Anton Ivanov 54ebe4060f um: Use fdatasync() when mapping the UBD FSYNC command ...

We do not need to update the metadata (atime, mtime, etc)
on the UBD file and/or the COW file until UML exits.

UBD image mtime is checked in UML only when opening
the files. After that they are locked and used
exclusively by a single UML instance, so there is
no point wasting resources on updating metadata on
every sync. We can sync data only. The host will
always update mtime if a file has been modified upon
closing it.

Signed-off-by: Anton Ivanov <anton.ivanov@cambridgegreys.com>
Signed-off-by: Richard Weinberger <richard@nod.at>

2020-06-02 22:37:55 +02:00

..

drivers

um: Add SPDX headers for files in arch/um/os-Linux

2019-09-15 21:37:17 +02:00

skas

um: Add SPDX headers for files in arch/um/os-Linux

2019-09-15 21:37:17 +02:00

elf_aux.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

execvp.c

um: Use os_warn to print out pre-boot warning/error messages

2017-07-05 23:18:25 +02:00

file.c

um: Use fdatasync() when mapping the UBD FSYNC command

2020-06-02 22:37:55 +02:00

helper.c

um: Add SPDX headers for files in arch/um/os-Linux

2019-09-15 21:37:17 +02:00

irq.c

um: Add SPDX headers for files in arch/um/os-Linux

2019-09-15 21:37:17 +02:00

main.c

um: Don't trace irqflags during shutdown

2019-11-25 22:42:57 +01:00

Makefile

um: Add SPDX headers for files in arch/um/os-Linux

2019-09-15 21:37:17 +02:00

mem.c

um: Add SPDX headers for files in arch/um/os-Linux

2019-09-15 21:37:17 +02:00

process.c

um: Add SPDX headers for files in arch/um/os-Linux

2019-09-15 21:37:17 +02:00

registers.c

um: Add SPDX headers for files in arch/um/os-Linux

2019-09-15 21:37:17 +02:00

sigio.c

um: Add SPDX headers for files in arch/um/os-Linux

2019-09-15 21:37:17 +02:00

signal.c

um: Add SPDX headers for files in arch/um/os-Linux

2019-09-15 21:37:17 +02:00

start_up.c

um: Add SPDX headers for files in arch/um/os-Linux

2019-09-15 21:37:17 +02:00

time.c

um: Move timer-internal.h to non-shared

2020-03-29 23:28:43 +02:00

tty.c

um: Add SPDX headers for files in arch/um/os-Linux

2019-09-15 21:37:17 +02:00

umid.c

um: Fix len of file in create_pid_file

2020-03-29 23:20:07 +02:00

user_syms.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

util.c

um: Add SPDX headers for files in arch/um/os-Linux

2019-09-15 21:37:17 +02:00