search for: 8bb9a2d

...user 0m0.193s sys 0m0.702s Note: the image is sparse, but nbdkit creates a fully allocated image. This may be a bug in nbdkit or qemu-img. --- plugins/file/file.c | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) diff --git a/plugins/file/file.c b/plugins/file/file.c index 8bb9a2d..aa05492 100644 --- a/plugins/file/file.c +++ b/plugins/file/file.c @@ -121,6 +121,7 @@ struct handle { int fd; bool can_punch_hole; bool can_zero_range; + bool can_fallocate; }; /* Create the per-connection handle. */ @@ -161,6 +162,8 @@ file_open (int readonly) h->can_zero_ran...

...all back to manual writing - trim changed to: 1. If we can punch hole, try PUNCH_HOLE 2. Succeed --- plugins/file/file.c | 96 ++++++++++++++++++++++++++++----------------- 1 file changed, 59 insertions(+), 37 deletions(-) diff --git a/plugins/file/file.c b/plugins/file/file.c index 3bb4d17..8bb9a2d 100644 --- a/plugins/file/file.c +++ b/plugins/file/file.c @@ -33,6 +33,7 @@ #include <config.h> +#include <stdbool.h> #include <stdio.h> #include <stdlib.h> #include <string.h> @@ -118,6 +119,8 @@ file_config_complete (void) /* The per-connection handle. */...

This is the second version to support efficient zero for block devices on older kernels (e.g. RHEL 7.5), and file systems that do not support yet FALLOC_FS_ZERO_RANGE (e.g. NFS 4.2). Changes since v1: - Split to smaller patches - Skip linux only includes on other systems - Skip code using BLKZEROOUT if the macro is not defined - Try BLKZEROOUT only if the offset and count are aligned to device