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migration/multifd: Allow clearing of the file_bmap from multifd

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We currently only need to clear the mapped-ram file bitmap from the
migration thread during save_zero_page.

We're about to add support for zero page detection on the multifd
thread, so allow ramblock_set_file_bmap_atomic() to also clear the
bits.

Signed-off-by: Fabiano Rosas <farosas@suse.de>
Link: https://lore.kernel.org/r/20240311180015.3359271-3-hao.xiang@linux.dev
Signed-off-by: Peter Xu <peterx@redhat.com>
This commit is contained in:
Fabiano Rosas
2024-03-11 18:00:10 +00:00
committed by Peter Xu
parent 44fe138edc
commit c3cdf3fb18
3 changed files with 9 additions and 4 deletions
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8
migration/ram.c
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@ -3149,9 +3149,13 @@ static void ram_save_file_bmap(QEMUFile *f)
}
}
void ramblock_set_file_bmap_atomic(RAMBlock *block, ram_addr_t offset)
void ramblock_set_file_bmap_atomic(RAMBlock *block, ram_addr_t offset, bool set)
{
set_bit_atomic(offset >> TARGET_PAGE_BITS, block->file_bmap);
if (set) {
set_bit_atomic(offset >> TARGET_PAGE_BITS, block->file_bmap);
} else {
clear_bit_atomic(offset >> TARGET_PAGE_BITS, block->file_bmap);
}
}
/**