Date: Sun, 26 Aug 2018 18:52:43 +0000 From: bugzilla-noreply@freebsd.org To: fs@FreeBSD.org Subject: [Bug 223786] Remounting a UFS filesystem read-only takes very long time Message-ID: <bug-223786-3630-w3WN0yTkfN@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-223786-3630@https.bugs.freebsd.org/bugzilla/> References: <bug-223786-3630@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D223786 --- Comment #7 from Mikhail Teterin <mi@FreeBSD.org> --- (In reply to Kirk McKusick from comment #3) > include the -o noatime option No obvious difference: root@narawntapu:/etc/mail (1024) mount -orw,noatime / root@narawntapu:/etc/mail (1025) touch q root@narawntapu:/etc/mail (1026) rm q root@narawntapu:/etc/mail (1027) mount -oro -u / load: 0.71 cmd: mount 27675 [biowr] 7.92r 0.00u 0.72s 4% 2224k load: 0.52 cmd: mount 27675 [biowr] 54.83r 0.00u 2.64s 2% 2224k load: 0.47 cmd: mount 27675 [biowr] 68.05r 0.00u 3.12s 2% 2224k load: 0.58 cmd: mount 27675 [biowr] 121.83r 0.00u 5.08s 3% 2224k load: 0.36 cmd: mount 27675 [biowr] 254.59r 0.00u 9.97s 2% 2224k ... > time -l root@narawntapu:/etc/mail (1034) /usr/bin/time -l mount -oro / 330,18 real 0,00 user 13,01 sys 2212 maximum resident set size 22 average shared memory size 7 average unshared data size 121 average unshared stack size 112 page reclaims 0 page faults 0 swaps 0 block input operations 344120 block output operations 0 messages sent 0 messages received 0 signals received 344178 voluntary context switches 1014 involuntary context switches The entire FS is: Filesystem 1M-blocks Used Avail Capacity Mounted on /dev/ada0s1a 22808 16268 4715 78% / *what* 344120 "block output operations"?! --=20 You are receiving this mail because: You are the assignee for the bug.=
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