ext4: add FALLOC_FL_WRITE_ZEROES support

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Add support for FALLOC_FL_WRITE_ZEROES if the underlying device enable
the unmap write zeroes operation. This first allocates blocks as
unwritten, then issues a zero command outside of the running journal
handle, and finally converts them to a written state.

Signed-off-by: Zhang Yi <yi.zhang@huawei.com>
Link: https://lore.kernel.org/20250619111806.3546162-10-yi.zhang@huaweicloud.com
Reviewed-by: "Martin K. Petersen" <martin.petersen@oracle.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>

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Zhang Yi 2025-06-19 19:18:06 +08:00 • committed by Christian Brauner

parent 912b6038fe

commit f4265b8d32

2 changed files with 57 additions and 12 deletions

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66

fs/ext4/extents.c

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3

include/trace/events/ext4.h

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