Attachment 243361 Details for Bug 349001 – Annotated glock history of the problem--first version

Annotated glock history of the problem--first version

mousetrap.morph-04.condensed.annotated (text/plain), 7.12 KB, created by Robert Peterson on 2007-10-30 13:46:35 UTC

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Creator: Robert Peterson

Created: 2007-10-30 13:46:35 UTC

Size: 7.12 KB

patch

obsolete

>Glock (2, 66860)
>  gl_flags =GLF_LOCK 
>  gl_count = 8
>  gl_state = 1 (LM_ST_EXCLUSIVE)
>  req_gh = yes
>  req_bh = yes
>  lvb_count = 0
>  object = yes
>  new_le = no
>  incore_le = no
>  reclaim = no
>  aspace = 2
>  ail_bufs = no
>  Request
>    owner = -1
>    gh_state = 0
>    gh_flags = 0 
>    error = 0
>    gh_iflags = 2 4 5 
>  Waiter2
>    owner = -1
>    gh_state = 0
>    gh_flags = 0 
>    error = 0
>    gh_iflags = 2 4 5 
>  Waiter3
>    owner = 25766
>    gh_state = 3
>    gh_flags = 3 
>    error = 0
>    gh_iflags = 1 
>  Waiter3
>    owner = 25765
>    gh_state = 2
>    gh_flags = 
>    error = 0
>    gh_iflags = 1 
>  Waiter3
>    owner = 25768
>    gh_state = 2
>    gh_flags = 
>    error = 0
>    gh_iflags = 1 
>  Inode: busy
>  Glock history:
>    99304: RQ_PROMOTE4: LM_ST_DEFERRED, ref = 5, flags=1
>    99305: gfs_holder_init: LM_ST_DEFERRED, ref = 6, flags=1
>    99306: gfs_glock_dq: LM_ST_DEFERRED, ref = 5, flags=1
>    99307: gfs_holder_init: LM_ST_DEFERRED, ref = 5, flags=1
>    99308: GFS_GLOCK_NQ: LM_ST_DEFERRED, ref = 5, flags=1
>    99309: RQ_PROMOTE4: LM_ST_DEFERRED, ref = 5, flags=1
>    99310: gfs_holder_init: LM_ST_DEFERRED, ref = 6, flags=1
>    99311: gfs_glock_dq: LM_ST_DEFERRED, ref = 5, flags=1
>    99312: gfs_holder_init: LM_ST_DEFERRED, ref = 5, flags=1
>    99313: gfs_glock_dq: LM_ST_DEFERRED, ref = 4, flags=0
>    99314: gfs_holder_init: LM_ST_DEFERRED, ref = 4, flags=0
>    99315: GFS_GLOCK_NQ: LM_ST_DEFERRED, ref = 4, flags=0
>    99316: RQ_PROMOTE4: LM_ST_DEFERRED, ref = 4, flags=1
>    99317: gfs_holder_init: LM_ST_DEFERRED, ref = 5, flags=1
>    99318: gfs_glock_dq: LM_ST_DEFERRED, ref = 4, flags=0
>    99319: gfs_holder_init: LM_ST_DEFERRED, ref = 4, flags=0
>    99320: GFS_GLOCK_NQ: LM_ST_DEFERRED, ref = 4, flags=0
>    99321: RQ_PROMOTE4: LM_ST_DEFERRED, ref = 4, flags=1
>    99322: gfs_holder_init: LM_ST_DEFERRED, ref = 5, flags=1
>    99323: gfs_glock_dq: LM_ST_DEFERRED, ref = 4, flags=0
>    99324: gfs_holder_init: LM_ST_DEFERRED, ref = 4, flags=0
>    99325: GFS_GLOCK_NQ: LM_ST_DEFERRED, ref = 4, flags=0
>    99326: RQ_PROMOTE4: LM_ST_DEFERRED, ref = 4, flags=1
>    99327: gfs_holder_init: LM_ST_DEFERRED, ref = 5, flags=1
