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block_util: use SmallVec in async adaptor
Also fix a comment while at it. Signed-off-by: Wei Liu <liuwe@microsoft.com>
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@ -602,7 +602,7 @@ where
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completion_list: &mut VecDeque<(u64, i32)>,
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completion_list: &mut VecDeque<(u64, i32)>,
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) -> AsyncIoResult<()> {
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) -> AsyncIoResult<()> {
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// Convert libc::iovec into IoSliceMut
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// Convert libc::iovec into IoSliceMut
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let mut slices = Vec::new();
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let mut slices: SmallVec<[IoSliceMut; 1]> = SmallVec::with_capacity(iovecs.len());
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for iovec in iovecs.iter() {
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for iovec in iovecs.iter() {
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// SAFETY: on Linux IoSliceMut wraps around libc::iovec
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// SAFETY: on Linux IoSliceMut wraps around libc::iovec
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slices.push(IoSliceMut::new(unsafe { std::mem::transmute(*iovec) }));
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slices.push(IoSliceMut::new(unsafe { std::mem::transmute(*iovec) }));
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@ -635,9 +635,9 @@ where
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completion_list: &mut VecDeque<(u64, i32)>,
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completion_list: &mut VecDeque<(u64, i32)>,
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) -> AsyncIoResult<()> {
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) -> AsyncIoResult<()> {
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// Convert libc::iovec into IoSlice
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// Convert libc::iovec into IoSlice
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let mut slices = Vec::new();
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let mut slices: SmallVec<[IoSlice; 1]> = SmallVec::with_capacity(iovecs.len());
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for iovec in iovecs.iter() {
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for iovec in iovecs.iter() {
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// SAFETY: on Linux IoSliceMut wraps around libc::iovec
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// SAFETY: on Linux IoSlice wraps around libc::iovec
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slices.push(IoSlice::new(unsafe { std::mem::transmute(*iovec) }));
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slices.push(IoSlice::new(unsafe { std::mem::transmute(*iovec) }));
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}
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}
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