diff options
| author | Laszlo Ersek <lersek@redhat.com> | 2021-01-13 09:54:46 +0100 |
|---|---|---|
| committer | mergify[bot] <37929162+mergify[bot]@users.noreply.github.com> | 2021-01-19 18:23:28 +0000 |
| commit | a0b352e18bde9fd17a249840888fc11c3af9917b (patch) | |
| tree | 33ffd6b9cd693934545f582de3e472f2297754cb /ArmVirtPkg/ArmVirtQemuKernel.dsc | |
| parent | 2912341cd924ebc32889879912aa9588dae4d209 (diff) | |
| download | edk2-a0b352e18bde9fd17a249840888fc11c3af9917b.tar.gz | |
ArmVirtPkg: raise PcdShellFileOperationSize to 128KB
Some UEFI shell commands read and write files in chunks. The chunk size is
given by "PcdShellFileOperationSize", whose default in
"ShellPkg/ShellPkg.dec" is 4KB (0x1000).
The virtio-fs daemon of QEMU advertizes a 128KB maximum buffer size by
default, for the FUSE_WRITE operation.
By raising PcdShellFileOperationSize 32-fold, the number of FUSE write
requests shrinks proportionately, when writing large files. And when a
Virtio Filesystem is not used, a 128KB chunk size is still not
particularly wasteful.
Cc: Ard Biesheuvel <ard.biesheuvel@arm.com>
Cc: Leif Lindholm <leif@nuviainc.com>
Cc: Philippe Mathieu-Daudé <philmd@redhat.com>
Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=3125
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Acked-by: Ard Biesheuvel <ard.biesheuvel@arm.com>
Message-Id: <20210113085453.10168-4-lersek@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Diffstat (limited to 'ArmVirtPkg/ArmVirtQemuKernel.dsc')
| -rw-r--r-- | ArmVirtPkg/ArmVirtQemuKernel.dsc | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/ArmVirtPkg/ArmVirtQemuKernel.dsc b/ArmVirtPkg/ArmVirtQemuKernel.dsc index f8f5f7f4b9..2ef86f9668 100644 --- a/ArmVirtPkg/ArmVirtQemuKernel.dsc +++ b/ArmVirtPkg/ArmVirtQemuKernel.dsc @@ -174,6 +174,7 @@ !endif
gEfiMdePkgTokenSpaceGuid.PcdReportStatusCodePropertyMask|3
+ gEfiShellPkgTokenSpaceGuid.PcdShellFileOperationSize|0x20000
[PcdsPatchableInModule.common]
# we need to provide a resolution for this PCD that supports PcdSet64()
|