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From e74b927853e84b44f8047718020593939ad125ec Mon Sep 17 00:00:00 2001
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From: Juan Quintela <quintela@redhat.com>
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Date: Wed, 18 May 2022 02:52:23 -0300
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Subject: [PATCH 09/34] multifd: Make zlib compression method not use iovs
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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RH-Author: Leonardo Brás <leobras@redhat.com>
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RH-MergeRequest: 185: MSG_ZEROCOPY + Multifd @ rhel8.6
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RH-Commit: [9/34] 37d70e2163ed982e2d8343c4ec1061fc59677688
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RH-Bugzilla: 2117252
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RH-Acked-by: quintela1 <quintela@redhat.com>
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RH-Acked-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
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RH-Acked-by: Peter Xu <peterx@redhat.com>
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Signed-off-by: Juan Quintela <quintela@redhat.com>
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Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
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(cherry picked from commit a5ed22948873b50fcf1415d1ce15c71d61a9388d)
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Signed-off-by: Leonardo Bras <leobras@redhat.com>
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---
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migration/multifd-zlib.c | 17 +++++++++--------
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1 file changed, 9 insertions(+), 8 deletions(-)
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diff --git a/migration/multifd-zlib.c b/migration/multifd-zlib.c
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index 330fc021c5..a1950a4588 100644
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--- a/migration/multifd-zlib.c
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+++ b/migration/multifd-zlib.c
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@@ -13,6 +13,7 @@
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#include "qemu/osdep.h"
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#include <zlib.h>
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#include "qemu/rcu.h"
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+#include "exec/ramblock.h"
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#include "exec/target_page.h"
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#include "qapi/error.h"
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#include "migration.h"
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@@ -100,8 +101,8 @@ static void zlib_send_cleanup(MultiFDSendParams *p, Error **errp)
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*/
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static int zlib_send_prepare(MultiFDSendParams *p, Error **errp)
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{
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- struct iovec *iov = p->pages->iov;
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struct zlib_data *z = p->data;
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+ size_t page_size = qemu_target_page_size();
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z_stream *zs = &z->zs;
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uint32_t out_size = 0;
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int ret;
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@@ -115,8 +116,8 @@ static int zlib_send_prepare(MultiFDSendParams *p, Error **errp)
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flush = Z_SYNC_FLUSH;
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}
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- zs->avail_in = iov[i].iov_len;
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- zs->next_in = iov[i].iov_base;
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+ zs->avail_in = page_size;
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+ zs->next_in = p->pages->block->host + p->pages->offset[i];
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zs->avail_out = available;
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zs->next_out = z->zbuff + out_size;
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@@ -240,6 +241,7 @@ static void zlib_recv_cleanup(MultiFDRecvParams *p)
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static int zlib_recv_pages(MultiFDRecvParams *p, Error **errp)
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{
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struct zlib_data *z = p->data;
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+ size_t page_size = qemu_target_page_size();
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z_stream *zs = &z->zs;
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uint32_t in_size = p->next_packet_size;
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/* we measure the change of total_out */
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@@ -264,7 +266,6 @@ static int zlib_recv_pages(MultiFDRecvParams *p, Error **errp)
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zs->next_in = z->zbuff;
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for (i = 0; i < p->pages->num; i++) {
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- struct iovec *iov = &p->pages->iov[i];
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int flush = Z_NO_FLUSH;
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unsigned long start = zs->total_out;
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@@ -272,8 +273,8 @@ static int zlib_recv_pages(MultiFDRecvParams *p, Error **errp)
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flush = Z_SYNC_FLUSH;
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}
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- zs->avail_out = iov->iov_len;
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- zs->next_out = iov->iov_base;
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+ zs->avail_out = page_size;
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+ zs->next_out = p->pages->block->host + p->pages->offset[i];
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/*
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* Welcome to inflate semantics
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@@ -286,8 +287,8 @@ static int zlib_recv_pages(MultiFDRecvParams *p, Error **errp)
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do {
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ret = inflate(zs, flush);
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} while (ret == Z_OK && zs->avail_in
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- && (zs->total_out - start) < iov->iov_len);
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- if (ret == Z_OK && (zs->total_out - start) < iov->iov_len) {
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+ && (zs->total_out - start) < page_size);
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+ if (ret == Z_OK && (zs->total_out - start) < page_size) {
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error_setg(errp, "multifd %d: inflate generated too few output",
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p->id);
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return -1;
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--
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2.35.3
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