Date: Sat, 24 Oct 2020 22:53:33 +0300 From: Konstantin Belousov <kostikbel@gmail.com> To: Christos Chatzaras <chris@cretaforce.gr> Cc: freebsd-fs@freebsd.org Subject: Re: PHP-FPM processes hang in UFS-state Message-ID: <20201024195333.GG2643@kib.kiev.ua> In-Reply-To: <36F3D7E6-A48C-4066-BF8C-10EEBA4E7BB2@cretaforce.gr> References: <988121C5-4545-4720-8D07-814E9D02DDCA@cretaforce.gr> <20201024170620.GC2643@kib.kiev.ua> <74B608B9-B36E-41D2-B298-4F829A727403@cretaforce.gr> <20201024181319.GE2643@kib.kiev.ua> <1B608C97-944A-4FE6-A867-42ECFB5A1E8C@cretaforce.gr> <20201024191612.GF2643@kib.kiev.ua> <36F3D7E6-A48C-4066-BF8C-10EEBA4E7BB2@cretaforce.gr>
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On Sat, Oct 24, 2020 at 10:25:33PM +0300, Christos Chatzaras wrote: > > > > On 24 Oct 2020, at 22:16, Konstantin Belousov <kostikbel@gmail.com> wrote: > > > > 30 100097 syncer - mi_switch+0xe2 sleepq_wait+0x2c sleeplk+0x185 lockmgr_xlock_hard+0x1f5 __lockmgr_args+0x2bf ffs_lock+0xa5 VOP_LOCK1_APV+0x7c _vn_lock+0x44 vget+0x4a qsync+0x99 ffs_sync+0x7d5 sync_fsync+0x10f VOP_FSYNC_APV+0x7c sched_sync+0x379 fork_exit+0x83 fork_trampoline+0xe > > > > In another system that has no stuck processes it shows: > > procstat -kk 33 > PID TID COMM TDNAME KSTACK > 33 100100 syncer - mi_switch+0xe2 sleepq_timedwait+0x2f _cv_timedwait_sbt+0x17a sched_sync+0x714 fork_exit+0x83 fork_trampoline+0xe > > But how we know that syncer lock it's related to quota? Because of qsync().
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