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| author | Paolo Bonzini <pbonzini@redhat.com> | 2017-06-05 14:38:58 +0200 |
|---|---|---|
| committer | Fam Zheng <famz@redhat.com> | 2017-06-16 07:55:00 +0800 |
| commit | 93001e9d87ae40e7569eb0ece0eb86d9c9582e41 (patch) | |
| tree | 5a1566507d01274c72ed7fa3cca5c845a3a7e8d5 /block/block-backend.c | |
| parent | 3b170dc86732539ebc5927880097d32d4f11df8c (diff) | |
| download | qemu-93001e9d87ae40e7569eb0ece0eb86d9c9582e41.tar.gz | |
throttle-groups: protect throttled requests with a CoMutex
Another possibility is to use tg->lock, which we're holding anyway in
both schedule_next_request and throttle_group_co_io_limits_intercept.
This would require open-coding the CoQueue however, so I've chosen this
alternative.
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20170605123908.18777-10-pbonzini@redhat.com>
Signed-off-by: Fam Zheng <famz@redhat.com>
Diffstat (limited to 'block/block-backend.c')
| -rw-r--r-- | block/block-backend.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/block/block-backend.c b/block/block-backend.c index 69d0e11466..738882dd2e 100644 --- a/block/block-backend.c +++ b/block/block-backend.c @@ -216,6 +216,7 @@ BlockBackend *blk_new(uint64_t perm, uint64_t shared_perm) blk->shared_perm = shared_perm; blk_set_enable_write_cache(blk, true); + qemu_co_mutex_init(&blk->public.throttled_reqs_lock); qemu_co_queue_init(&blk->public.throttled_reqs[0]); qemu_co_queue_init(&blk->public.throttled_reqs[1]); |