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From: Muchun Song <muchun.song@linux.dev>
To: Dafna Hirschfeld <dafna.hirschfeld@intel.com>
Cc: linux-mm@kvack.org, akpm@linux-foundation.org, willy@infradead.org
Subject: Re: [PATCH] mm/hugetlb: change ENOSPC to ENOMEM in alloc_hugetlb_folio
Date: Mon, 2 Dec 2024 11:49:01 +0800	[thread overview]
Message-ID: <BA8384B8-2A4E-434C-AD5C-DE6599D7FA3D@linux.dev> (raw)
In-Reply-To: <20241201010341.1382431-1-dafna.hirschfeld@intel.com>



> On Dec 1, 2024, at 09:03, Dafna Hirschfeld <dafna.hirschfeld@intel.com> wrote:
> 
> The error ENOSPC is translated in vmf_error to VM_FAULT_SIGBUS which is
> further translated in EFAULT in i.e. pin/get_user_pages.
> But when running out of pages/hugepages we expect to see ENOMEM and
> not EFAULT.

Hi Dafna,

Refers to Documentation/mm/hugetlbfs_reserv.rst. I saw:

    If no huge page exists at page fault time, the task is sent
    a **SIGBUS** and often dies an unhappy death.

Seems SIGBUS is expected since it is introduced.

Thanks.

  parent reply	other threads:[~2024-12-02  3:49 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-12-01  1:03 Dafna Hirschfeld
2024-12-01  2:51 ` Andrew Morton
2024-12-14  9:18   ` Alexander Gordeev
2024-12-01 11:49 ` Matthew Wilcox
2024-12-02  3:49 ` Muchun Song [this message]
2024-12-02  6:02   ` Dafna Hirschfeld
2024-12-02  6:06   ` Dafna Hirschfeld
2024-12-08  5:20   ` Dafna Hirschfeld

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