Thread: pgsql: Fix deadlock between ginDeletePage() and ginStepRight()
Fix deadlock between ginDeletePage() and ginStepRight() When ginDeletePage() is about to delete page it locks its left sibling to revise the rightlink. So, it locks pages in right to left manner. Int he same time ginStepRight() locks pages in left to right manner, and that could cause a deadlock. This commit makes ginScanToDelete() keep exclusive lock on left siblings of currently investigated path. That elimites need to relock left sibling in ginDeletePage(). Thus, deadlock with ginStepRight() can't happen anymore. Reported-by: Chen Huajun Discussion: https://postgr.es/m/5c332bd1.87b6.16d7c17aa98.Coremail.chjischj%40163.com Author: Alexander Korotkov Reviewed-by: Peter Geoghegan Backpatch-through: 10 Branch ------ master Details ------- https://git.postgresql.org/pg/commitdiff/e14641197a5690d92cc48446d0d40f1aec07bac7 Modified Files -------------- src/backend/access/gin/README | 79 ++++++++++++++++++++++---------------- src/backend/access/gin/ginvacuum.c | 54 +++++++++++++++++--------- 2 files changed, 81 insertions(+), 52 deletions(-)