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- Log -----------------------------------------------------------------
commit 6e61b041d08cbb4cc7622fb1b514195d2141e729
Author: Samuel Thibault <[email protected]>
Date: Tue Jan 27 01:49:34 2026 +0100
typo
commit 6cf607fe4b1457160dded4652f8c086b75056784
Author: Milos Nikic <[email protected]>
Date: Fri Jan 23 14:37:01 2026 -0800
libstore, rumpdisk: Add write barrier support
This patch introduces a sync method to the store interface, allowing
users to request a physical write barrier from the underlying storage.
It implements this method for the device class by sending the new
DEV_FLUSH_CACHE status code, and adds the corresponding handler in
rumpdisk to trigger a physical cache flush via the NetBSD DIOCCACHESYNC
ioctl.
Note: This patch requires the corresponding gnumach patch
'device: Define DEV_FLUSH_CACHE status flavor' to build cleanly.
* libstore/store.h (struct store_class): Add `sync` member.
(store_sync): Add prototype.
* libstore/rdwr.c (store_sync): New function.
* libstore/device.c (dev_sync): New static function.
(store_device_class): Add `dev_sync` to the class vector.
* rumpdisk/block-rump.c (DIOCCACHESYNC): Define fallback if missing.
(rumpdisk_device_set_status): Handle DEV_FLUSH_CACHE flavor.
-----------------------------------------------------------------------
Summary of changes:
libstore/device.c | 12 +++++++++++-
libstore/rdwr.c | 9 +++++++++
libstore/store.h | 8 +++++++-
rumpdisk/block-rump.c | 24 ++++++++++++++++++++++++
4 files changed, 51 insertions(+), 2 deletions(-)
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