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authorLeonid Bloch <lbloch@janustech.com>2018-09-26 19:04:43 +0300
committerKevin Wolf <kwolf@redhat.com>2018-10-01 12:51:12 +0200
commitb749562d9822d14ef69c9eaa5f85903010b86c30 (patch)
treec1b104511519217d7134b190eb0f89ee498c6eab /slirp/ncsi-pkt.h
parent657ada52abb85140e56949f522ecec527b256450 (diff)
qcow2: Assign the L2 cache relatively to the image size
Sufficient L2 cache can noticeably improve the performance when using large images with frequent I/O. Previously, unless 'cache-size' was specified and was large enough, the L2 cache was set to a certain size without taking the virtual image size into account. Now, the L2 cache assignment is aware of the virtual size of the image, and will cover the entire image, unless the cache size needed for that is larger than a certain maximum. This maximum is set to 1 MB by default (enough to cover an 8 GB image with the default cluster size) but can be increased or decreased using the 'l2-cache-size' option. This option was previously documented as the *maximum* L2 cache size, and this patch makes it behave as such, instead of as a constant size. Also, the existing option 'cache-size' can limit the sum of both L2 and refcount caches, as previously. Signed-off-by: Leonid Bloch <lbloch@janustech.com> Reviewed-by: Alberto Garcia <berto@igalia.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'slirp/ncsi-pkt.h')
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