Re: [f2fs-dev] [PATCH v2] f2fs: another way to set large folio by remembering inode number

Bart Van Assche <[email protected]>
Newsgroups org.kernel.vger.linux-api,net.sourceforge.lists.linux-f2fs-devel,org.kernel.vger.linux-fsdevel,org.kernel.vger.linux-kernel,org.kvack.linux-mm
Message-ID <[email protected]> 
On 5/26/26 6:42 AM, Theodore Tso wrote:
> It seems... surprising that the additional I/O operations are actually
> throttloing UFS device bandwidth by 2x (4GB/s vs 2GB/s).  Have you dug
> into why this is happening, and whether there is anything that can be
> optimized below the file system?
The layers below the filesystem (block, SCSI, UFS) is what I'm
responsible for in the Pixel team and I can assure you that these are
highly optimized.

Since the transfer size used in Jaegeuk's tests is much larger than 4
KiB, how many CPU cycles are used per IO by the layers below the
filesystem is not limiting the transfer bandwidth.

Bart.
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