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30a9aa69 |
| 04-Apr-2019 |
Jean-Philippe Brucker <jean-philippe.brucker@arm.com> |
disk/aio: Refactor AIO code
Move all AIO code to a separate file, disk/aio.c, to remove as much #ifdefs as possible. Split the raw read/write disk ops into async and sync, and choose which ones to u
disk/aio: Refactor AIO code
Move all AIO code to a separate file, disk/aio.c, to remove as much #ifdefs as possible. Split the raw read/write disk ops into async and sync, and choose which ones to use depending on CONFIG_HAS_AIO. Note that we fix raw_image__close() which incorrectly checked CONFIG_HAS_VIRTIO instead of CONFIG_HAS_AIO, and closed an unitialized disk->evt. A subsequent commit will complete this refactoring by fixing use of the 'async' disk attribute.
Reviewed-by: Andre Przywara <andre.przywara@arm.com> Signed-off-by: Jean-Philippe Brucker <jean-philippe.brucker@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
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649f9515 |
| 30-Oct-2015 |
Andre Przywara <andre.przywara@arm.com> |
provide generic read_file() implementation
In various parts of kvmtool we simply try to read files into memory, but fail to do so in a safe way. The read(2) syscall can return early having only part
provide generic read_file() implementation
In various parts of kvmtool we simply try to read files into memory, but fail to do so in a safe way. The read(2) syscall can return early having only parts of the file read, or it may return -1 due to being interrupted by a signal (in which case we should simply retry). The ARM code seems to provide the only safe implementation, so take that as an inspiration to provide a generic read_file() function usable by every part of kvmtool.
Signed-off-by: Andre Przywara <andre.przywara@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
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1664498d |
| 02-Nov-2011 |
Sasha Levin <levinsasha928@gmail.com> |
kvm tools: Add aio read write functions
This patch adds basic native vectored AIO functions.
These functions should be optimized to process multiple io requests at once.
Signed-off-by: Sasha Levin
kvm tools: Add aio read write functions
This patch adds basic native vectored AIO functions.
These functions should be optimized to process multiple io requests at once.
Signed-off-by: Sasha Levin <levinsasha928@gmail.com> Signed-off-by: Pekka Enberg <penberg@kernel.org>
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1547507f |
| 16-Apr-2011 |
Sasha Levin <levinsasha928@gmail.com> |
kvm tools: Add scatter-gather variants of IO functions
Added scatter-gather variants of [x,xp][read,write]() and [p]read_in_full().
Signed-off-by: Sasha Levin <levinsasha928@gmail.com> Signed-off-b
kvm tools: Add scatter-gather variants of IO functions
Added scatter-gather variants of [x,xp][read,write]() and [p]read_in_full().
Signed-off-by: Sasha Levin <levinsasha928@gmail.com> Signed-off-by: Pekka Enberg <penberg@kernel.org>
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6b7deb02 |
| 08-Apr-2011 |
Pekka Enberg <penberg@kernel.org> |
kvm tools: Use pread() and pwrite() in disk-image.c
This patch convert lseek() + read()/write() pairs with pread()/pwrite(). The performance of running the following command
dd if=/dev/vda of=/de
kvm tools: Use pread() and pwrite() in disk-image.c
This patch convert lseek() + read()/write() pairs with pread()/pwrite(). The performance of running the following command
dd if=/dev/vda of=/dev/null
in the guest does not show significant performance differences but should be a net win because of the reduction in system calls.
Signed-off-by: Pekka Enberg <penberg@kernel.org>
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c4d7847b |
| 31-Mar-2011 |
Pekka Enberg <penberg@kernel.org> |
kvm tools: Fix large disk images on 32-bit
Use read()/write() instead of mmap() for virtio block device emulation to support large disk images on 32-bit.
Reported-and-tested-by: Asias He <asias.hej
kvm tools: Fix large disk images on 32-bit
Use read()/write() instead of mmap() for virtio block device emulation to support large disk images on 32-bit.
Reported-and-tested-by: Asias He <asias.hejun@gmail.com> Tested-by: Cyrill Gorcunov <gorcunov@gmail.com> Signed-off-by: Pekka Enberg <penberg@kernel.org>
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