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From: Ayush Ranjan <ayushr@modal.com>
To: Pedro Falcato <pfalcato@suse.de>
Cc: Ayush Ranjan <ayushr@modal.com>, Hugh Dickins <hughd@google.com>,
	Matthew Wilcox <willy@infradead.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	Jan Kara <jack@suse.cz>,
	Baolin Wang <baolin.wang@linux.alibaba.com>,
	David Hildenbrand <david@kernel.org>,
	Gregory Price <gourry@gourry.net>,
	linux-mm@kvack.org, linux-fsdevel@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: Re: [BUG] shmem: FALLOC_FL_PUNCH_HOLE vs fault-around race corrupts page cache / rss counters
Date: Sat,  3 Oct 2026 03:31:03 +0000	[thread overview]
Message-ID: <20261003033107.1488699-1-ayushr@modal.com> (raw)
In-Reply-To: <20260925065013.3682431-1-ayushr@modal.com>

Hi all,

Gentle ping on this. The reproducer in my previous mail [1] triggers
"Bad page cache ... still mapped when deleted" on 6.18.46 within a
couple of minutes on a 128-CPU bare-metal box, with no fork() and no
gVisor involved.

We continue to hit this in production at low frequency, so I am happy
to test patches or collect more data if that would help.

Thanks,
Ayush

[1] https://lore.kernel.org/all/20260925065013.3682431-1-ayushr@modal.com/

  reply	other threads:[~2026-10-03  3:31 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-09-24  6:16 Ayush Ranjan
2026-09-24  7:12 ` David Hildenbrand (Arm)
2026-09-24  8:34 ` Pedro Falcato
2026-09-24  9:15   ` Jan Kara
2026-09-25  5:32     ` Ayush Ranjan
2026-09-24  9:30   ` Baolin Wang
2026-09-25  5:33     ` Ayush Ranjan
2026-09-25  5:30   ` Ayush Ranjan
2026-09-25  6:50     ` Ayush Ranjan
2026-10-03  3:31       ` Ayush Ranjan [this message]
2026-10-05  5:28         ` Andrew Morton

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