* Re: [PATCH] f2fs: do not support mmap write for large folio
[not found] <20260406154940.2407853-1-jaegeuk@kernel.org>
@ 2026-04-07 5:17 ` Christoph Hellwig
0 siblings, 0 replies; only message in thread
From: Christoph Hellwig @ 2026-04-07 5:17 UTC (permalink / raw)
To: Jaegeuk Kim; +Cc: linux-kernel, linux-mm
On Mon, Apr 06, 2026 at 03:49:40PM +0000, Jaegeuk Kim wrote:
> Let's check mmmap writes onto the large folio.
Why? And how is this not breaking applications?
>
> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
> ---
> fs/f2fs/file.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
> index 2c4880f24b54..edfc3a374c40 100644
> --- a/fs/f2fs/file.c
> +++ b/fs/f2fs/file.c
> @@ -82,7 +82,7 @@ static vm_fault_t f2fs_vm_page_mkwrite(struct vm_fault *vmf)
> int err = 0;
> vm_fault_t ret;
>
> - if (unlikely(IS_IMMUTABLE(inode)))
> + if (mapping_large_folio_support(inode->i_mapping))
> return VM_FAULT_SIGBUS;
>
> if (is_inode_flag_set(inode, FI_COMPRESS_RELEASED)) {
> --
> 2.53.0.1213.gd9a14994de-goog
>
>
---end quoted text---
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[not found] <20260406154940.2407853-1-jaegeuk@kernel.org>
2026-04-07 5:17 ` [PATCH] f2fs: do not support mmap write for large folio Christoph Hellwig
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