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Date: Sun, 17 May 2015 00:50:30 +0300 From: Azat Khuzhin <a3at.mail@...il.com> To: Zach Brown <zab@...bo.net> Cc: Sage Weil <sweil@...hat.com>, linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org, linux-api@...r.kernel.org Subject: Re: [PATCH RFC v2 2/2] vfs: add O_NOCMTIME On Fri, May 15, 2015 at 02:23:48PM -0700, Zach Brown wrote: > Add a O_NOCMTIME flag which prevents inode time updates on writes and > can greatly reduce the IO overhead of writes to allocated and > initialized regions of files. > --- a/include/linux/fs.h > +++ b/include/linux/fs.h You may also want to resolve this: /* * Don't update ctime and mtime. * * Currently a special hack for the XFS open_by_handle ioctl, but we'll * hopefully graduate it to a proper O_CMTIME flag supported by open(2) soon. */ #define FMODE_NOCMTIME ((__force fmode_t)0x800) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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