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From: "Laszlo Ersek" <lersek@redhat.com>
To: devel@edk2.groups.io
Cc: "Ard Biesheuvel" <ard.biesheuvel@arm.com>,
	"Leif Lindholm" <leif@nuviainc.com>,
	"Philippe Mathieu-Daudé" <philmd@redhat.com>
Subject: [PATCH v2 03/10] ArmVirtPkg: raise PcdShellFileOperationSize to 128KB
Date: Wed, 13 Jan 2021 09:54:46 +0100	[thread overview]
Message-ID: <20210113085453.10168-4-lersek@redhat.com> (raw)
In-Reply-To: <20210113085453.10168-1-lersek@redhat.com>

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>
---

Notes:
    v2:
    - no changes
    - pick up Ard's A-b

 ArmVirtPkg/ArmVirtQemu.dsc       | 1 +
 ArmVirtPkg/ArmVirtQemuKernel.dsc | 1 +
 2 files changed, 2 insertions(+)

diff --git a/ArmVirtPkg/ArmVirtQemu.dsc b/ArmVirtPkg/ArmVirtQemu.dsc
index ef5d6dbeaddc..b8bc08d73921 100644
--- a/ArmVirtPkg/ArmVirtQemu.dsc
+++ b/ArmVirtPkg/ArmVirtQemu.dsc
@@ -204,6 +204,7 @@ [PcdsFixedAtBuild.common]
 !endif
 
   gEfiMdePkgTokenSpaceGuid.PcdReportStatusCodePropertyMask|3
+  gEfiShellPkgTokenSpaceGuid.PcdShellFileOperationSize|0x20000
 
 [PcdsFixedAtBuild.AARCH64]
   # Clearing BIT0 in this PCD prevents installing a 32-bit SMBIOS entry point,
diff --git a/ArmVirtPkg/ArmVirtQemuKernel.dsc b/ArmVirtPkg/ArmVirtQemuKernel.dsc
index f8f5f7f4b94b..2ef86f96688f 100644
--- a/ArmVirtPkg/ArmVirtQemuKernel.dsc
+++ b/ArmVirtPkg/ArmVirtQemuKernel.dsc
@@ -174,6 +174,7 @@ [PcdsFixedAtBuild.common]
 !endif
 
   gEfiMdePkgTokenSpaceGuid.PcdReportStatusCodePropertyMask|3
+  gEfiShellPkgTokenSpaceGuid.PcdShellFileOperationSize|0x20000
 
 [PcdsPatchableInModule.common]
   # we need to provide a resolution for this PCD that supports PcdSet64()
-- 
2.19.1.3.g30247aa5d201



  parent reply	other threads:[~2021-01-13  8:55 UTC|newest]

Thread overview: 31+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-13  8:54 [PATCH v2 00/10] multiple packages: shell usability improvements Laszlo Ersek
2021-01-13  8:54 ` [PATCH v2 01/10] ShellPkg/Comp: add file buffering Laszlo Ersek
2021-01-13 18:42   ` Philippe Mathieu-Daudé
2021-01-13  8:54 ` [PATCH v2 02/10] OvmfPkg: raise PcdShellFileOperationSize to 128KB Laszlo Ersek
2021-01-15  9:34   ` Philippe Mathieu-Daudé
2021-01-15 10:09     ` Laszlo Ersek
2021-01-15 15:58       ` Philippe Mathieu-Daudé
2021-01-15 18:22         ` Laszlo Ersek
2021-01-13  8:54 ` Laszlo Ersek [this message]
2021-01-15 15:59   ` [PATCH v2 03/10] ArmVirtPkg: " Philippe Mathieu-Daudé
2021-01-15 19:03     ` [edk2-devel] " Laszlo Ersek
2021-01-13  8:54 ` [PATCH v2 04/10] EmulatorPkg: add OrderedCollectionLib class resolution Laszlo Ersek
2021-01-13 13:20   ` Philippe Mathieu-Daudé
2021-01-18 16:48   ` [edk2-devel] " Laszlo Ersek
2021-01-19  7:55     ` 回复: " gaoliming
2021-01-13  8:54 ` [PATCH v2 05/10] UefiPayloadPkg: " Laszlo Ersek
2021-01-13 13:20   ` Philippe Mathieu-Daudé
2021-01-18 16:48   ` [edk2-devel] " Laszlo Ersek
2021-01-19  4:29     ` Guo Dong
2021-01-13  8:54 ` [PATCH v2 06/10] ShellPkg/ShellCommandLib: add ShellSortFileList() Laszlo Ersek
2021-01-13 13:19   ` Philippe Mathieu-Daudé
2021-01-13  8:54 ` [PATCH v2 07/10] ShellPkg/Ls: sort output by FileName in non-SFO mode Laszlo Ersek
2021-01-13 13:15   ` Philippe Mathieu-Daudé
2021-01-13  8:54 ` [PATCH v2 08/10] ShellPkg/ShellProtocol: sort files by FullName in RemoveDupInFileList() Laszlo Ersek
2021-01-13 13:14   ` Philippe Mathieu-Daudé
2021-01-14 14:19     ` Laszlo Ersek
2021-01-13  8:54 ` [PATCH v2 09/10] OvmfPkg: disable list length checks in NOOPT and DEBUG builds Laszlo Ersek
2021-01-15  9:30   ` Philippe Mathieu-Daudé
2021-01-13  8:54 ` [PATCH v2 10/10] ArmVirtPkg: " Laszlo Ersek
2021-01-15  9:31   ` Philippe Mathieu-Daudé
2021-01-19 18:39 ` [edk2-devel] [PATCH v2 00/10] multiple packages: shell usability improvements Laszlo Ersek

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