I've gotten fairly far into compiling and running dovecot on HPUX. The problem I'm currently having is that the index seems to be mmap'ed at twice after login. The 576 byte mmap is the index file:
root@hp46t243 # grep mmap64 /tmp/dovecot.tusc [imap ][1707] mmap64(NULL, 576, PROT_READ|PROT_WRITE, MAP_SHARED, 7, 0) = 0xc166c000 [imap ][1707] mmap64(NULL, 18432, PROT_READ, MAP_SHARED, 8, 0) ........ = 0xc166d000 [imap ][1707] mmap64(NULL, 24, PROT_READ, MAP_SHARED, 9, 0) ........... = 0xc1672000 [imap ][1707] mmap64(NULL, 576, PROT_READ|PROT_WRITE, MAP_SHARED, 7, 0) ERR#12 ENOMEM [imap ][1717] mmap64(NULL, 576, PROT_READ|PROT_WRITE, MAP_SHARED, 7, 0) = 0xc166c000 [imap ][1717] mmap64(NULL, 18432, PROT_READ, MAP_SHARED, 9, 0) ........ = 0xc166d000 [imap ][1717] mmap64(NULL, 24, PROT_READ, MAP_SHARED, 8, 0) ........... = 0xc1672000 [imap ][1717] mmap64(NULL, 576, PROT_READ|PROT_WRITE, MAP_SHARED, 7, 0) ERR#12 ENOMEM [imap ][1897] mmap64(NULL, 576, PROT_READ|PROT_WRITE, MAP_SHARED, 7, 0) = 0xc166c000 [imap ][1897] mmap64(NULL, 18432, PROT_READ, MAP_SHARED, 9, 0) ........ = 0xc166d000 [imap ][1897] mmap64(NULL, 24, PROT_READ, MAP_SHARED, 8, 0) ........... = 0xc1672000 [imap ][1897] mmap64(NULL, 576, PROT_READ|PROT_WRITE, MAP_SHARED, 7, 0) ERR#12 ENOMEM [imap ][2042] mmap64(NULL, 576, PROT_READ|PROT_WRITE, MAP_SHARED, 7, 0) = 0xc166c000 [imap ][2042] mmap64(NULL, 18432, PROT_READ, MAP_SHARED, 9, 0) ........ = 0xc166d000 [imap ][2042] mmap64(NULL, 24, PROT_READ, MAP_SHARED, 8, 0) ........... = 0xc1672000 [imap ][2042] mmap64(NULL, 576, PROT_READ|PROT_WRITE, MAP_SHARED, 7, 0) ERR#12 ENOMEM [imap ][2178] mmap64(NULL, 576, PROT_READ|PROT_WRITE, MAP_SHARED, 7, 0) = 0xc166c000 [imap ][2178] mmap64(NULL, 18432, PROT_READ, MAP_SHARED, 9, 0) ........ = 0xc166d000 [imap ][2178] mmap64(NULL, 24, PROT_READ, MAP_SHARED, 8, 0) ........... = 0xc1672000 [imap ][2178] mmap64(NULL, 576, PROT_READ|PROT_WRITE, MAP_SHARED, 7, 0) ERR#12 ENOMEM [imap ][2318] mmap64(NULL, 576, PROT_READ|PROT_WRITE, MAP_SHARED, 7, 0) = 0xc166c000 [imap ][2318] mmap64(NULL, 18432, PROT_READ, MAP_SHARED, 9, 0) ........ = 0xc166d000 [imap ][2318] mmap64(NULL, 24, PROT_READ, MAP_SHARED, 8, 0) ........... = 0xc1672000 [imap ][2318] mmap64(NULL, 576, PROT_READ|PROT_WRITE, MAP_SHARED, 7, 0) ERR#12 ENOMEM root@hp46t243 #
I think multiple mmap's of the same file are verboten --
+ In most cases, two separate calls to mmap() cannot map
overlapping ranges in a file. The virtual address range
reserved for a file range is determined at the time of the
initial mapping of the file range into a process address
space. The system allocates only the virtual address range
necessary to represent the initial mapping. As long as the
initial mapping exists, subsequent attempts to map a different
file range that includes any portion of the initial range may
fail with an ENOMEM error if an extended contiguous address
range that preserves the mappings of the initial range cannot
be allocated.So, I was trying to look at why the index file is being mapped twice,
and why the addr isn't saved and reused. I was thinking of adding it to
one of the index structures and skipping the mmap if the addr != 0.
I've been poking around for a couple of hours today and am going to call
it a day, but I thought I'd ping the list to see if there was something
obvious I was missing.
Rich