>    99328: gfs_glock_dq: LM_ST_DEFERRED, ref = 4, flags=0
>    99329: gfs_holder_init: LM_ST_DEFERRED, ref = 4, flags=0
>    99330: GFS_GLOCK_NQ: LM_ST_DEFERRED, ref = 4, flags=0
>    99331: RQ_PROMOTE4: LM_ST_DEFERRED, ref = 4, flags=1
>    99332: gfs_holder_init: LM_ST_DEFERRED, ref = 5, flags=1
>    99333: gfs_glock_dq: LM_ST_DEFERRED, ref = 4, flags=0
>    99334: gfs_holder_init: LM_ST_DEFERRED, ref = 4, flags=0
>    99335: GFS_GLOCK_NQ: LM_ST_DEFERRED, ref = 4, flags=0
>    99336: RQ_PROMOTE4: LM_ST_DEFERRED, ref = 4, flags=1
>    99337: gfs_holder_init: LM_ST_DEFERRED, ref = 5, flags=1
>    99338: gfs_glock_dq: LM_ST_DEFERRED, ref = 4, flags=0
>    99339: gfs_holder_init: LM_ST_DEFERRED, ref = 4, flags=0
>    99340: GFS_GLOCK_NQ: LM_ST_DEFERRED, ref = 4, flags=0
>    99341: RQ_PROMOTE4: LM_ST_DEFERRED, ref = 4, flags=1
>    99342: gfs_holder_init: LM_ST_DEFERRED, ref = 5, flags=1
>    99343: gfs_glock_dq: LM_ST_DEFERRED, ref = 4, flags=0
>    99344: gfs_holder_init: LM_ST_DEFERRED, ref = 4, flags=0
>    99345: GFS_GLOCK_NQ: LM_ST_DEFERRED, ref = 4, flags=0
>    99346: RQ_PROMOTE4: LM_ST_DEFERRED, ref = 4, flags=1
>    99347: gfs_holder_init: LM_ST_DEFERRED, ref = 5, flags=1
>    99348: gfs_glock_dq: LM_ST_DEFERRED, ref = 4, flags=0
>    99349: gfs_holder_init: LM_ST_DEFERRED, ref = 4, flags=0
>    99350: GFS_GLOCK_NQ: LM_ST_DEFERRED, ref = 4, flags=0
>    99351: RQ_PROMOTE4: LM_ST_DEFERRED, ref = 4, flags=1
>    99352: gfs_holder_init: LM_ST_DEFERRED, ref = 5, flags=1
>    99353: gfs_glock_dq: LM_ST_DEFERRED, ref = 4, flags=0
>    99354: gfs_holder_init: LM_ST_DEFERRED, ref = 4, flags=0
>    99355: GFS_GLOCK_NQ: LM_ST_DEFERRED, ref = 4, flags=0
>    99356: RQ_PROMOTE4: LM_ST_DEFERRED, ref = 4, flags=1
>    99357: gfs_holder_init: LM_ST_DEFERRED, ref = 5, flags=1
>    99358: gfs_glock_dq: LM_ST_DEFERRED, ref = 4, flags=0
>    99359: gfs_holder_init: LM_ST_DEFERRED, ref = 4, flags=0
>    99360: GFS_GLOCK_NQ: LM_ST_DEFERRED, ref = 4, flags=0
>    99361: RQ_PROMOTE4: LM_ST_DEFERRED, ref = 4, flags=1
>    99362: gfs_holder_init: LM_ST_DEFERRED, ref = 5, flags=1
>    99363: gfs_glock_dq: LM_ST_DEFERRED, ref = 4, flags=0
>    99364: gfs_holder_init: LM_ST_DEFERRED, ref = 4, flags=0
>    99365: GFS_GLOCK_NQ: LM_ST_DEFERRED, ref = 4, flags=0
>    99366: RQ_PROMOTE4: LM_ST_DEFERRED, ref = 4, flags=1
>    99367: gfs_holder_init: LM_ST_DEFERRED, ref = 5, flags=1
>    99368: gfs_glock_dq: LM_ST_DEFERRED, ref = 4, flags=0
>    99369: gfs_holder_init: LM_ST_DEFERRED, ref = 4, flags=0
>    99370: GFS_GLOCK_NQ: LM_ST_DEFERRED, ref = 4, flags=0
>    99371: RQ_PROMOTE4: LM_ST_DEFERRED, ref = 4, flags=1
>    99372: gfs_holder_init: LM_ST_DEFERRED, ref = 5, flags=1
