On Tue, 2004-12-28 at 10:05 -0800, Doug Luce wrote:> >From today's maillog:
>
> maillog:Dec 28 09:49:10 aurora dovecot: IMAP(doug): msync() failed with
index file /home/doug/Maildir/dovecot.index: Invalid argument
>
> Can anyone slip me some advice on how to properly go about debugging
> this problem? Is there a way to check the .index file? Can anyone
> make an educated guess as to what section of code is the likely
> culprit?
There are only two msync() calls in the code. Try what it says with this
patch:
Index: src/lib-index/mail-index-sync-update.c
==================================================================RCS file:
/var/lib/cvs/dovecot/src/lib-index/mail-index-sync-update.c,v
retrieving revision 1.78
diff -u -r1.78 mail-index-sync-update.c
--- src/lib-index/mail-index-sync-update.c 26 Dec 2004 09:12:40 -0000 1.78
+++ src/lib-index/mail-index-sync-update.c 6 Jan 2005 19:23:55 -0000
@@ -675,6 +675,14 @@
PTR_OFFSET(map->hdr_base, sizeof(map->hdr)),
map->hdr.header_size - sizeof(map->hdr));
if (msync(map->mmap_base, map->mmap_used_size, MS_SYNC) < 0) {
+ void *p;
+ i_error("msync(%p, %"PRIuSIZE_T") failed, checking..",
+ map->mmap_base, map->mmap_used_size);
+ p = i_malloc(map->mmap_used_size);
+ memcpy(p, map->mmap_base, map->mmap_used_size);
+ i_free(p);
+ i_error("we didn't crash, the address range is ok.");
+
mail_index_set_syscall_error(index, "msync()");
ret = -1;
}
Index: src/lib-index/mail-index.c
==================================================================RCS file:
/var/lib/cvs/dovecot/src/lib-index/mail-index.c,v
retrieving revision 1.184
diff -u -r1.184 mail-index.c
--- src/lib-index/mail-index.c 26 Dec 2004 09:12:40 -0000 1.184
+++ src/lib-index/mail-index.c 6 Jan 2005 19:23:56 -0000
@@ -1057,8 +1057,12 @@
if (!MAIL_INDEX_MAP_IS_IN_MEMORY(index->map)) {
memcpy(index->map->mmap_base, hdr, hdr_size);
- if (msync(index->map->mmap_base, hdr_size, MS_SYNC) < 0)
+ if (msync(index->map->mmap_base, hdr_size, MS_SYNC) < 0) {
+ i_error("header: msync(%p, %"PRIuSIZE_T") failed,
mmap_size=%"PRIuSIZE_T,
+ index->map->mmap_base, hdr_size,
+ index->map->mmap_size);
return mail_index_set_syscall_error(index, "msync()");
+ }
} else {
if (pwrite_full(index->fd, hdr, hdr_size, 0) < 0) {
mail_index_set_syscall_error(index, "pwrite_full()");
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