From: Kiryl Shutsemau <kas@kernel.org>
To: Usama Arif <usama.arif@linux.dev>
Cc: Andrew Morton <akpm@linux-foundation.org>,
david@kernel.org, willy@infradead.org, ryan.roberts@arm.com,
linux-mm@kvack.org, r@hev.cc, jack@suse.cz, ajd@linux.ibm.com,
apopple@nvidia.com, baohua@kernel.org,
baolin.wang@linux.alibaba.com, brauner@kernel.org,
catalin.marinas@arm.com, dev.jain@arm.com, kees@kernel.org,
kevin.brodsky@arm.com, lance.yang@linux.dev,
Liam.Howlett@oracle.com, linux-arm-kernel@lists.infradead.org,
linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
lorenzo.stoakes@oracle.com, mhocko@suse.com, npache@redhat.com,
pasha.tatashin@soleen.com, rmclure@linux.ibm.com,
rppt@kernel.org, surenb@google.com, vbabka@kernel.org,
Al Viro <viro@zeniv.linux.org.uk>,
wilts@infradead.org, ziy@nvidia.com, hannes@cmpxchg.org,
shakeel.butt@linux.dev, kernel-team@meta.com
Subject: Re: [PATCH v2 1/4] mm: bypass mmap_miss heuristic for VM_EXEC readahead
Date: Fri, 20 Mar 2026 14:26:43 +0000 [thread overview]
Message-ID: <ab1Y5fLNJ466kK-7@thinkstation> (raw)
In-Reply-To: <20260320140315.979307-2-usama.arif@linux.dev>
On Fri, Mar 20, 2026 at 06:58:51AM -0700, Usama Arif wrote:
> diff --git a/mm/filemap.c b/mm/filemap.c
> index 6cd7974d4adab..7d89c6b384cc4 100644
> --- a/mm/filemap.c
> +++ b/mm/filemap.c
> @@ -3331,7 +3331,7 @@ static struct file *do_sync_mmap_readahead(struct vm_fault *vmf)
> }
> }
>
> - if (!(vm_flags & VM_SEQ_READ)) {
> + if (!(vm_flags & (VM_SEQ_READ | VM_EXEC))) {
Strictly speaking the fact that the file mapped as executable doesn't
mean we are serving instruction fetch page fault.
FAULT_FLAG_INSTRUCTION would be the signal, but it is only provided by
handful of architectures.
VM_EXEC is good enough proxy.
Reviewed-by: Kiryl Shutsemau (Meta) <kas@kernel.org>
--
Kiryl Shutsemau / Kirill A. Shutemov
next prev parent reply other threads:[~2026-03-20 14:26 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-20 13:58 [PATCH v2 0/4] mm: improve large folio readahead and alignment for exec memory Usama Arif
2026-03-20 13:58 ` [PATCH v2 1/4] mm: bypass mmap_miss heuristic for VM_EXEC readahead Usama Arif
2026-03-20 14:18 ` Jan Kara
2026-03-20 14:26 ` Kiryl Shutsemau [this message]
2026-03-20 13:58 ` [PATCH v2 2/4] mm: replace exec_folio_order() with generic preferred_exec_order() Usama Arif
2026-03-20 14:41 ` Kiryl Shutsemau
2026-03-20 14:42 ` Jan Kara
2026-03-26 12:40 ` Usama Arif
2026-03-20 13:58 ` [PATCH v2 3/4] elf: align ET_DYN base to max folio size for PTE coalescing Usama Arif
2026-03-20 14:55 ` Kiryl Shutsemau
2026-03-20 15:58 ` Matthew Wilcox
2026-03-20 16:05 ` WANG Rui
2026-03-20 17:47 ` Matthew Wilcox
2026-03-20 13:58 ` [PATCH v2 4/4] mm: align file-backed mmap to max folio order in thp_get_unmapped_area Usama Arif
2026-03-20 15:06 ` Kiryl Shutsemau
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