From mboxrd@z Thu Jan 1 00:00:00 1970 From: zkabelac@sourceware.org Date: 22 Oct 2011 16:52:01 -0000 Subject: LVM2 ./WHATS_NEW lib/log/log.c Message-ID: <20111022165201.10791.qmail@sourceware.org> List-Id: To: lvm-devel@redhat.com MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit CVSROOT: /cvs/lvm2 Module name: LVM2 Changes by: zkabelac at sourceware.org 2011-10-22 16:52:01 Modified files: . : WHATS_NEW lib/log : log.c Log message: Reduce stack size usage in print_log As the buf2[] and locn[] can't be used at the same time, safe 1 page from stack memory. Patches: http://sourceware.org/cgi-bin/cvsweb.cgi/LVM2/WHATS_NEW.diff?cvsroot=lvm2&r1=1.2167&r2=1.2168 http://sourceware.org/cgi-bin/cvsweb.cgi/LVM2/lib/log/log.c.diff?cvsroot=lvm2&r1=1.65&r2=1.66 --- LVM2/WHATS_NEW 2011/10/22 16:42:10 1.2167 +++ LVM2/WHATS_NEW 2011/10/22 16:52:00 1.2168 @@ -1,5 +1,6 @@ Version 2.02.89 - ================================== + Remove extra 4kB buffer allocated on stack in print_log(). Make move_lv_segment non-static function and use dm_list function. Pass exclusive LV locks to all nodes in the cluster. Improve lvcreate man documentation of the chunksize option. --- LVM2/lib/log/log.c 2011/08/11 19:21:42 1.65 +++ LVM2/lib/log/log.c 2011/10/22 16:52:00 1.66 @@ -185,7 +185,7 @@ const char *format, ...) { va_list ap; - char buf[1024], buf2[4096], locn[4096]; + char buf[1024], locn[4096]; int bufused, n; const char *message; const char *trformat; /* Translated format string */ @@ -221,7 +221,7 @@ (_store_errmsg && (level <= _LOG_ERR)) || log_once) { va_start(ap, format); - n = vsnprintf(buf2, sizeof(buf2) - 1, trformat, ap); + n = vsnprintf(locn, sizeof(locn) - 1, trformat, ap); va_end(ap); if (n < 0) { @@ -230,8 +230,8 @@ goto log_it; } - buf2[sizeof(buf2) - 1] = '\0'; - message = &buf2[0]; + locn[sizeof(locn) - 1] = '\0'; + message = &locn[0]; } /* FIXME Avoid pointless use of message buffer when it'll never be read! */