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| author | Stefan Hajnoczi | 2018-04-27 18:23:12 +0200 |
|---|---|---|
| committer | Stefan Hajnoczi | 2018-05-11 17:43:05 +0200 |
| commit | 31be8a2a97ecba7d31a82932286489cac318e9e9 (patch) | |
| tree | fda46bdc3f416a03f950e61621a0397e46665b5f /scripts | |
| parent | block/file-posix: implement bdrv_co_invalidate_cache() on Linux (diff) | |
| download | qemu-31be8a2a97ecba7d31a82932286489cac318e9e9.tar.gz qemu-31be8a2a97ecba7d31a82932286489cac318e9e9.tar.xz qemu-31be8a2a97ecba7d31a82932286489cac318e9e9.zip | |
block/file-posix: add x-check-page-cache=on|off option
mincore(2) checks whether pages are resident. Use it to verify that
page cache has been dropped.
You can trigger a verification failure by mmapping the image file from
another process that loads a byte from a page, forcing it to become
resident. bdrv_co_invalidate_cache() will fail while that process is
alive.
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
Message-id: 20180427162312.18583-3-stefanha@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'scripts')
0 files changed, 0 insertions, 0 deletions