>    99373: GFS_GLOCK_NQ: LM_ST_DEFERRED, ref = 5, flags=1
>    99374: RQ_PROMOTE4: LM_ST_DEFERRED, ref = 5, flags=1
>    99375: gfs_holder_init: LM_ST_DEFERRED, ref = 6, flags=1
>    99376: gfs_glock_dq: LM_ST_DEFERRED, ref = 5, flags=1
>    99377: gfs_holder_init: LM_ST_DEFERRED, ref = 5, flags=1
>    99378: gfs_glock_dq: LM_ST_DEFERRED, ref = 4, flags=0
>    99379: gfs_holder_init: LM_ST_DEFERRED, ref = 4, flags=0
>    99380: GFS_GLOCK_NQ: LM_ST_DEFERRED, ref = 4, flags=0
>    99381: RQ_PROMOTE4: LM_ST_DEFERRED, ref = 4, flags=1
>    99382: gfs_holder_init: LM_ST_DEFERRED, ref = 5, flags=1
>    99383: gfs_glock_dq: LM_ST_DEFERRED, ref = 4, flags=0
>    99384: gfs_holder_init: LM_ST_DEFERRED, ref = 4, flags=0
>    99385: GFS_GLOCK_NQ: LM_ST_DEFERRED, ref = 4, flags=0
>    99386: gfs_glock_xmote_th: LM_ST_DEFERRED, ref = 5, flags=1000
>---- flags 1000 indicates someone is on waiters3 only
>    99387: RQ_PROMOTE: LM_ST_DEFERRED, ref = 5, flags=1000
>    99388: search_bucket: LM_ST_DEFERRED, ref = 6, flags=1000
>    99389: state_change: LM_ST_EXCLUSIVE, ref = 6, flags=1000
>---- means xmote_bh was called, old state == deferred, new == exclusive
>    99390: search_bucket: LM_ST_EXCLUSIVE, ref = 7, flags=1000
>---- means someone else wanted it
>    99391: gfs_holder_init: LM_ST_EXCLUSIVE, ref = 8, flags=1000
>    99392: HANDLE_CALLBACK: LM_ST_EXCLUSIVE, ref = 8, flags=1100
>---- new holder added to glock's demote request queue
>---- flags 1100 indicates someone now on waiters2 and waiters3
>    99393: LM_CB_ASYNC: LM_ST_EXCLUSIVE, ref = 5, flags=101
>---- flags 101 indicates the guy on waiter3 was given the hold.
>    99394: gfs_holder_init: LM_ST_EXCLUSIVE, ref = 6, flags=101
>    99395: GFS_GLOCK_NQ: LM_ST_EXCLUSIVE, ref = 6, flags=101
>    99396: gfs_holder_init: LM_ST_EXCLUSIVE, ref = 7, flags=1101
>---- someone now on waiters2 and 3, plus a holder
>    99397: RQ_DEMOTE: LM_ST_EXCLUSIVE, ref = 6, flags=1100
>---- Somehow our guy got off the holders queue
>    99398: gfs_glock_drop_th: LM_ST_EXCLUSIVE, ref = 7, flags=1100
>    99399: gfs_glock_dq: LM_ST_EXCLUSIVE, ref = 7, flags=1100
>---- Now we're at the end of gfs_glock_dq but it was never unlocked or demoted
>    99400: gfs_holder_init: LM_ST_EXCLUSIVE, ref = 7, flags=1100
>    99401: GFS_GLOCK_NQ: LM_ST_EXCLUSIVE, ref = 7, flags=1100
>    99402: gfs_holder_init: LM_ST_EXCLUSIVE, ref = 8, flags=1100
>    99403: GFS_GLOCK_NQ: LM_ST_EXCLUSIVE, ref = 8, flags=1100
>
>0001 = holders
>0010 = waiters1
>0100 = waiters2
>1000 = waiters3

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Attachments on bug 349001: 240911 | 243361