fc5a1dabcb
This is an automated DistroBaker update from upstream sources. If you do not know what this is about or would like to opt out, contact the OSCI team. Source: https://src.fedoraproject.org/rpms/libnbd.git#8c37651ac69f29390463002bd07996f1f4b2a553
72 lines
2.5 KiB
Diff
72 lines
2.5 KiB
Diff
From 4e456ff6363580177ceffdad79b8fc1e8c7f35eb Mon Sep 17 00:00:00 2001
|
|
From: "Richard W.M. Jones" <rjones@redhat.com>
|
|
Date: Wed, 3 Mar 2021 10:12:31 +0000
|
|
Subject: [PATCH 3/5] Revert "copy: file-ops.c: Remove unneeded check"
|
|
|
|
This reverts commit 0f6e4f38bc440fc52c20a3a448ef031f806ec5e2.
|
|
|
|
This fails on ppc64le only with:
|
|
|
|
lt-nbdcopy: file-ops.c:136: page_was_cached: Assertion `page < rwf->cached_pages.size' failed.
|
|
|
|
Coincidentally this is the only architecture on Fedora that uses a 64K
|
|
page size, although I don't know if that is connected. I was not able
|
|
to make this fail on x86.
|
|
---
|
|
copy/file-ops.c | 21 ++++++++++-----------
|
|
1 file changed, 10 insertions(+), 11 deletions(-)
|
|
|
|
diff --git a/copy/file-ops.c b/copy/file-ops.c
|
|
index 47ec768..ea725a4 100644
|
|
--- a/copy/file-ops.c
|
|
+++ b/copy/file-ops.c
|
|
@@ -102,7 +102,7 @@ page_size_init (void)
|
|
/* Load the page cache map for a particular file into
|
|
* rwf->cached_pages. Only used when reading files. This doesn't
|
|
* fail: if a system call fails then rwf->cached_pages.size will be
|
|
- * zero which is handled in page_cache_evict.
|
|
+ * zero which is handled in page_was_cached.
|
|
*/
|
|
static inline void
|
|
page_cache_map (struct rw_file *rwf)
|
|
@@ -126,16 +126,19 @@ page_cache_map (struct rw_file *rwf)
|
|
munmap (ptr, rwf->rw.size);
|
|
}
|
|
|
|
-/* Test if a single page of the file was cached before nbdcopy ran.
|
|
- * Valid only if we mapped the cached pages.
|
|
- */
|
|
+/* Test if a single page of the file was cached before nbdcopy ran. */
|
|
static inline bool
|
|
page_was_cached (struct rw_file *rwf, uint64_t offset)
|
|
{
|
|
uint64_t page = offset / page_size;
|
|
- assert (page < rwf->cached_pages.size);
|
|
-
|
|
- return (rwf->cached_pages.ptr[page] & 1) != 0;
|
|
+ if (page < rwf->cached_pages.size)
|
|
+ return (rwf->cached_pages.ptr[page] & 1) != 0;
|
|
+ else
|
|
+ /* This path is taken if we didn't manage to map the input file
|
|
+ * for any reason. In this case assume that pages were mapped so
|
|
+ * we will not evict them: essentially fall back to doing nothing.
|
|
+ */
|
|
+ return true;
|
|
}
|
|
|
|
/* Evict file contents from the page cache if they were not present in
|
|
@@ -147,10 +150,6 @@ page_cache_evict (struct rw_file *rwf, uint64_t orig_offset, size_t orig_len)
|
|
uint64_t offset, n;
|
|
size_t len;
|
|
|
|
- /* If we didn't manage to map the input file for any reason, assume
|
|
- * that pages were mapped so we will not evict them: essentially fall
|
|
- * back to doing nothing.
|
|
- */
|
|
if (rwf->cached_pages.size == 0) return;
|
|
|
|
/* Only bother with whole pages. */
|
|
--
|
|
2.29.0.rc2
|
|
|