From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ritesh Harjani Subject: [PATCH-Review] f2fs: Set GF_NOFS in read_cache_page_gfp while doing f2fs_quota_read Date: Fri, 16 Mar 2018 18:53:52 +0530 Message-ID: <1521206633-21378-1-git-send-email-riteshh@codeaurora.org> Return-path: Sender: linux-kernel-owner@vger.kernel.org To: jaegeuk@kernel.org, yuchao0@huawei.com, linux-f2fs-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org Cc: stummala@codeaurora.org, Ritesh Harjani List-Id: linux-f2fs-devel.lists.sourceforge.net Hello, Observed below deadlock with quota enabled on f2fs during low memory situation. I think during f2fs_quota_enable -> which is doing read_cache_page with __GFP_FS flag set, due to low memory this is causing shrinker to get invoked and thus going into a deadlock due to mutex lock in dquota. Commit details in next patch contains the call stack. Since I did not had the quota enabled on f2fs configuration, I could not test this on my setup yet. Could the community kindly review and let me know if the patch is correct or not ? Ritesh Harjani (1): f2fs: Set GF_NOFS in read_cache_page_gfp while doing f2fs_quota_read fs/f2fs/super.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) -- The Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project.