D26570.id77616.diff
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D26570.id77616.diff
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	Index: sys/kern/vfs_vnops.c.sav3
	===================================================================
	--- sys/kern/vfs_vnops.c.sav3
	+++ sys/kern/vfs_vnops.c.sav3
	@@ -3009,7 +3009,7 @@
	int error;
	bool cantseek, readzeros, eof, lastblock;
	ssize_t aresid;
	- size_t copylen, len, savlen;
	+ size_t copylen, len, rem, savlen;
	char *dat;
	long holein, holeout;
	uint64_t curtime, stoptime;
	@@ -3083,6 +3083,16 @@
	* This value is clipped at 4Kbytes and 1Mbyte.
	*/
	blksize = MAX(holein, holeout);
	+
	+ /* Clip len to end at an exact multiple of hole size. */
	+ if (blksize > 0) {
	+ rem = *inoffp % blksize;
	+ if (rem > 0)
	+ rem = blksize - rem;
	+ if (len - rem > blksize)
	+ len = rounddown(len - rem, blksize) + rem;
	+ }
	+
	if (blksize == 0)
	blksize = MAX(invp->v_mount->mnt_stat.f_iosize,
	outvp->v_mount->mnt_stat.f_iosize);