com>" [full]
# gpg: aka "Stefan Hajnoczi <stefanha@gmail.com>" [full]
# Primary key fingerprint: 8695 A8BF D3F9 7CDA AC35 775A 9CA4 ABB3 81AB 73C8
* remotes/stefanha/tags/block-pull-request:
file-posix: add drop-cache=on|off option
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'qapi')
| -rw-r--r-- | qapi/block-core.json | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/qapi/block-core.json b/qapi/block-core.json index ca684a8a04..12c5e73551 100644 --- a/qapi/block-core.json +++ b/qapi/block-core.json @@ -2834,6 +2834,10 @@ # @locking: whether to enable file locking. If set to 'auto', only enable # when Open File Descriptor (OFD) locking API is available # (default: auto, since 2.10) +# @drop-cache: invalidate page cache during live migration. This prevents +# stale data on the migration destination with cache.direct=off. +# Currently only supported on Linux hosts. +# (default: on, since: 4.0) # @x-check-cache-dropped: whether to check that page cache was dropped on live # migration. May cause noticeable delays if the image # file is large, do not use in production. @@ -2846,6 +2850,8 @@ '*pr-manager': 'str', '*locking': 'OnOffAuto', '*aio': 'BlockdevAioOptions', + '*drop-cache': {'type': 'bool', + 'if': 'defined(CONFIG_LINUX)'}, '*x-check-cache-dropped': 'bool' } } ## |