diff options
| author | David Disseldorp <ddiss@samba.org> | 2014-07-10 00:18:10 +0200 |
|---|---|---|
| committer | Andreas Schneider <asn@cryptomilk.org> | 2014-08-08 14:10:38 +0200 |
| commit | 1e83435eac2cef03fccb4cf69ef5e0bfbd710410 (patch) | |
| tree | e5b6e0d66d31cd223f1dda28d768b7c12a65c1be /lib/zlib/examples/zpipe.c | |
| parent | 9c5470be1e69af78c0c681fbb9a2d113039556f3 (diff) | |
| download | samba-1e83435eac2cef03fccb4cf69ef5e0bfbd710410.tar.gz samba-1e83435eac2cef03fccb4cf69ef5e0bfbd710410.tar.xz samba-1e83435eac2cef03fccb4cf69ef5e0bfbd710410.zip | |
printing: traverse_read the printer list for share updates
The printcap update procedure involves the background printer process
obtaining the printcap information from the printing backend, writing
this to printer_list.tdb, and then notifying all smbd processes of the
new list. The processes then all attempt to simultaneously traverse
printer_list.tdb, in order to update their local share lists.
With a large number of printers, and a large number of per-client smbd
processes, this traversal results in significant lock contention, mostly
due to the fact that the traversal is unnecessarily done with an
exclusive (write) lock on the printer_list.tdb database.
This commit changes the share update code path to perform a read-only
traversal.
Bug: https://bugzilla.samba.org/show_bug.cgi?id=10652
Reported-by: Alex K <korobkin+samba@gmail.com>
Reported-by: Franz Pförtsch <franz.pfoertsch@brose.com>
Signed-off-by: David Disseldorp <ddiss@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
Diffstat (limited to 'lib/zlib/examples/zpipe.c')
0 files changed, 0 insertions, 0 deletions