Remove cache=none

resolves: RHEL-135749

0062-output-Remove-useless-let-cmd.patch

@@ -0,0 +1,32 @@
+From 797dc287fbbd5f102540ca2a24cf99a6471fca0b Mon Sep 17 00:00:00 2001
+From: "Richard W.M. Jones" <rjones@redhat.com>
+Date: Mon, 12 May 2025 11:34:35 +0100
+Subject: [PATCH] output: Remove useless 'let cmd'
+
+Commit d50966c2a4 ("lib: Make Nbdkit mini-library handle mutable")
+made Nbdkit handles mutable, but didn't fix all instances where we
+still used the pure handle.  Fix it here.
+
+Fixes: commit d50966c2a480bda033f6e63bb797f86c13d576bd
+(cherry picked from commit 0be5d99ae71906d989cee3d48ada30fecd0f5888)
+---
+ output/output.ml | 6 ++----
+ 1 file changed, 2 insertions(+), 4 deletions(-)
+
+diff --git a/output/output.ml b/output/output.ml
+index 14288bdc..1bcb7c4f 100644
+--- a/output/output.ml
++++ b/output/output.ml
+@@ -102,10 +102,8 @@ let output_to_local_file ?(changeuid = fun f -> f ()) ?(compressed = false)
+     | "raw" ->
+        let cmd = Nbdkit.create "file" in
+        Nbdkit.add_arg cmd "file" filename;
+-       if Nbdkit.version () >= (1, 22, 0) then (
+-         let cmd = Nbdkit.add_arg cmd "cache" "none" in
+-         cmd
+-       );
++       if Nbdkit.version () >= (1, 22, 0) then
++         Nbdkit.add_arg cmd "cache" "none";
+        let _, pid = Nbdkit.run_unix socket cmd in
+        pid
+ 

0063-RHEL-output-output.ml-Remove-cache-none.patch

@@ -0,0 +1,35 @@
+From 6c4ca6464d8e955bdef9b5b6cdabdffe59931bc0 Mon Sep 17 00:00:00 2001
+From: "Richard W.M. Jones" <rjones@redhat.com>
+Date: Fri, 12 Dec 2025 16:18:15 +0000
+Subject: [PATCH] RHEL: output/output.ml: Remove cache=none
+
+Virt-v2v tries to reduce the amount of page cache used when writing
+out the disk image to the target storage. It does this by enabling the
+cache=none option in nbdkit-file-plugin.
+
+However, use of nbdkit-file-plugin cache=none option causes data
+corruption with Dell PowerMax 8000 storage (only).
+
+As this is only an advisory setting, remove it.  Use of the page cache
+can be limited instead using cgroupsv2 memory settings.
+
+Fixes: https://issues.redhat.com/browse/RHEL-135617
+(cherry picked from commit 30c03c7e308b063843a7848d15890871566bbbc0)
+(cherry picked from commit 24cd76732009fabd3070d1a1fcfee5cbfa5c229c)
+---
+ output/output.ml | 2 --
+ 1 file changed, 2 deletions(-)
+
+diff --git a/output/output.ml b/output/output.ml
+index 1bcb7c4f..cc4dee21 100644
+--- a/output/output.ml
++++ b/output/output.ml
+@@ -102,8 +102,6 @@ let output_to_local_file ?(changeuid = fun f -> f ()) ?(compressed = false)
+     | "raw" ->
+        let cmd = Nbdkit.create "file" in
+        Nbdkit.add_arg cmd "file" filename;
+-       if Nbdkit.version () >= (1, 22, 0) then
+-         Nbdkit.add_arg cmd "cache" "none";
+        let _, pid = Nbdkit.run_unix socket cmd in
+        pid
+ 

virt-v2v.spec

@@ -8,7 +8,7 @@
 Name:          virt-v2v
 Epoch:         1
 Version:       2.7.1
-Release:       18%{?dist}
+Release:       19%{?dist}
 Summary:       Convert a virtual machine to run on KVM
 
 License:       GPL-2.0-or-later AND LGPL-2.0-or-later
@@ -89,6 +89,8 @@ Patch0058:     0058-Ignore-ERROR_NO_MORE_ITEMS-status-from-PnPUtil.patch
 Patch0059:     0059-remove-timeout-before-installing-virtio-win-drivers.patch
 Patch0060:     0060-convert-windows-Fix-ESP-conversion-if-C-Windows-Temp.patch
 Patch0061:     0061-Update-common-submodule.patch
+Patch0062:     0062-output-Remove-useless-let-cmd.patch
+Patch0063:     0063-RHEL-output-output.ml-Remove-cache-none.patch
 
 %if !0%{?rhel}
 # libguestfs hasn't been built on i686 for a while since there is no
@@ -392,6 +394,10 @@ make -C tests TESTS=test-fedora-luks-on-lvm-conversion.sh check
 
 
 %changelog
+* Mon Dec 15 2025 Richard W.M. Jones <rjones@redhat.com> - 1:2.7.1-19
+- Remove cache=none
+  resolves: RHEL-135749
+
 * Mon Nov 17 2025 Richard W.M. Jones <rjones@redhat.com> - 1:2.7.1-18
 - Fix pnputil driver store after conversion
   resolves: RHEL-128772