[Devel] [PATCH RHEL9 COMMIT] fs/fuse: kio: WRITE_HOLE/ZERO should not be chunked

[Konstantin Khorenko]

The commit is pushed to "branch-rh9-5.14.0-427.37.1.vz9.78.x-ovz" and will appear at git at bitbucket.org:openvz/vzkernel.git
after rh9-5.14.0-427.37.1.vz9.78.1
------>
commit 2b184a76c68b0b0d558cde0b4c56bd7c99f50f13
Author: Alexey Kuznetsov <kuznet at virtuozzo.com>
Date:   Fri Oct 25 22:23:01 2024 +0800

    fs/fuse: kio: WRITE_HOLE/ZERO should not be chunked
    
    No actual impact on performance as all the chunks are sent
    in parallel, yet it is huge resource overconsumption.
    
    Affects: #VSTOR-94452
    https://virtuozzo.atlassian.net/browse/VSTOR-94452
    
    Signed-off-by: Alexey Kuznetsov <kuznet at virtuozzo.com>
    Feature: vStorage
---
 fs/fuse/kio/pcs/pcs_map.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/fuse/kio/pcs/pcs_map.c b/fs/fuse/kio/pcs/pcs_map.c
index a40cc6830a83..f84cd30ed0d6 100644
--- a/fs/fuse/kio/pcs/pcs_map.c
+++ b/fs/fuse/kio/pcs/pcs_map.c
@@ -2243,7 +2243,7 @@ static int pcs_cslist_submit_write(struct pcs_int_request *ireq, struct pcs_cs_l
 		struct pcs_int_request * sreq = ireq;
 		unsigned int weight;
 
-		if (ireq->iochunk.size > iochunk) {
+		if (ireq->iochunk.size > iochunk && ireq->iochunk.cmd == PCS_REQ_T_WRITE) {
 			sreq = pcs_ireq_split(ireq, iochunk, 0);
 
 			if (sreq == NULL) {