forked from SLFO-pool/xen
90 lines
3.1 KiB
Diff
90 lines
3.1 KiB
Diff
From: Olaf Hering <olaf@aepfle.de>
|
|
Date: Fri, 23 Oct 2020 14:58:53 +0200
|
|
Subject: libxc sr restore populate_pfns pfns
|
|
|
|
tools: restore: preallocate populate_pfns pfns array
|
|
|
|
Remove repeated allocation from migration loop. There will never be
|
|
more than MAX_BATCH_SIZE pages to process in an incoming batch.
|
|
Allocate the space once.
|
|
|
|
Use some prefix to avoid conflict with an array used in handle_page_data.
|
|
|
|
Signed-off-by: Olaf Hering <olaf@aepfle.de>
|
|
---
|
|
tools/libs/guest/xg_sr_common.h | 1 +
|
|
tools/libs/guest/xg_sr_restore.c | 14 +++++++-------
|
|
2 files changed, 8 insertions(+), 7 deletions(-)
|
|
|
|
--- a/tools/libs/guest/xg_sr_common.h
|
|
+++ b/tools/libs/guest/xg_sr_common.h
|
|
@@ -260,6 +260,7 @@ struct xc_sr_context
|
|
uint32_t *types;
|
|
xen_pfn_t *mfns;
|
|
int *map_errs;
|
|
+ xen_pfn_t *pp_pfns;
|
|
|
|
int send_back_fd;
|
|
unsigned long p2m_size;
|
|
--- a/tools/libs/guest/xg_sr_restore.c
|
|
+++ b/tools/libs/guest/xg_sr_restore.c
|
|
@@ -138,12 +138,11 @@ int populate_pfns(struct xc_sr_context *
|
|
const xen_pfn_t *original_pfns, const uint32_t *types)
|
|
{
|
|
xc_interface *xch = ctx->xch;
|
|
- xen_pfn_t *mfns = malloc(count * sizeof(*mfns)),
|
|
- *pfns = malloc(count * sizeof(*pfns));
|
|
+ xen_pfn_t *mfns = malloc(count * sizeof(*mfns));
|
|
unsigned int i, nr_pfns = 0;
|
|
int rc = -1;
|
|
|
|
- if ( !mfns || !pfns )
|
|
+ if ( !mfns )
|
|
{
|
|
ERROR("Failed to allocate %zu bytes for populating the physmap",
|
|
2 * count * sizeof(*mfns));
|
|
@@ -158,7 +157,7 @@ int populate_pfns(struct xc_sr_context *
|
|
rc = pfn_set_populated(ctx, original_pfns[i]);
|
|
if ( rc )
|
|
goto err;
|
|
- pfns[nr_pfns] = mfns[nr_pfns] = original_pfns[i];
|
|
+ ctx->restore.pp_pfns[nr_pfns] = mfns[nr_pfns] = original_pfns[i];
|
|
++nr_pfns;
|
|
}
|
|
}
|
|
@@ -182,14 +181,13 @@ int populate_pfns(struct xc_sr_context *
|
|
goto err;
|
|
}
|
|
|
|
- ctx->restore.ops.set_gfn(ctx, pfns[i], mfns[i]);
|
|
+ ctx->restore.ops.set_gfn(ctx, ctx->restore.pp_pfns[i], mfns[i]);
|
|
}
|
|
}
|
|
|
|
rc = 0;
|
|
|
|
err:
|
|
- free(pfns);
|
|
free(mfns);
|
|
|
|
return rc;
|
|
@@ -694,8 +692,9 @@ static int setup(struct xc_sr_context *c
|
|
ctx->restore.types = malloc(MAX_BATCH_SIZE * sizeof(*ctx->restore.types));
|
|
ctx->restore.mfns = malloc(MAX_BATCH_SIZE * sizeof(*ctx->restore.mfns));
|
|
ctx->restore.map_errs = malloc(MAX_BATCH_SIZE * sizeof(*ctx->restore.map_errs));
|
|
+ ctx->restore.pp_pfns = malloc(MAX_BATCH_SIZE * sizeof(*ctx->restore.pp_pfns));
|
|
if ( !ctx->restore.pfns || !ctx->restore.types || !ctx->restore.mfns ||
|
|
- !ctx->restore.map_errs )
|
|
+ !ctx->restore.map_errs || !ctx->restore.pp_pfns )
|
|
{
|
|
ERROR("Unable to allocate memory");
|
|
rc = -1;
|
|
@@ -732,6 +731,7 @@ static void cleanup(struct xc_sr_context
|
|
|
|
free(ctx->restore.buffered_records);
|
|
free(ctx->restore.populated_pfns);
|
|
+ free(ctx->restore.pp_pfns);
|
|
free(ctx->restore.map_errs);
|
|
free(ctx->restore.mfns);
|
|
free(ctx->restore.types);
|