Robert Evans 102b468b5e Fix corruption caused by mmap flushing problems ... 1) Make mmap flushes synchronous. Linux may skip flushing dirty pages already in writeback unless data-integrity sync is requested. 2) Change zfs_putpage to use TXG_WAIT. Otherwise dirty pages may be skipped due to DMU pushing back on TX assign. 3) Add missing mmap flush when doing block cloning. 4) While here, pass errors from putpage to writepage/writepages. This change fixes corruption edge cases, but unfortunately adds synchronous ZIL flushes for dirty mmap pages to llseek and bclone operations. It may be possible to avoid these sync writes later but would need more tricky refactoring of the writeback code. Reviewed-by: Alexander Motin <mav@FreeBSD.org> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Robert Evans <evansr@google.com> Closes #15933 Closes #16019		2024-03-25 14:56:49 -07:00
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freebsd	BRT: Fix FICLONE/FICLONERANGE shortened copy	2024-02-05 16:44:45 -08:00
linux	Fix corruption caused by mmap flushing problems	2024-03-25 14:56:49 -07:00