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| author |   Jan Beulich <JBeulich@suse.com> | 2017-01-23 08:11:37 -0700 |
|---|---|---|
| committer |   Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2017-01-23 13:27:42 -0500 |
| commit | 3b4f18843e511193e7eb616710e838f5852e661d (patch) | |
| tree | abf5739ec8edad0a94594aa2148d132ab2f20867 /tools/perf/scripts/python/syscall-counts-by-pid.py | |
| parent | xen-blkfront: feature flags handling adjustments (diff) | |
| download | linux-dev-3b4f18843e511193e7eb616710e838f5852e661d.tar.xz linux-dev-3b4f18843e511193e7eb616710e838f5852e661d.zip | |
xen-blkfront: correct maximum segment accounting
Making use of "max_indirect_segments=" has issues:
- blkfront_setup_indirect() may end up with zero psegs when PAGE_SIZE
is sufficiently much larger than XEN_PAGE_SIZE
- the variable driven by the command line option
(xen_blkif_max_segments) has a somewhat different purpose, and hence
should namely never end up being zero
- as long as the specified value is lower than the legacy default,
we better don't use indirect segments at all (or we'd in fact lower
throughput)
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'tools/perf/scripts/python/syscall-counts-by-pid.py')
0 files changed, 0 insertions, 0 deletions